Cesium Doping for Performance Improvement of Lead(II)-acetate-Based Perovskite Solar Cells
- Authors
- Han, Min-Seok; Liu, Z.; Liu, X.; Yoon, Jinho; Lee, Eun-Cheol
- Issue Date
- Jan-2021
- Publisher
- MDPI
- Keywords
- Cesium doping; Lead acetate; Performance improvement; Perovskite solar cells
- Citation
- MATERIALS, v.14, no.2, pp.1 - 9
- Journal Title
- MATERIALS
- Volume
- 14
- Number
- 2
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/79958
- DOI
- 10.3390/ma14020363
- ISSN
- 1996-1944
- 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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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