In order to optimize microstructure and improve the photoelectric properties of planar perovskite solar cells (PSCs), the Cs⁺ and SCN⁻ are selected to tune the A-site cation and X-site anion composition of CH₃NH₃PbI₃ material with ABX₃ structure, respectively. The effects of Cs⁺ and SCN⁻ addition on the microstructure and photoelectric properties of (CH₃NH₃)_0.9Cs_0.1Pb(I_1-xSCN_x)₃ perovskite films and the performance of PSCs have been systematically investigated. The value of “x” corresponding to the amount of SCN⁻ has been optimized. At the optimum amount of 0.05, the (CH₃NH₃)_0.9Cs_0.1Pb(I_0.95SCN_0.05)₃ (Cs_0.1SCN_0.05) PSC achieve the champion power conversion efficiency (PCE) of 18.78% and average PCE of 17.66%, being much higher than that of the reference PSCs. The results indicate that the obtained Cs_0.1SCN_0.05 perovskite film shows the improved microstructure, better local electric properties, the reduced trap density and suppressed charge recombination, resulting in the promoted carrier transfer and improved performance in PSCs.

为了优化微观结构和提高平坦钙钛矿太阳能电池（的PSC），则Cs的光电特性⁺和SCN ^-被选择以调谐CH的A位阳离子和X-现场阴离子组合物₃ NH ₃碘化铅₃与ABX材料_3个结构，分别。Cs的影响⁺和SCN ^-除了上（CH的微观结构和光电性能₃ NH ₃）_0.9铯_0.1铅（I _1-x SCN _X）₃钙钛矿膜和PSC的性能已得到系统地研究。的“x”对应于SCN的量的值^-已被优化。在0.05的最佳量下，（CH ₃ NH ₃）_0.9 Cs _0.1 Pb（I _0.95 SCN _0.05）₃（Cs _0.1 SCN _0.05）PSC的冠军功率转换效率（PCE）为18.78％，平均PCE为17.66％ ，远高于参考PSC的PSC。结果表明，所得Cs _0.1 SCN _0.05 钙钛矿薄膜显示出改善的微观结构，更好的局部电性能，降低的陷阱密度和抑制的电荷复合，从而促进了载流子转移，并改善了PSC的性能。