Open-circuit voltage deficit in Cu2ZnSnS4 solar cells by interface bandgap narrowing

Ji Sang Park, Sunghyun Kim, Samantha N. Hood, Aron Walsh

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Abstract

There is evidence that interface recombination in Cu2ZnSnS4 solar cells contributes to the open-circuit voltage deficit. Our hybrid density functional theory calculations suggest that electron-hole recombination at the Cu2ZnSnS4/CdS interface is caused by a deeper conduction band that slows electron extraction. In contrast, the bandgap is not narrowed for the Cu2ZnSnS4/CdS interface, consistent with a lower open-circuit voltage deficit.

Original languageEnglish
Article number212103
JournalApplied Physics Letters
Volume113
Issue number21
DOIs
Publication statusPublished - 2018 Nov 19

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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