Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Surface Passivation of All‐Inorganic CsPbI2Br with a Fluorinated Organic Ammonium Salt for Perovskite Solar Cells with Efficiencies over 16%
Solar RRL ( IF 6.0 ) Pub Date : 2020-07-28 , DOI: 10.1002/solr.202000321 Shan-Ci Chen 1 , Di Wang 1, 2 , Qingdong Zheng 1
Solar RRL ( IF 6.0 ) Pub Date : 2020-07-28 , DOI: 10.1002/solr.202000321 Shan-Ci Chen 1 , Di Wang 1, 2 , Qingdong Zheng 1
Affiliation
|
Surface modification is demonstrated as an efficient strategy to enhance the efficiency and stability of perovskite solar cells (PVSCs). Fluorinated organic ammonium salts featuring a strong hydrophobic nature are seldom used as passivation agents for the surface modification of CsPbI2Br perovskites. Herein, a fluorinated organic ammonium halide salt, 4‐trifluoromethyl phenethylammonium iodide (CFPEAI), is incorporated into the surface of CsPbI2Br perovskite for the first time. After the CFPEAI modification, the defects of CsPbI2Br perovskite are significantly passivated with reduced trap densities. The best‐performance PVSC with CFPEAI modification shows an excellent power conversion efficiency (PCE) of 16.07% with a high fill factor (FF) of 84.65%, a short‐circuit current density (JSC) of 15.45 mA cm−2, and an open‐circuit voltage (VOC) of 1.23 V. In contrast, the control PVSCs without the surface modification exhibit a lower PCE of 14.50% with a FF of 80.56%, a JSC of 15.05 mA cm−2, and a VOC of 1.20 V. With CFPEAI passivation, the CsPbI2Br perovskite film exhibits enhanced hydrophobicity, thereby leading to improved stability for the corresponding PVSC in comparison with the control PVSC without any surface modification.
中文翻译：
全无机CsPbI2Br与氟化有机铵盐的表面钝化，用于钙钛矿型太阳能电池，效率超过16％
表面改性被证明是提高钙钛矿太阳能电池（PVSC）效率和稳定性的有效策略。具有强疏水性的氟化有机铵盐很少用作CsPbI 2 Br钙钛矿表面改性的钝化剂。本文首次将氟化有机卤化铵盐4-碘代三氟甲基苯乙铵（CFPEAI）掺入CsPbI 2 Br钙钛矿表面。CFPEAI改性后，CsPbI 2的缺陷钙钛矿被钝化，陷阱密度降低。经过CFPEAI改性的性能最佳的PVSC表现出16.70％的出色功率转换效率（PCE），高填充因子（FF）为84.65％，短路电流密度（J SC）为15.45 mA cm -2，并且开路电压（V OC）为1.23V。相比之下，未经表面改性的对照PVSC的PCE较低，为14.50％，FF为80.56％，J SC为15.05 mA cm -2，V OC为1.20V。通过CFPEAI钝化，CsPbI 2钙钛矿薄膜呈现出增强的疏水性，因此与没有任何表面改性的对照PVSC相比，相应的PVSC具有更高的稳定性。
更新日期：2020-10-06
中文翻译：
全无机CsPbI2Br与氟化有机铵盐的表面钝化，用于钙钛矿型太阳能电池，效率超过16％
表面改性被证明是提高钙钛矿太阳能电池（PVSC）效率和稳定性的有效策略。具有强疏水性的氟化有机铵盐很少用作CsPbI 2 Br钙钛矿表面改性的钝化剂。本文首次将氟化有机卤化铵盐4-碘代三氟甲基苯乙铵（CFPEAI）掺入CsPbI 2 Br钙钛矿表面。CFPEAI改性后，CsPbI 2的缺陷钙钛矿被钝化，陷阱密度降低。经过CFPEAI改性的性能最佳的PVSC表现出16.70％的出色功率转换效率（PCE），高填充因子（FF）为84.65％，短路电流密度（J SC）为15.45 mA cm -2，并且开路电压（V OC）为1.23V。相比之下，未经表面改性的对照PVSC的PCE较低，为14.50％，FF为80.56％，J SC为15.05 mA cm -2，V OC为1.20V。通过CFPEAI钝化，CsPbI 2钙钛矿薄膜呈现出增强的疏水性，因此与没有任何表面改性的对照PVSC相比，相应的PVSC具有更高的稳定性。
京公网安备 11010802027423号