Nanostructured Materials for Photovoltaic Energy Group

Group Leader: Mónica Lira-Cantú

Publications

2017

  • Facile and low cost oxidative conversion of MoS2 in α-MoO3: Synthesis, characterization and application

    Bortoti A.A., Gavanski A.D.F., Velazquez Y.R., Galli A., de Castro E.G. Journal of Solid State Chemistry; 252: 111 - 118. 2017. 10.1016/j.jssc.2017.05.006. IF: 2.299

    This study describes a facile low cost route to synthesize the α-MoO3 through a conversion of the precursor MoS2 in oxidant media. The structure and morphology of the α-MoO3 were studied by high resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The results show that α-MoO3 was obtained with reduced size, high purity, strongly-preferred orientation and structural defects, which ensures versatility and multifunctionality to this sample. For the purpose of applications, α-MoO3 was successfully employed in inverted organic solar cells devices as a possible alternative to the PEDOT:PSS in the hole transportation layer. © 2017 Elsevier Inc.


  • Incorporation of Counter Ions in Organic Molecules: New Strategy in Developing Dopant-Free Hole Transport Materials for Efficient Mixed-Ion Perovskite Solar Cells

    Zhang J., Xu B., Yang L., Mingorance A., Ruan C., Hua Y., Wang L., Vlachopoulos N., Lira-Cantú M., Boschloo G., Hagfeldt A., Sun L., Johansson E.M.J. Advanced Energy Materials; 7 (14) 2017. 10.1002/aenm.201602736. IF: 16.721

    Hole transport matertial (HTM) as charge selective layer in perovskite solar cells (PSCs) plays an important role in achieving high power conversion efficiency (PCE). It is known that the dopants and additives are necessary in the HTM in order to improve the hole conductivity of the HTM as well as to obtain high efficiency in PSCs, but the additives can potentially induce device instability and poor device reproducibility. In this work a new strategy to design dopant-free HTMs has been presented by modifying the HTM to include charged moieties which are accompanied with counter ions. The device based on this ionic HTM X44 dos not need any additional doping and the device shows an impressive PCE of 16.2%. Detailed characterization suggests that the incorporated counter ions in X44 can significantly affect the hole conductivity and the homogeneity of the formed HTM thin film. The superior photovoltaic performance for X44 is attributed to both efficient hole transport and effective interfacial hole transfer in the solar cell device. This work provides important insights as regards the future design of new and efficient dopant free HTMs for photovotaics or other optoelectronic applications. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • Perovskite solar cells: Stability lies at interfaces

    Lira-Cantú M. Nature Energy; 2 (7, 17115) 2017. 10.1038/nenergy.2017.115. IF: 9.086

    [No abstract available]


2016

  • 3C-SiC Transistor with Ohmic Contacts Defined at Room Temperature

    Li F., Sharma Y., Walker D., Hindmarsh S., Jennings M., Martin D., Fisher C., Gammon P., Pérez-Tomás A., Mawby P. IEEE Electron Device Letters; 37 (9, 7518645): 1189 - 1192. 2016. 10.1109/LED.2016.2593771. IF: 2.528

    Among all SiC polytypes, only 3C-SiC has a cubic structure and can be hetero-epitaxial grown on large area Si substrate, thus providing an alternative choice for fabricating cheap wide bandgap power devices. Here, we present a low resistivity (~3 × 10-5Ω cm2) ohmic contact formed by directly depositing a Ti/Ni metal stack on n-type 3C-SiC without any extra annealing. For the first time, 3C-SiC lateral MOSFETs with asdeposited ohmic contacts were fabricated, and it turned out not only the ohmic contact is free from any interface voids, but also a higher field-effect mobility value (~80 cm2/V · s) was achieved compared with the annealed devices. © 1980-2012 IEEE.


  • Above-Bandgap Photovoltages in Antiferroelectrics

    Pérez-Tomás A., Lira-Cantú M., Catalan G. Advanced Materials; 28 (43): 9644 - 9647. 2016. 10.1002/adma.201603176. IF: 18.960

    The closed circuit photocurrent and open circuit photovoltage of antiferroelectric thin films were characterized both in their ground (antipolar) state and in their polarized state. A sharp transition happens from near zero to large photovoltages as the polarization is switched on, consistent with the activation of the bulk photovoltaic effect. The AFE layers have been grown by a solution processing method (sol?gel synthesis followed by spin coating deposition) onto fluorine-doped tin oxide (FTO), a transparent conducting oxide with low sheet resistance and a higher resilience to high-temperature processing than indium tin oxide and a standard for solar cells such as organometal trihalide perovskites. Light absorption confirmed that the PZO films are, as expected, wide-band gap semiconductors with a gap of 3.7.8 eV and thus highly absorbing in the near-ultraviolet range. On a virgin sample, there is no shortcircuit photocurrent, consistent with the antipolar nature of the ground state. As an external bias voltage is applied, the current remains negligible until suddenly, at the coercive voltage, a spike is observed, corresponding to the transient displacement current caused by the onset of polarization.


