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

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

doi:10.1063/1.5063793

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

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

1 Citation (Scopus)

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 language	English
Article number	212103
Journal	Applied Physics Letters
Volume	113
Issue number	21
DOIs	https://doi.org/10.1063/1.5063793
Publication status	Published - 2018 Nov 19

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open circuit voltage

solar cells

low voltage

conduction bands

density functional theory

electrons

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Cite this

Park, J. S., Kim, S., Hood, S. N., & Walsh, A. (2018). Open-circuit voltage deficit in Cu₂ZnSnS₄ solar cells by interface bandgap narrowing. Applied Physics Letters, 113(21), [212103]. https://doi.org/10.1063/1.5063793

Park, Ji Sang ; Kim, Sunghyun ; Hood, Samantha N. ; Walsh, Aron. / Open-circuit voltage deficit in Cu₂ZnSnS₄ solar cells by interface bandgap narrowing. In: Applied Physics Letters. 2018 ; Vol. 113, No. 21.

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Park, JS, Kim, S, Hood, SN & Walsh, A 2018, 'Open-circuit voltage deficit in Cu₂ZnSnS₄ solar cells by interface bandgap narrowing', Applied Physics Letters, vol. 113, no. 21, 212103. https://doi.org/10.1063/1.5063793

Open-circuit voltage deficit in Cu₂ZnSnS₄ solar cells by interface bandgap narrowing. / Park, Ji Sang; Kim, Sunghyun; Hood, Samantha N.; Walsh, Aron.

In: Applied Physics Letters, Vol. 113, No. 21, 212103, 19.11.2018.

Research output: Contribution to journal › Article

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Park JS, Kim S, Hood SN, Walsh A. Open-circuit voltage deficit in Cu₂ZnSnS₄ solar cells by interface bandgap narrowing. Applied Physics Letters. 2018 Nov 19;113(21). 212103. https://doi.org/10.1063/1.5063793

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10.1063/1.5063793