A monolithically integrated near-infrared imager with crystallization- and oxidation-modulated tin-lead perovskites

作者：Zhichun Yang, Jingjing Liu, Haotian Bao, Zonghao Liu, Zaiwei Wang, Xiangdong Li, Zhihao Chen, Guofeng Zhang, Ruiyun Chen, Jianyong Hu, Shuangping Han, Wei Chen, Chengbing Qin, Liantuan Xiao, Suotang Jia · 发表于：Light Science & Applications · 年份：2025 · DOI：10.1038/s41377-025-01987-8 · 被引用次数：6 · 研究领域：Perovskite Materials and Applications、ZnO doping and properties、Quantum Dots Synthesis And Properties

Abstract The fast crystallization and facile oxidation of Sn 2+ of tin-lead (Sn-Pb) perovskites are the biggest challenges for their applications in high-performance near-infrared (NIR) photodetectors and imagers. Here, we introduce a multifunctional diphenyl sulfoxide (DPSO) molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species. The regulated perovskite film exhibits a dense morphology, reduced defect density and prolonged carrier diffusion length. The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm, dark current density of 4.7 × 10 −8 mA cm −2 , peak responsivity of 0.49 A W −1 and specific detectivity of 1.20 × 10 12 Jones in NIR region (780–1100 nm), –3 dB bandwidth of 11.4 MHz, linear dynamic range of 174 dB, and ultrafast rise/fall time of 14.2/17.1 ns, respectively. We demonstrate a 64 × 64 NIR imager with an impressive spatial resolution of 1.32 lp mm −1 by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.