  • Baselines for Lifetime of Organic Solar Cells

    Gevorgyan S.A., Espinosa N., Ciammaruchi L., Roth B., Livi F., Tsopanidis S., Züfle S., Queirós S., Gregori A., Benatto G.A.D.R., Corazza M., Madsen M.V., Hösel M., Beliatis M.J., Larsen-Olsen T.T., Pastorelli F., Castro A., Mingorance A., Lenzi V., Fluhr D., Roesch R., Maria Duarte Ramos M., Savva A., Hoppe H., Marques L.S.A., Burgués I., Georgiou E., Serrano-Luján L., Krebs F.C. Advanced Energy Materials; 6 (22, 1600910) 2016. 10.1002/aenm.201600910. IF: 15.230

    The process of accurately gauging lifetime improvements in organic photovoltaics (OPVs) or other similar emerging technologies, such as perovskites solar cells is still a major challenge. The presented work is part of a larger effort of developing a worldwide database of lifetimes that can help establishing reference baselines of stability performance for OPVs and other emerging PV technologies, which can then be utilized for pass-fail testing standards and predicting tools. The study constitutes scanning of literature articles related to stability data of OPVs, reported until mid-2015 and collecting the reported data into a database. A generic lifetime marker is utilized for rating the stability of various reported devices. The collected data is combined with an earlier developed and reported database, which was based on articles reported until mid-2013. The extended database is utilized for establishing the baselines of lifetime for OPVs tested under different conditions. The work also provides the recent progress in stability of unencapsulated OPVs with different architectures, as well as presents the updated diagram of the reported record lifetimes of OPVs. The presented work is another step forward towards the development of pass-fail testing standards and lifetime prediction tools for emerging PV technologies. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • Comparative indoor and outdoor degradation of organic photovoltaic cells via inter-laboratory collaboration

    Owens C., Ferguson G.M., Hermenau M., Voroshazi E., Galagan Y., Zimmermann B., Rösch R., Angmo D., Teran-Escobar G., Uhrich C., Andriessen R., Hoppe H., Würfel U., Lira-Cantu M., Krebs F.C., Tanenbaum D.M. Polymers; 8 (1, 1) 2016. 10.3390/polym8010001. IF: 2.944

    We report on the degradation of organic photovoltaic (OPV) cells in both indoor and outdoor environments. Eight different research groups contributed state of the art OPV cells to be studied at Pomona College. Power conversion efficiency and fill factor were determined from IV curves collected at regular intervals over six to eight months. Similarly prepared devices were measured indoors, outdoors, and after dark storage. Device architectures are compared. Cells kept indoors performed better than outdoors due to the lack of temperature and humidity extremes. Encapsulated cells performed better due to the minimal oxidation. Some devices showed steady aging but many failed catastrophically due to corrosion of electrodes not active device layers. Degradation of cells kept in dark storage was minimal over periods up to one year. © 2015 by the authors.


  • Flexible ITO-free organic solar cells applying aqueous solution-processed V2O5 hole transport layer: An outdoor stability study

    Lima F.A.S., Beliatis M.J., Roth B., Andersen T.R., Bortoti A., Reyna Y., Castro E., Vasconcelos I.F., Gevorgyan S.A., Krebs F.C., Lira-Cantu M. APL Materials; 4 (2, 026104) 2016. 10.1063/1.4942638. IF: 4.323

    Solution processable semiconductor oxides have opened a new paradigm for the enhancement of the lifetime of thin film solar cells. Their fabrication by low-cost and environmentally friendly solution-processable methods makes them ideal barrier (hole and electron) transport layers. In this work, we fabricate flexible ITO-free organic solar cells (OPV) by printing methods applying an aqueous solution-processed V2O5 as the hole transport layer (HTL) and compared them to devices applying PEDOT:PSS. The transparent conducting electrode was PET/Ag/PEDOT/ZnO, and the OPV configuration was PET/Ag/PEDOT/ZnO/P3HT:PC60BM/HTL/Ag. Outdoor stability analyses carried out for more than 900 h revealed higher stability for devices fabricated with the aqueous solution-processed V2O5. © 2016 Author(s).


  • Improved channel mobility by oxide nitridation for n-channel MOSFET on 3C-SiC(100)/Si

    Li F., Sharma Y.K., Jennings M.R., Pérez-Tomás A., Shah V.A., Rong H., Russell S.A.O., Martin D.M., Mawby P.A. Materials Science Forum; 858: 667 - 670. 2016. 10.4028/www.scientific.net/MSF.858.667. IF: 0.000

    In this work we studied the gate oxidation temperature and nitridation influences on the resultant 3C-SiC MOSFET forward characteristics. Conventional long channel lateral MOSFETs were fabricated on 3C-SiC(100) epilayers grown on Si substrates using five different oxidation processes. Both room temperature and high temperature (up to 500K) forward IV performance were characterised, and channel mobility as high as 90cm2/V.s was obtained for devices with nitrided gate oxide, considerable higher than the ones without nitridation process (~70 cm2/V.s). © 2016 Trans Tech Publications, Switzerland.


