Abstract：
Recently, due to the superior stability and lower risk of toxicity, the development of Pb-free halide double perovskite materials has revived excellent interest. In this work, Pb-free perovskite solar cells (PSCs) with ITO/ETL/Cs2AgBiBr6/Cu2O/Au multilayer structures with Cs2AgBiBr6 double perovskite as the solar light absorber layer, some electron transport layers (ETLs) and Cu2O as a hole transport layer have been introduced. Then, the effects of various thicknesses of the absorber layer and also ETL materials, like ZnO, C60, CdS, SnO2, phenyl-C61-butyric acid methyl ester (PCBM), and TiO2, on the device performance (including photoelectronic conversion efficiency (PCE), fill factor (FF%), short circuit current density (Jsc), and open-circuit voltage (VOC)) were examined with the help of a solar cell simulator (SCAPS-1D). It is noteworthy that, in the case of all ETL materials, the optimal thickness of the absorber layer was determined to be 400 nm. Then, the maximum PCE values of 20.08%, 17.63%, 14.07%, 12.11%, 14.94%, and 18.83% were obtained for the solar cells containing ZnO, C60, CdS, SnO2, PCBM, and TiO2 as the ETL, respectively. These results show that designing/developing Pb-free halide double perovskite devices having comparable PCEs with the Pb-based PSCs is feasible, provided that proper/compatible materials will be used in the multilayer structure of the next generations of solar cells.
摘要：
最近,由于优越的稳定性和较低的毒性风险，开发无铅卤化物双钙钛矿材料引起了人们的极大兴趣。在这项工作中,具有ITO/ETL/Cs2AgBiBr6/Cu2O/Au多层结构的无铅钙钛矿太阳能电池（PSC），以Cs2AgBiBr6双钙钛矿作为太阳能吸收层，一些电子传输层(ETL)和Cu2O作为空穴传输层已经被引入。然后，吸收层和ETL材料的各种厚度的影响，像ZnO，C60,CdS,SnO2,苯基-C61-丁酸甲酯(PCBM),和TiO2，对器件性能(包括光电转换效率(PCE)，填充因子（FF%），短路电流密度(Jsc)，和开路电压（VOC））在太阳能电池模拟器（SCAPS-1D）的帮助下进行检查。值得注意的是,在所有ETL材料的情况下，吸收层的最佳厚度被确定为400nm。然后，最大PCE值为20.08%，17.63%,14.07%,12.11%,14.94%,含有ZnO的太阳能电池获得了18.83%，C60,CdS,SnO2,PCBM,和TiO2作为ETL，分别。这些结果表明，设计/开发具有与Pb基PSC相当的PCE的无铅卤化物双钙钛矿器件是可行的，前提是合适的/相容的材料将用于下一代太阳能电池的多层结构中。
