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

IF 23.4 Q1 OPTICS

Light-Science & Applications Pub Date : 2025-09-04 DOI:10.1038/s41377-025-01987-8

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

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Abstract

The fast crystallization and facile oxidation of Sn²⁺ 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 × 10¹² 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.

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具有结晶和氧化调制锡铅钙钛矿的单片集成近红外成像仪

锡铅（Sn-Pb）钙钛矿的快速结晶和易氧化Sn2+是其应用于高性能近红外（NIR）光电探测器和成像仪的最大挑战。在这里，我们将多功能二苯基亚砜（DPSO）分子引入到钙钛矿前驱体墨水中，通过揭示其与前驱体物种的强结合相互作用来应对这些问题。调控后的钙钛矿膜形貌致密，缺陷密度降低，载流子扩散长度延长。该自驱动光电探测器的光谱响应范围为300 ~ 1100 nm，暗电流密度为4.7 × 10 ~ 8 mA cm ~ 2，近红外区（780 ~ 1100 nm）的峰值响应率为0.49 a W ~ 1，比检出率为1.20 × 1012 Jones， -3 dB带宽为11.4 MHz，线性动态范围为174 dB，超快上升/下降时间为14.2/17.1 ns。我们通过将光电探测器与商用薄膜晶体管读出电路单片集成，展示了具有令人印象深刻的1.32 lp mm−1空间分辨率的64 × 64近红外成像仪。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Light-Science & Applications 数理科学, 物理学I, 光学, 凝聚态物性 II ：电子结构、电学、磁学和光学性质, 无机非金属材料, 无机非金属类光电信息与功能材料, 工程与材料, 信息科学, 光学和光电子学, 光学和光电子材料, 非线性光学与量子光学

自引率

0.00%

发文量

803

审稿时长

2.1 months