Stress Release of Single Crystal Arrays Bridged by SAM Interface Toward Highly Mechanically Durable Flexible Perovskite NIR Photodetector

• DOI: 10.1002/adma.202413721
• Publication Date: 2025-02-13T09:55:47Z
• Authors: Xing Yin; Yingjie Zhao; Chaoxin Pei; Zhaokai Wang; Yicheng Sun; Mengru Zhang; Yi Hao; Xiao Wei; Zishen Zhao; Kaixin Dong; Jinjin Zhao; Yu Chen; Yanlin Song

Abstract Perovskite photodetectors with superior optoelectronic properties, lightweight, and compatibility flexible substrates have attracted much attention in wearable electronics. However, the large bandgap, inherent brittleness, poor environmental stability, weak interfacial adhesion interaction between perovskites hinder application of near‐infrared (NIR) devices. Herein, a universal strategy to enhance performance mechanical stability perovskite NIR photodetector arrays is demonstrated through combination mussel‐inspired self‐assembled monolayer (SAM) bridging interface precise modulation nano‐array size, which enables significantly increase adhesion, crystallinity, crystallographic orientation, reduce stresses single‐crystal arrays. Moreover, inserting paddle‐wheel metal–organic cluster ligands lead an unprecedented small bandgap 1.04 eV, enhanced lattice rigidity, for 2D perovskite. The robustness record are revealed maximum response wavelength 1050 nm, responsivity 1.66 A W −1 , detectivity 6.19 × 10 12 Jones, high fidelity imaging, extra‐long stability. This work pioneers new insight into integration high‐performance mechanically durable