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Wednesday, 04 September 2013

Low-temperature, all solution-processed Organic Solar Cells stable for more than 1000 h.

Reporting in Energy & Environmental Science, ICN2 researchers apply a new water-based hole-transport material suitable for solution processing roll-to-roll fabrication for highly stable Organic Solar Cells

Researchers at ICN2 have just published an article in Energy & Environmental Science describing the synthesis and optimization of a water-based hole transport layer for Organic Solar Cells (OSCs). The article entitled “Low-temperature, solution-processed, layered V2O5 hydrate as the hole-transport layer for stable organic solar cells” shows the application of a new transition metal oxide (TMO) suitable for Organic Photovoltaics. The work was led by ICN2 Group Leader Dr. Monica Lira-Cantu, postdoc Dr. Jose Caicedo-Roque and PhD student Gerardo Teran-Escobar.

The thin film oxide, a layered V2O5 hydrate, has been obtained and directly processed from a water-based solution at low temperature. It permits the fabrication of solar cells applying only Ag metal electrodes, eliminating the need of highly reactive and less stable Al electrodes. Outdoor stability analyses, carried out at the ICN2 outdoor testing station (see image), of sealed devices revealed highly stable devices that maintain their efficiency for more than 1000 h.

This work is a step forwards the elimination of undesirable high-cost and environmental unfriendly organic solvents reducing, at the same time, the energy payback time of Next-generation Organic Solar Cells.

To read the article “Low-temperature, solution-processed, layered V2O5 hydrate as the hole-transport layer for stable organic solar cells”, click here.