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Surface passivation by CTAB toward highly efficient and stable perovskite solar cells
Applied Surface Science ( IF 6.3 ) Pub Date : 2023-05-29 , DOI: 10.1016/j.apsusc.2023.157643
Nian Sha , Hari Bala , Bowen Zhang , Wei Zhang , Xiangli An , Diandian Chen , Zhiyong Zhao

Organic–inorganic hybrid perovskite materials with mixed organic cations (FAxMA(1-x)PbI3) have attracted intensive attention due to their superior optoelectronic properties. In this work, the FA0.3MA0.7PbI3 perovskite film were synthesized and applied in perovskite solar cells (PSCs) based on carbon counter electrode (CCE). And a passivation approach for the perovskite/CCE interface is presented, using cetyltrimethylammonium bromide (CTAB). The quaternary amine and bromine ion of CTAB can fill the vacancy defects of FA/MA and iodine ion, respectively, leading to a more hydrophobic and smoother surface than the untreated film. The optimum device based on 0.5 mg/ml CTAB exhibited an short-circuit current density of 23.68 mA·cm−2 with a power conversion efficiency of 12.69%, which is superior to PSCs without CTAB. The long-term stability test in ambient atmosphere with 40% relative humidity reveals the higher stability of PSCs with the surface passivation, which is favorable for its commercial application.



中文翻译:

CTAB 对高效稳定的钙钛矿太阳能电池进行表面钝化

具有混合有机阳离子的有机-无机杂化钙钛矿材料 (FA x MA (1-x) PbI 3 ) 因其优异的光电性能而备受关注。在这项工作中,FA 0.3 MA 0.7 PbI 3合成了钙钛矿薄膜并将其应用于基于碳对电极(CCE)的钙钛矿太阳能电池(PSC)。并提出了一种使用十六烷基三甲基溴化铵 (CTAB) 的钙钛矿/CCE 界面钝化方法。CTAB 的季胺和溴离子可以分别填充 FA/MA 和碘离子的空位缺陷,从而导致比未处理的薄膜更疏水和更光滑的表面。基于0.5 mg/ml CTAB的最佳器件表现出23.68 mA·cm -2的短路电流密度和12.69%的功率转换效率,优于没有CTAB的PSC。在相对湿度为40%的环境大气中进行的长期稳定性测试表明,经过表面钝化处理的PSCs具有更高的稳定性,有利于其商业化应用。

更新日期:2023-05-29
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