  • Performance and stability of mixed FAPbI3(0.85)MAPbBr3(0.15) halide perovskite solar cells under outdoor conditions and the effect of low light irradiation

    Reyna Y., Salado M., Kazim S., Pérez-Tomas A., Ahmad S., Lira-Cantu M. Nano Energy; 30: 570 - 579. 2016. 10.1016/j.nanoen.2016.10.053. IF: 11.553

    We demonstrate for the first time, the real lifetime response of mixed halide perovskite solar cells (PSCs) for >1000 h under outdoor conditions and the exceptional photoresponse observed at low-light intensities attributed to the ionic-electronic nature of the material. The investigated devices were fabricated by utilizing mixed perovskites containing formamidinium (FA) and methylammonium (MA) cations, in a one step solution-process method through a solvent engineering approach. The devices’ architecture is FTO/TiO2 (blocking layer) TiO2 (mesoporous)/FAPbI3(0.85)MAPbBr3(0.15)/Spiro-OMeTAD/Au. Notably, low short circuit current (Jsc) was observed at low light intensities (<50 W/m2) together with high open circuit potential build-up, which resulted in high PCEs. This response is in agreement with a “double electronic-ionic transport” model of the halide perovskite where the ionic component dominates at low light intensities and the electronic component dictates at high light irradiances. Our results highlight the exceptional stability of mixed MA/FA mesoscopic PSCs when operated for >1000 h under real outdoor conditions and the strong ionic component observed at low light irradiation. © 2016 Elsevier Ltd


2015

  • Electrochemically synthesized mesoporous thin films of ZnO for highly efficient dye sensitized solar cells

    Lima F.A.S., Vasconcelos I.F., Lira-Cantu M. Ceramics International; 41 (8, 10350): 9314 - 9320. 2015. 10.1016/j.ceramint.2015.03.271. IF: 2.605

    Abstract In this work, nanostructured thin films of ZnO were electrochemically grown on FTO substrates. The morphology was tuned by modifying the synthesis parameters. The synthesis was carried out by applying Zn(NO3)·6H2O as the sole component of the aqueous electrolyte, avoiding the use of capping agents. The composition and morphology of the prepared ZnO were characterized by energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM), respectively. The as-deposited films were applied as electrodes in dye sensitized solar cells (DSCs). The performance of the cells was investigated by J×V curves and IPCE (incident photon to charge carrier efficiency) measurements. The SEM analysis demonstrated a direct relationship between ZnO morphology and Zn precursor concentration. It has been shown that the lower the concentration is, the more porous the morphology is. Increasing the amount of dye adsorbed on the ZnO decreased the power conversion efficiency of the final DSCs. The best cell presented the following parameters: open circuit voltage VOC=0.59V, short circuit current JSC=7.64mA/cm2, fill factor FF=50.41%, and power conversion efficiency PCE=2.27%. © 2015 Elsevier Ltd and Techna Group S.r.l.


  • Emerging thin-film photovoltaics: Stabilize or Perish

    Von Hauff E., Lira-Cantu M., Brown T.M., Hoppe H. Advanced Energy Materials; 5 (20, 1501924) 2015. 10.1002/aenm.201501924. IF: 16.146

    [No abstract available]


  • Enhanced photovoltaic performance of inverted hybrid bulk-heterojunction solar cells using TiO2/reduced graphene oxide films as electron transport layers

    Morais A., Alves J.P.C., Lima F.A.S., Lira-Cantu M., Nogueira A.F. Journal of Photonics for Energy; 5 (1, 57408) 2015. 10.1117/1.JPE.5.057408. IF: 1.366

    In this study, we investigated inverted hybrid bulk-heterojunction solar cells with the following configuration: fluorine-doped tin oxide (FTO) jTiO2/RGOjP3HT:PC61BMjV2O5 or PEDOT:PSS|Ag. The TiO2/GO dispersions were prepared by sol-gel method, employing titanium isopropoxide and graphene oxide (GO) as starting materials. The GO concentration was varied from 0.1 to 4.0 wt%. The corresponding dispersions were spin-coated onto FTO substrates and a thermal treatment was performed to remove organic materials and to reduce GO to reduced graphene oxide (RGO). The TiO2/RGO films were characterized by X-ray diffraction, Raman spectroscopy, and microscopy techniques. Atomic force microscopy (AFM) images showed that the addition of RGO significantly changes the morphology of the TiO2 films, with loss of uniformity and increase in surface roughness. Independent of the use of V2O5 or PEDOT: PSS films as the hole transport layer, the incorporation of 2.0 wt% of RGO into TiO2 films was the optimal concentration for the best organic photovoltaic performance. The solar cells based on TiO2/RGO (2.0 wt%) electrode exhibited a ~22.3% and ~28.9% short circuit current density (Jsc) and a power conversion efficiency enhancement, respectively, if compared with the devices based on pure TiO2 films. Kelvin probe force microscopy images suggest that the incorporation of RGO into TiO2 films can promote the appearance of regions with different charge dissipation capacities. © 2015 Society of Photo-Optical Instrumentation Engineers.


