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Cesium Doping for Performance Improvement of Lead(II)-acetate-Based Perovskite Solar Cells.

ABSTRACT: Lead(II)-acetate (Pb(Ac)₂) is a promising lead source for the preparation of organolead trihalide perovskite materials, which avoids the use of inconvenient anti-solvent treatment. In this study, we investigated the effect of cesium doping on the performance of Pb(Ac)₂-based perovskite solar cells (PSCs). We demonstrate that the quality of the CH₃NH₃PbI₃ perovskite film was improved with increased crystallinity and reduced pinholes by doping the perovskite with 5 mol% cesium. As a result, the power conversion efficiency (PCE) of the PSCs was improved from 14.1% to 15.57% (on average), which was mainly induced by the significant enhancements in short-circuit current density and fill factor. A PCE of 18.02% was achieved for the champion device of cesium-doped Pb(Ac)₂-based PSCs with negligible hysteresis and a stable output. Our results indicate that cesium doping is an effective approach for improving the performance of Pb(Ac)₂-based PSCs.

SUBMITTER: Han MS

PROVIDER: S-EPMC7828501 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Cesium Doping for Performance Improvement of Lead(II)-acetate-Based Perovskite Solar Cells.

Han Min-Seok MS Liu Zhihai Z Liu Xuewen X Yoon Jinho J Lee Eun-Cheol EC

Materials (Basel, Switzerland) 20210113 2

Lead(II)-acetate (Pb(Ac)2) is a promising lead source for the preparation of organolead trihalide perovskite materials, which avoids the use of inconvenient anti-solvent treatment. In this study, we investigated the effect of cesium doping on the performance of Pb(Ac)2-based perovskite solar cells (PSCs). We demonstrate that the quality of the CH3NH3PbI3 perovskite film was improved with increased crystallinity and reduced pinholes by doping ...[more]

PMID: 33451029

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