Hydrophobic Cu2O Quantum Dots Enabled by Surfactant Modification as Top Hole‐Transport Materials for Efficient Perovskite Solar Cells

• DOI: 10.1002/advs.201801169
• Publication Date: 2019-02-07T18:18:30Z
• Authors: Chang Liu; Xianyong Zhou; Shuming Chen; Xingzhong Zhao; Songyuan Dai; Baomin Xu
• Keywords: Surface Modification

Abstract The utilization of an inorganic hole‐transport layer (HTL) is one the most effective methods to improve stability and reduce cost perovskite solar cells (PSCs). However, achieving high‐quality HTL films, especially films in n‐i‐p structures, via solution processes remains a big challenge. Here, simple surface modification strategy for low‐cost stable cuprous oxide (Cu 2 O) quantum dots proposed, which utilizes silane coupling agent. modified Cu O can be directly deposited on film as top without decomposing maintain structure. efficiency (18.9%) PSCs with surface‐modified significantly higher than that (11.9%) unmodified O, also record O‐based cell enhanced performance attributed remarkably properties achieved through modification. Moreover, because dopant‐free technology hydrophobic surface, have distinctly better 2,2′,7,7′‐tetrakis[ N , ‐di(4‐methoxyphenyl)amino]‐9,9′‐spiro‐bifluorene‐based PSCs.