喷涂法制备混合阳离子钙钛矿太阳电池

采用热基底喷涂法分别制备了FA_0.85MA_0.15PbI₃和(FAPbI₃)_0.85(MAPbBr₃)_0.15两种混合阳离子钙钛矿薄膜,对两种薄膜进行了扫描电镜（SEM）、X-射线衍射（XRD）、紫外-可见光吸收光谱（UV-Vis）测试表征。结果表明,该方法制备的混合阳离子钙钛矿薄膜平整致密,FA_0.85MA_0.15PbI₃结晶性更好,并且吸收带边和吸收强度更大。将两种薄膜组装成平板太阳能电池,对电池的光电性能和稳定性进行了分析。结果表明,FA_0.85MA_0.15PbI₃ PSCs光电转换效率为13.21%,(FAPbI₃)_0.85(MAPbBr₃)_0.15 PSCs光电转换效率为12.08%,并且(FAPbI₃)_0.85(MAPbBr₃)_0.15 PSCs在放置80 d后,性能基本无变化,表明喷涂法制备(FAPbI₃)_0.85(MAPbBr₃)_0.15 PSCs具有较好的稳定性。

Fabrication of Mixed Cation Perovskite Solar Cells via Spray Deposition Method

In this work, FA_0.85MA_0.15PbI₃ and (FAPbI₃)_0.85(MAPbBr₃)_0.15 mixed cation perovskite films were prepared via spray deposition method. Properties of these two films were characterized by emission scanning electron microscope (SEM), X-ray diffraction (XRD) and UV visible light absorption spectroscopy (UV-Vis). Results showed that films prepared by spray deposition were uniform and dense. Compared with FA_0.85MA_0.15PbI₃, the crystallinity of FA_0.85MA_0.15PbI₃ perovskite films was higher, and its light absorption property was more superior. The fabricated planar solar cells can achieved a power conversion efficiency (PCE) of 13.21% with FA_0.85MA_0.15PbI₃ perovskite layer, and 12.08% with (FAPbI₃)_0.85(MAPbBr₃)_0.15 perovskite layer. The PCE of (FAPbI₃)_0.85(MAPbBr₃)_0.15 PSCs was nearly unchanged after 80 days, which was much more stable than FA_0.85MA_0.15PbI₃ PSCs.