Stabilizing perovskite-substrate interfaces for high-performance perovskite modules

Chen, Shangshang; Dai, Xuezeng; Xu, Shuang; Jiao, Haoyang; Zhao, Liang; Huang, Jinsong

doi:10.1126/science.abi6323

Stabilizing perovskite-substrate interfaces for high-performance perovskite modules

Journal Article · Thu Aug 19 00:00:00 EDT 2021 · Science

DOI:https://doi.org/10.1126/science.abi6323· OSTI ID:1822475

^[1]; ^[1]; Xu, Shuang ^[1]; Jiao, Haoyang ^[1]; Zhao, Liang ^[1]; ^[1]

Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC 27599, USA.

The interfaces of perovskite solar cells (PSCs) are important in determining their efficiency and stability, but the morphology and stability of imbedded perovskite-substrate interfaces have received less attention than have top interfaces. We found that dimethyl sulfoxide (DMSO), which is a liquid additive broadly applied to enhance perovskite film morphology, was trapped during film formation and led to voids at perovskite-substrate interfaces that accelerated the film degradation under illumination. Partial replacement of DMSO with solid-state carbohydrazide reduces interfacial voids. A maximum stabilized power conversion efficiency (PCE) of 23.6% was realized for blade-coated p-type/intrinsic/n-type (p-i-n) structure PSCs with no efficiency loss after 550-hour operational stability tests at 60°C. The perovskite mini-modules showed certified PCEs of 19.3 and 19.2%, with aperture areas of 18.1 and 50.0 square centimeters, respectively.

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Sponsoring Organization:: USDOE

OSTI ID:: 1822475

Journal Information:: Science, Journal Name: Science Journal Issue: 6557 Vol. 373; ISSN 0036-8075

Publisher:: American Association for the Advancement of Science (AAAS)Copyright Statement

Country of Publication:: United States

Language:: English

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