Han Min-Seok, Liu Zhihai, Liu Xuewen, Yoon Jinho, Lee Eun-Cheol
Department of Nano Science and Technology, Graduate School, Gachon University, Gyeonggi 13120, Korea.
School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China.
Materials (Basel). 2021 Jan 13;14(2):363. doi: 10.3390/ma14020363.
Lead(II)-acetate (Pb(Ac)) 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)-based perovskite solar cells (PSCs). We demonstrate that the quality of the CHNHPbI 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)-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)-based PSCs.
醋酸铅（Pb(Ac)）是制备有机铅三卤化物钙钛矿材料的一种很有前景的铅源，它避免了使用不便的反溶剂处理。在本研究中，我们研究了铯掺杂对基于Pb(Ac)的钙钛矿太阳能电池（PSC）性能的影响。我们证明，通过向钙钛矿中掺杂5 mol%的铯，CHNHPbI钙钛矿薄膜的质量得到了改善，结晶度提高，针孔减少。结果，PSC的功率转换效率（PCE）从14.1%提高到了15.57%（平均），这主要是由短路电流密度和填充因子的显著提高引起的。铯掺杂的基于Pb(Ac)的PSC的冠军器件实现了18.02%的PCE，滞后可忽略不计，输出稳定。我们的结果表明，铯掺杂是提高基于Pb(Ac)的PSC性能的有效方法。
