II–IV–V2 and III–III–V2 Polytypes as Light Absorbers for Single Junction and Tandem Photovoltaic Devices

Mohnish Pandey, Korina Kuhar, Karsten Wedel Jacobsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Recent experiments on II–IV–V2 type nitrides and phosphides have shown that these materials are potential candidates as photovoltaic absorbers. The materials space for such light absorbers can be expanded by elemental substitution of the different species,and thanks to the small energy difference of the polymorphs, the space can be extended by tuning the atomic structure as well. Using electronic structure calculations, we explore chalcopyrite, kesterite, and wurtzite polymorphs of II–IV–V2 and III–III–V2 materials for light absorption especially in the visiblerange. Based on the thermodynamic stability, band gap, and charge carrier effective masses, we discuss the posssibility for the materials containing nontoxic elements to act as PV absorbers. Additionally,the systematic mapping of the materials space provides trends in thermodynamic and electronic properties which can be exploited further to tune these properties via elemental substitution and/or alloying.
Original languageEnglish
JournalJournal of Physical Chemistry C
Volume121
Issue number33
Pages (from-to)17780−17786
Number of pages7
ISSN1932-7447
DOIs
Publication statusPublished - 2017

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