  • Procedures and practices for evaluating thin-film solar cell stability

    Roesch R., Faber T., Von Hauff E., Brown T.M., Lira-Cantu M., Hoppe H. Advanced Energy Materials; 5 (20, 1501407) 2015. 10.1002/aenm.201501407. IF: 16.146

    During the last few decades, and in some cases only the last few years, novel thin-film photovoltaic (PV) technologies such as dye-sensitized solar cells (DSSC), organic solar cells (OPV), and, more recently, perovskite-based solar cells (PSC) have been growing in maturity with respect to device performance and device stability. Together with new material systems, novel device architectures have also been introduced. Both parameters will have an effect on the overall device stability. In order to improve the understanding of degradation effects and how they can be prevented, stress testing under different conditions is commonly applied. By careful combination of stress factors and thorough analysis of photovoltaic parameter decaying curves, an understanding of the underlying degradation pathways can be gained. With the help of standardized and accelerated stress tests, as described in the ISOS-protocols, statements concerning application lifetimes can finally be made and compared among different labs. Once a photovoltaic technology has proven long lasting durability, the ultimate barrier for entering the commercial market are the IEC tests, taking a deeper look on overall safety and reliability, not only on durability. Here, the most prominent stress tests are reviewed, discussed and extended with respect to learning the most about photovoltaic device stability. Common procedures and practices for evaluating thin-film solar cell stability and durability are reviewed with respect to their applicability for predicting failure routes and application lifetimes. Suggestions for the reporting of detailed stress factors, photovoltaic parameters with sufficient statistical weight, and new figures of merit are made with the goal of steepening the learning curve towards real applications. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


  • Vertically Aligned ZnO/Inx S y Core-Shell Nanorods for High Efficient Dye-Sensitized Solar Cells

    Gonzalez-Valls I., Ballesteros B., Lira-Cantu M. Nano; 10 (7, 1550103) 2015. 10.1142/S1793292015501039. IF: 1.090

    Innovative vertically aligned ZnO/InxSy nanorod (NR) electrodes were prepared by successive ion layer adsorption and reaction (SILAR) technique. The InxSy shell layer was deposited on top of ZnO NR electrodes of two different lengths, ~1.6 μm and ~3.2 μm. Two sulfur contents on the InxSy shell layer with different layer thicknesses were analyzed. These electrodes were fully characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), Energy-dispersive x-ray spectroscopy (EDS), Infrared spectroscopy (FT-IR), x-ray photoelectron spectroscopy (XPS) and ultraviolet photoemission spectroscopy (UPS) and then applied in dye-sensitized solar cells (DSC). Power conversion efficiency of 2.32% was observed when a low-sulfur content InxSy shell layer was applied in comparison to the stoichiometric In2S3 shell layer (0.21%) or the bare ZnO NRs (0.87%). In the case of low sulfur content, a shell layer of In(OH)xSy or/and In(OH)3 is formed as observed by the presence of-OH observed by FTIR analyses. The presence of higher amounts of hydroxide groups modifies the bandgap and work function of the InxSy shell and facilitates dye adsorption, increasing the final solar cell performance. © 2015 World Scientific Publishing Company. © 2015 World Scientific Publishing Company.


2014

  • Solution processable titanium dioxide precursor and nanoparticulated ink: Application in Dye Sensitized Solar Cells

    Bosch-Jimenez, P.; Yu, Y.; Lira-Cantu, M.; Domingo, C.; Ayllón, J.A. Journal of Colloid and Interface Science; 416: 112 - 118. 2014. 10.1016/j.jcis.2013.11.013. IF: 3.552


  • Worldwide outdoor round robin study of organic photovoltaic devices and modules

    Madsen, M.V.; Gevorgyan, S.A.; Pacios, R.; Ajuria, J.; Etxebarria, I.; Kettle, J.; Bristow, N.D.; Neophytou, M.; Choulis, S.A.; Stolz Roman, L.; Yohannes, T.; Cester, A.; Cheng, P.; Zhan, X.; Wu, J.; Xie, Z.; Tu, W.-C.; He, J.-H.; Fell, C.J.; Anderson, K.; Hermenau, M.; Bartesaghi, D.; Jan Anton Koster, L.; Machui, F.; González-Valls, I.; Lira-Cantu, M.; Khlyabich, P.P.; Thompson, B.C.; Gupta, R.; Shanmugam, K.; Kulkarni, G.U.; Galagan, Y.; Urbina, A.; Abad, J.; Roesch, R.; Hoppe, H.; Morvillo, P.; Bobeico, E.; Panaitescu, E.; Menon, L.; Luo, Q.; Wu, Z.; Ma, C.; Hambarian, A.; Melikyan, V.; Hambsch, M.; Burn, P.L.; Meredith, P.; Rath, T.; Dunst, S.; Trimmel, G.; Bardizza, G.; Müllejans, H.; Goryachev, A.E.; Misra, R.K.; Katz, E.A.; Takagi, K.; Magaino, S.; Saito, H.; Aoki, D.; Sommeling, P.M.; Kroon, J.M.; Vangerven, T.; Manca, J.; Kesters, J.; Maes, W.; Bobkova, O.D.; Trukhanov, V.A.; Paraschuk, D.Y.; Castro, F.A.; Blakesley, J.; Tuladhar, S.M.; Alexander Röhr, J.; Nelson, J.; Xia, J.; Parlak, E.A.; Tumay, T.A.; Egelhaaf, H.-J.; Tanenbaum, D.M.; Mae Ferguson, G.; Carpenter, R.; Chen, H.; Zimmermann, B.; Hirsch, L.; Wantz, G.; Sun, Z.; Singh, P.; Bapat, C.; Offermans, T.; Krebs, F.C. Solar Energy Materials and Solar Cells; 130: 281 - 290. 2014. 10.1016/j.solmat.2014.07.021. IF: 5.030


