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arXiv · 1811.01867

Open-Circuit Voltage Deficit in Cu2ZnSnS4 Solar Cells by Interface Band Gap 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 Cu2ZnSnSe4/CdS interface, consistent with a lower open-circuit voltage deficit.

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Ji-Sang Park, Sunghyun Kim, Samantha N. Hood, Aron Walsh. 2018-11-10. Open-Circuit Voltage Deficit in Cu2ZnSnS4 Solar Cells by Interface Band Gap Narrowing. https://doi.org/10.1063/1.5063793

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