BEGIN:VCALENDAR PRODID:-//eluceo/ical//2.0/EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT UID:594ad2da-185e-4934-81a9-c3d553def93d DTSTAMP:20261028T114046Z SUMMARY:Advanced TEM studies of earth-abundant materials for next-generatio n sustainable energy technologies DESCRIPTION:

PhD: Francesco Salutari

Dir ectors:

ICREA Prof. Jordi Arbiol\, \;Group Leader of the Advanced Electron Nanoscopy \;group at Institut Català de Nanociència i Nanotecnologia (ICN2)

Prof Maria Chiara Spadaro\, \;Vi siting Professor at ICN2 \;

Short Abstract: \;This thesis presents a detailed TEM study of earth-abundant materials \, primarily Zn₃P₂ and SnSe\, for photovoltaic and t hermoelectric applications\, respectively. We begin by studying Zn_{3P₂ grown epitaxially on InP substrates by metal-organic vap
or-phase epitaxy (MOVPE)\, both in the form of nanowires and thin films. R
esults from structural and compositional characterization position MOVPE a
s a viable alternative to molecular beam epitaxy (MBE) for the scalable pr
oduction of Zn₃P₂-based photovoltaic devices. Next\,
we address the structural characterization of extended intrinsic defects
across a broad set of MBE- and MOCVD-grown Zn₃P₂ sam
ples. We show that defect-free material is unattainable through convention
al growth\, albeit DFT calculations evidence an almost unperturbed optoele
ctronic response in relation to intrinsic defects. Finally\, we investigat
e the dielectric response and band gap of polycrystalline SnSe doped with
Na for thermoelectric applications via valence EELS. We find band gap narr
owing at grain boundaries in the presence of Na.}

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DTSTART:20261021T123000 DTEND:20261021T215959 LOCATION:ICN2 Seminar Room CATEGORIES:ICN2 Theses Defence END:VEVENT END:VCALENDAR