2013

  • A facile low temperature synthesis of TiO2 nanorods for high efficiency dye sensitized solar cells

    Shalan, A.E.; Rashad, M.M.; Yu, Y.; Lira-Cantú, M.; Abdel-Mottaleb, M.S.A. Applied Physics A; 110: 111 - 122. 2013. 10.1007/s00339-012-7368-6. IF: 1.545


  • Comparison of two types of vertically aligned ZnO NRs for highly efficient polymer solar cells

    Gonzalez-Valls, I.; Angmo, D.; Gevorgyan, S.A.; Sebastián Reparaz, J.; Krebs, F.C.; Lira-Cantu, M. Journal of Polymer Science, Part B: Polymer Physics; 51: 272 - 280. 2013. 10.1002/polb.23214. IF: 2.221


  • Controlling the microstructure and properties of titania nanopowders for high efficiency dye sensitized solar cells

    Shalan, A.E.; Rashad, M.M.; Yu, Y.; Lira-Cantú, M.; Abdel-Mottaleb, M.S.A. Electrochimica Acta; 89: 469 - 478. 2013. 10.1016/j.electacta.2012.11.091. IF: 3.777


  • Low-cost upscaling compatibility of five different ITO-free architectures for polymer solar cells

    Angmo, D.; Gonzalez-Valls, I.; Veenstra, S.; Verhees, W.; Sapkota, S.; Schiefer, S.; Zimmermann, B.; Galagan, Y.; Sweelssen, J.; Lira-Cantu, M.; Andriessen, R.; Kroon, J.M.; Krebs, F.C. Journal of Applied Polymer Science; 130: 944 - 954. 2013. 10.1002/app.39200. IF: 1.395


  • Low-temperature, solution-processed, layered V2O5 hydrate as the hole-transport layer for stable organic solar cells

    Terán-Escobar, G.; Pampel, J.; Caicedo, J.M.; Lira-Cantú, M. Energy and Environmental Sciences; 6 (10): 3088 - 3098. 2013. 10.1039/c3ee42204f. IF: 11.653


  • Synthesis and characterization of mesoporous anatase TiO2 nanostructures via organic acid precursor process for dye-sensitized solar cells applications

    Rashad, M.M.; Shalan, A.E.; Lira-Cantú, M.; Abdel-Mottaleb, M.S.A. Journal of Industrial and Engineering Chemistry; 19: 2052 - 2059. 2013. 10.1016/j.jiec.2013.03.021. IF: 2.145


2012

  • Combined characterization techniques to understand the stability of a variety of organic photovoltaic devices - The ISOS-3 interlaboratory collaboration

    Lira-Cantu, M.; Tanenbaum, D.M.; Norrman, K.; Voroshazi, E.; Hermenau, M.; Lloyd, M.T.; Teran-Escobar, G.; Galagan, Y.; Zimmermann, B.; Hösel, M.; Dam, H.F.; Jørgensen, M.; Gevorgyan, S.; Lutsen, L.; Vanderzande, D.; Hoppe, H.; Rösch, R.; Würfel, U.; Andriessen, R.; Rivaton, A.; Uzunoglu, G.Y.; Germack, D.; Andreasen, B.; Madsen, M.V.; Bundgaard, E.; Krebs, F.C. Proceedings of SPIE - The International Society for Optical Engineering; 8472: 847203. 2012. doi:10.1117/12.929579.


  • Enhanced light extraction in ITO-free OLEDs using double-sided printed electrodes

    Reboud, V.; Khokhar, A.Z.; Sepúlveda, B.; Dudek, D.; Kehoe, T.; Cuffe, J.; Kehagias, N.; Lira-Cantu, M.; Gadegaard, N.; Grasso, V.; Lambertini, V.; Sotomayor Torres, C.M. Nanoscale; 4 (11): 3495 - 3500. 2012. .


  • Hydrothermal synthesis of 1D TiO2 nanostructures for dye sensitized solar cells

    Tacchini, I.; Ansón-Casaos, A.; Yu, Y.; Martínez, M.T.; Lira-Cantu, M. Materials Science & Engineering B: Solid-State Materials for Advanced Technology; 177: 19 - 26. 2012. 10.1016/j.mseb.2011.09.024.


