苝
二亚胺
材料科学
钙钛矿(结构)
光电探测器
接受者
聚合物
共轭体系
光电子学
侧链
响应度
微秒
光化学
结晶学
光学
有机化学
复合材料
分子
凝聚态物理
物理
化学
作者
Hailong Wang,Qinglei Zhang,Jiadong Zhou,Xiaojun Su,Guojing Xie,Ningning Tang,Nan Zheng,Linlin Liu,Zengqi Xie
标识
DOI:10.1002/adom.202201202
摘要
Abstract A series of donor‐node‐acceptor (D‐n‐A) type polymers containing linear conjugated backbone as donor and various contents of tetrachloronated perylene diimide (4Cl‐PDI) pendant as acceptor are synthesized for the application as hole‐transporting layers (HTLs) in n‐i‐p structured perovskite photodetectors (PDs). The strong aggregation behaviors of the linear conjugated backbone endow the polymers excellent hole transporting properties, and the strong electron affinity of 4Cl‐PDI pendant enables easily trapping of free electrons. Besides, the 4Cl‐PDI pendants in polymers suppress the intrinsic face‐on orientation of conjugated backbone. Both of the electron‐trapping property of 4Cl‐PDI pendant and the favorable edge‐on orientation of the conjugated backbone are benefits for restraining the dark current in perovskite PDs. Based on such D‐n‐A type hole‐transporting materials, durable vertical‐structure perovskite PDs are successfully demonstrated with superior performance of high responsivity of 0.32 A W −1 , high detectivity of 2.2 × 10 12 Jones, and fast response speed in microsecond scales.
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