Development of efficient solar cells under indoor light has attracted tremendous attention because of the Internet of Things revolution. Here we investigate the effect of chlorine in perovskite precursors for indoor light applications. Use of chlorine has an effect on the photovoltaic performance of perovskite solar cells, especially under low-intensity indoor light. Based on the characterization of leakage current, crystalline structure, and Urbach tail, we reveal that chlorine doping of the perovskite layer influences the movement of photo-generated carriers and ions because of the smaller bulk defects in perovskite. In particular, we suggest that chlorine doping in perovskite facilitates hole extraction on its top surface and contributes to suppression of ion migration and non-radiative recombination, as confirmed by Kelvin probe force microscopy measurements. We demonstrate high performance of perovskite solar cells with a maximum power density of 35.25 (231.78) μW/cm² under 400 lux light-emitting diode (halogen) illumination.

由于物联网的革命，室内光下高效太阳能电池的开发引起了极大的关注。在这里，我们研究了钙在钙钛矿前体中对室内照明应用的影响。氯的使用会对钙钛矿太阳能电池的光伏性能产生影响，尤其是在低强度室内光下。根据泄漏电流，晶体结构和Urbach尾部的特征，我们发现钙钛矿层的氯掺杂会影响光生载流子和离子的运动，因为钙钛矿中的体积缺陷较小。特别是，我们建议钙钛矿中的氯掺杂可促进其顶部表面的空穴提取，并有助于抑制离子迁移和非辐射重组，由开尔文探针力显微镜测量证实。我们展示了高性能的钙钛矿太阳能电池，其最大功率密度为35.25（231.78）μW/ cm²在400 lux的发光二极管（卤素）照度下。