  • Investigation of the degradation mechanisms of a variety of organic photovoltaic devices by combination of imaging techniques - The ISOS-3 inter-laboratory collaboration

    Rösch, R.; Tanenbaum, D.M.; Jørgensen, M.; Seeland, M.; Bärenklau, M.; Hermenau, M.; Voroshazi, E.; Lloyd, M.T.; Galagan, Y.; Zimmermann, B.; Würfel, U.; Hösel, M.; Dam, H.F.; Gevorgyan, S.A.; Kudret, S.; Maes, W.; Lutsen, L.; Vanderzande, D.; Andriessen, R.; Teran-Escobar, G.; Lira-Cantu, M.; Rivaton, A.; Uzunoglu, G.Y.; Germack, D.; Andreasen, B.; Madsen, M.V.; Norrman, K.; Hoppe, H.; Krebs, F.C. Energy and Environmental Sciences; 5: 6521 - 6540. 2012. 10.1039/c2ee03508a.


  • New D-Ï€-A-conjugated organic sensitizers based on 4 H-pyran-4-ylidene donors for highly efficient dye-sensitized solar cells

    Franco, S.; Garín, J.; Martínez De Baroja, N.; Pérez-Tejada, R.; Orduna, J.; Yu, Y.; Lira-Cantú, M. Organic Letters; 14: 752 - 755. 2012. 10.1021/ol203298r.


  • On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses - The ISOS-3 inter-laboratory collaboration

    Teran-Escobar, G.; Tanenbaum, D.M.; Voroshazi, E.; Hermenau, M.; Norrman, K.; Lloyd, M.T.; Galagan, Y.; Zimmermann, B.; Hösel, M.; Dam, H.F.; Jorgensen, M.; Gevorgyan, S.; Kudret, S.; Maes, W.; Lutsen, L.; Vanderzande, D.; Würfel, U.; Andriessen, R.; Rösch, R.; Hoppe, H.; Rivaton, A.; Uzunoglu, G.Y.; Germack, D.; Andreasen, B.; Madsen, M.V.; Bundgaard, E.; Krebs, F.C.; Lira-Cantu, M. Physical Chemistry Chemical Physics; 14: 11824 - 11845. 2012. 10.1039/c2cp40821j.


  • Solution processable TiO 2 nanoparticles capped with lauryl gallate

    Bosch-Jimenez, P.; Lira-Cantu, M.; Domingo, C.; Ayllón, J.A. Materials Letters; 89: 296. 2012. .


  • Stability and degradation of organic photovoltaics fabricated, aged, and characterized by the ISOS 3 inter-laboratory collaboration

    Tanenbaum, D.M.; Hermenau, M.; Voroshazi, E.; Lloyd, M.T.; Galagan, Y.; Zimmermann, B.; Hösel, M.; Dam, H.F.; Jørgensen, M.; Gevorgyan, S.; Kudret, S.; Maes, W.; Lutsen, L.; Vanderzande, D.; Würfel, U.; Andriessen, R.; Rösch, R.; Hoppe, H.; Lira-Cantu, M.; Teran-Escobar, G.; Dupuis, A.; Bussière, P.O.; Rivaton, A.; Uzunoglu, G.Y.; Germack, D.; Andreasen, B.; Madsen, M.V.; Norrman, K.; Bundgaard, E.; Krebs, F.C. Proceedings of SPIE - The International Society for Optical Engineering; 8477: 847704. 2012. doi:10.1117/12.930451 .


  • The ISOS-3 inter-laboratory collaboration focused on the stability of a variety of organic photovoltaic devices

    Tanenbaum, D.M.; Hermenau, M.; Voroshazi, E.; Lloyd, M.T.; Galagan, Y.; Zimmermann, B.; Hösel, M.; Dam, H.F.; Jørgensen, M.; Gevorgyan, S.A.; Kudret, S.; Maes, W.; Lutsen, L.; Vanderzande, D.; Würfel, U.; Andriessen, R.; Rösch, R.; Hoppe, H.; Teran-Escobar, G.; Lira-Cantu, M.; Rivaton, A.; Uzunolu, G.Y.; Germack, D.; Andreasen, B.; Madsen, M.V.; Norrman, K.; Krebs, F.C. RSC Advances; 2: 882 - 893. 2012. 10.1039/c1ra00686j.


  • The use of polyurethane as encapsulating method for polymer solar cells - An inter laboratory study on outdoor stability in 8 countries

    Sÿndergaard R.R.; Makris, T.; Lianos, P.; Manor, A.; Katz, E.A.; Gong, W.; Tuladhar, S.M.; Nelson, J.; Tuomi, R.; Sommeling, P.; Veenstra, S.C.; Rivaton, A.; Dupuis, A.; Teran-Escobar, G.; Lira-Cantu, M.; Sapkota, S.B.; Zimmermann, B.; Wÿrfel, U.; Matzarakis, A.; Krebs, F.C. Solar Energy Materials and Solar Cells; 99: 292. 2012. .


