材料科学
响应度
光探测
钙钛矿(结构)
氢键
紫外线
检出限
光电探测器
光电子学
结晶学
光化学
分子
有机化学
化学
色谱法
作者
Kailian Dong,Yang Xin,Fang Yao,Hengjiang Cong,Hai Zhou,Shun Zhou,Hongsen Cui,Shuxin Wang,Tao Chen,Chengliang Sun,Hua‐Hua Fu,Weijun Ke,Guojia Fang
标识
DOI:10.1002/adma.202313889
摘要
Two-dimensional (2D) Dion-Jacobson (DJ) perovskites typically outperform Ruddlesden-Popper (RP) analogs in terms of photodetection (PD). However, the mechanism behind this enhanced performance remains elusive. Theoretical calculations for elucidating interlayer spacer conformation-induced multiple hydrogen bonds in 2D perovskite are presented, along with the synthesis of DPAPbBr4 (DPB) single crystals (SCs) and their PD properties under X-ray/ultraviolet (UV) excitation. The high-quality DPB SC enhances PD with exceptional photoresponse attributes, including a high on/off ratio (4.89 × 104), high responsivity (2.44 A W⁻1), along with large dynamic linear range (154 dB) and low detection limit (7.1 nW cm⁻2), which are currently the best results among 2D perovskite SC detectors, respectively. Importantly, high-resolution images are obtained under UV illumination with weak light levels. The SC X-ray detector exhibits a high sensitivity of 663 µC Gyair⁻1 cm-2 at 10 V and a detection limit of 1.44 µGyair s⁻1. This study explores 2D DJ perovskites for efficient and innovative optoelectronic applications.
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