Sb2Se3: a possible future for thin-film photovoltaics?
Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Universit`a di Parma Parma, Italy
Istituto dei Materiali per l’Elettronica ed il Magnetismo, CNR Parma, Italy
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Published online: 22 November 2022
Antimony selenide (Sb2Se3) is today one of the most promising alternative materials for p-type absorbers in thin-film photovoltaics, with an optimal band-gap and a very high absorption coeﬃcient. However, its crystal structure is extremely anisotropic and its natural carrier density is generally very low. Sb2Se3 thin films have been deposited by two diﬀerent high-energy techniques: magnetron RF-sputtering (MS) and low-temperature pulsed electron deposition (LT-PED). Their dominant crystallographic orientations have been studied as a function of deposition parameters and of the diﬀerent used substrates, while complete solar cells have been subsequently made with the obtained samples to confirm the dependence of conversion eﬃciencies on the observed (Sb4Se6)n ribbon orientation. Cu-doped Sb2Se3 thin-films have been also preliminary prepared in order to evaluate a possible route to further improve the free charge-carrier density and the cell performance.
© The Authors, published by EDP Sciences, 2022
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