  • TOF-SIMS investigation of degradation pathways occurring in a variety of organic photovoltaic devices - The ISOS-3 inter-laboratory collaboration

    Andreasen, B.; Tanenbaum, D.M.; Hermenau, M.; Voroshazi, E.; Lloyd, M.T.; Galagan, Y.; Zimmernann, B.; Kudret, S.; Maes, W.; Lutsen, L.; Vanderzande, D.; Würfel, U.; Andriessen, R.; Rösch, R.; Hoppe, H.; Teran-Escobar, G.; Lira-Cantu, M.; Rivaton, A.; Uzunoglu, G.Y.; Germack, D.S.; Hösel, M.; Dam, H.F.; Jorgensen, M.; Gevorgyan, S.A.; Madsen, M.V.; Bundgaard, E.; Krebs, F.C.; Norrman, K. Physical Chemistry Chemical Physics; 14: 11780 - 11799. 2012. 10.1039/c2cp41787a.


2011

  • A clean low-temperature ZnO deposition method for multipurpose applications

    Estruga, M.; Gonzalez-Valls, I.; Domingo, C.; Lira-Cantu, M.; Ayllón, J.A. European Journal of Inorganic Chemistry; : 821 - 825. 2011. 10.1002/ejic.201000966.


  • Aligned TiO2 nanocolumnar layers prepared by PVD-GLAD for transparent dye sensitized solar cells

    González-García, L.; González-Valls, I.; Lira-Cantu, M.; Barranco, A.; González-Elipe, A.R. Energy and Environmental Sciences; 4: 3426 - 3435. 2011. 10.1039/c0ee00489h.


  • An inter-laboratory stability study of roll-to-roll coated flexible polymer solar modules

    Gevorgyan, S.A.; Medford, A.J.; Bundgaard, E.; Sapkota, S.B.; Schleiermacher, H.-F.; Zimmermann, B.; Würfel, U.; Chafiq, A.; Lira-Cantu, M.; Swonke, T.; Wagner, M.; Brabec, C.J.; Haillant, O.; Voroshazi, E.; Aernouts, T.; Steim, R.; Hauch, J.A.; Elschner, A.; Pannone, M.; Xiao, M.; Langzettel, A.; Laird, D.; Lloyd, M.T.; Rath, T.; Maier, E.; Trimmel, G.; Hermenau, M.; Menke, T.; Leo, K.; Rösch, R.; Seeland, M.; Hoppe, H.; Nagle, T.J.; Burke, K.B.; Fell, C.J.; Vak, D.; Singh, T.B.; Watkins, S.E.; Galagan, Y.; Manor, A.; Katz, E.A.; Kim, T.; Kim, K.; Sommeling, P.M.; Verhees, W.J.H.; Veenstra, S.C.; Riede, M.; Greyson Christoforo, M.; Currier, T.; Shrotriya, V.; Schwartz, G.; Krebs, F.C. Solar Energy Materials and Solar Cells; 95: 1398 - 1416. 2011. 10.1016/j.solmat.2011.01.010.


  • Oxide/polymer interfaces for hybrid and organic solar cells: Anatase vs. Rutile TiO2

    Lira-Cantu, M.; Chafiq, A.; Faissat, J.; Gonzalez-Valls, I.; Yu, Y. Solar Energy Materials and Solar Cells; 95: 1362 - 1374. 2011. 10.1016/j.solmat.2010.12.028.


  • Synthesis conditions, light intensity and temperature effect on the performance of ZnO nanorods-based dye sensitized solar cells

    Gonzalez-Valls, I.; Yu, Y.; Ballesteros, B.; Oro, J.; Lira-Cantu, M. Journal of Power Sources; 196: 6609 - 6621. 2011. 10.1016/j.jpowsour.2011.03.063.


2010

  • Dye sensitized solar cells based on vertically-aligned ZnO nanorods: Effect of UV light on power conversion efficiency and lifetime

    Gonzalez-Valls, I.; Lira-Cantu, M. Energy and Environmental Sciences; 3: 789 - 795. 2010. 10.1039/b922354a.


  • Nb-TiO2/polymer hybrid solar cells with photovoltaic response under inert atmosphere conditions

    Lira-Cantu, M.; Khoda Siddiki, M.; Muñoz-Rojas, D.; Amade, R.; González-Pech, N.I. Solar Energy Materials and Solar Cells; 94: 1227 - 1234. 2010. 10.1016/j.solmat.2010.03.011.


  • Titanium dioxide/amine hybrid nanotubes. Optical properties and behavior as lithium-ion electrode

    Vasquez, J; López, Z; Zuñiga, A; Nacher, A; Lira-Cantú, M; Gómez-Romero, P; Ana, M.A.S; Benavente, E; González, G. Electrochimica Acta; 55 (4): 1373 - 1379. 2010. 10.1016/j.electacta.2009.05.010.


2009

  • A round robin study of flexible large-area roll-to-roll processed polymer solar cell modules

    Monica Lira-Cantu; ichael Gratzel; Panagiotis Lianos; Eugene A. Katz; Wolfgang Lohwasser; Bertrand Jannon et al. Solar Energy Materials and Solar Cells; 2009. .


  • Application of MEH-PPV/SnO2 bilayer as hybrid solar cell

    Ayllon, J.A.; Lira-Cantu, M. Applied Physics A; 95: 249 - 255. 2009. 10.1007/s00339-008-5023-z.


  • High-Yield preparation of titanium dioxide nanostructures by hydrothermal conditions

    Vasquez, J; Lozano, H; Lavayen, V; Lira-Cantu, M; Gomez-Romero, P; Ana, M.A.S; Benavente, E; Gonzalez, G. Journal of Nanoscience and Nanotechnology; 9 (2): 1103 - 1107. 2009. 10.1166/jnn.2009.C097.


  • Neural cell growth on TiO2 anatase nanostructured surfaces

    Collazos-Castro, J.E.; Cruz, A.M.; Carballo-Vila, M.; Lira-Cantú, M.; Abad, L.; del Pino, Á.P.; Fraxedas, J.; San Juan, A.; Fonseca, C.; Pêgo, A.P.; Casañ-Pastor, N. Thin Solid Films; 518: 160 - 170. 2009. 10.1016/j.tsf.2009.06.048.


  • Vertically-aligned nanostructures of ZnO for excitonic solar cells: A review

    Gonzalez-Valls, I.; Lira-Cantu, M. Energy and Environmental Sciences; 2: 19 - 34. 2009. 10.1039/b811536b.


2008

  • Conjugated polymers as part of multifunctional organic/inorganic hybrid materials for photovoltaic applications Symposium on Organic-Inorganic Hybrid Materials, Apr 9-13, 2007 San Francisco, USA Source: ORGANIC/INORGANIC HYBRID MATERIALS - 2007 Book Series: MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS

    Lira-Cantu, M.; Krebs, F.C.; Gomez-Romero, P.; Yanagida, S. Materials Research Society Symposium - Proceedings; 1007: 249 - 257. 2008. .


  • Influence of doped anions on poly(3,4-ethylenedioxythiophene) as hole conductors for iodine-free solid-state dye-sensitized solar cells

    Xia, J.; Masaki, N.; Lira-Cantu, M.; Kim, Y.; Jiang, K.; Yanagida, S. Journal of the American Chemical Society; 130: 1258 - 1263. 2008. 10.1021/ja075704o.


  • Solid-state dye-sensitized TiO2 solar cells using poly(3,4-ethylenedioxythiophene) as substitutes of iodine/iodide electrolytes and noble metal catalysts on FTO counter electrodes

    Kim, Y.; Sung, Y.-E.; Xia, J.-B.; Lira-Cantu, M.; Masaki, N.; Yanagida, S. Journal of Photochemistry and Photobiology A: Chemistry; 193: 77 - 80. 2008. 10.1016/j.jphotochem.2007.06.009.


2007

  • Improvement in the Ppy/V2O5 hybrid as a cathode material for Li ion batteries using PSA as an organic additive

    Boyano, I.; Bengoechea, M.; de Meatza, I.; Miguel, O.; Cantero, I.; Ochoteco, E.; Rodríguez, J.; Lira-Cantú, M.; Gómez-Romero, P. Journal of Power Sources; 166: 471 - 477. 2007. 10.1016/j.jpowsour.2006.12.106.


  • Influence of acids in the Ppy/V2O5 hybrid synthesis and performance as a cathode material

    Boyano, I.; Bengoechea, M.; de Meatza, I.; Miguel, O.; Cantero, I.; Ochoteco, E.; Grande, H.; Lira-Cantú, M.; Gomez-Romero, P.; Gómez-Romero, P. Journal of Power Sources; 174: 1206 - 1211. 2007. 10.1016/j.jpowsour.2007.06.175.


2006

  • Ionic and electronic conductivity of 5% Ca-Doped GdNbO4

    Haugsrud, R.; Ballesteros, B.; Lira-Cantú, M.; Norby, T. Journal of the Electrochemical Society; 153: J87 - J90. 2006. 10.1149/1.2203933.


  • Oxygen release and exchange in niobium oxide MEHPPV hybrid solar cells

    Lira-Cantu, M.; Norrman, K.; Andreasen, J.W.; Krebs, F.C. Chemistry of Materials; 18: 5684 - 5690. 2006. 10.1021/cm061429d.


2005

  • Hybrid materials approach in the design of electrodes and electrolytes for energy storage and conversion

    Cuentas-Gallegos, K.; Lira-Cantú, M.; Casañ-Pastor, N.; Asensio, J.A.; Gómez-Romero, P. Materials Research Society Symposium - Proceedings; 847 (Article number EE12.4): 431 - 438. 2005. .


2004

  • Hybrid materials based on Vanadyl Phosphate and Conducting Polymers as Cathodes in Rechargeable Lithium Cells.

    A. Karina Cuentas-Gallegos; R. Vijayaraghavan; Mónica Lira-Cantú; Nieves Casañ-Pastor; Pedro Gómez-Romero Boletin de la Sociedad Espanola de Ceramica y Vidrio; 43 (2): 429 - 433. 2004. .