DataVXAdvanced Functional MaterialsPaper
journal article·2025-11

A 2D Perovskite Photodetector for NIR Range and Weak‐Light Imaging Applications via Thermal Regulation

Lifang Wu, Qianwen Cao, Hongyu Li, Xiaojie Liu, Wanbo Li, Tianhao Wu, Xingli Zou, Jiang Cheng, Lu Li, Chengxi Zhang, Nemygina Elizaveta, Alexey B. Tarasov, Hongliang Dong, Sardor B. Donaev, Katsuhiro Akimoto, Shenghao Wang

Advanced Functional Materials· Volume 35· Issue 48
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Source abstract

Abstract

Abstract 2D halide perovskites have attracted significant attention in photodetectors due to their inherent stability and outstanding optoelectronic properties. Owing to strong quantum confinement effects in low‐ n phases ( n < 5), pure Pb‐based 2D perovskites typically exhibit large bandgaps (> 1.6 eV), limiting their photodetection to the ultraviolet–visible region and leading to insufficient near‐infrared (NIR) response. In the present work, the 2D PEA 2 FA 4 Pb 5 I 16 perovskite with superior crystallinity, a thicker perovskite absorption layer, and suppressed n = 2 phase presence, is fabricated via a thermal regulation method, enabling the development of a self‐power, high‐sensitivity NIR photodetector. The 2D perovskite photodetector exhibits excellent operational characteristics, including an extremely low noise current of less than 3 pA Hz −1/2 , and a high on/off switching ratio of up to 2 × 10 5 . A notable responsivity of 0.325 A W −1 at 800 nm is achieved. Consequently, the 2D perovskite photodetector is capable of successfully acquiring high‐resolution images under weak NIR illumination (0.1 µW cm −2 ). These findings accentuate the tremendous potential of 2D perovskites in NIR weak light imaging, such as autonomous driving, machine vision, medical diagnostics, and other emerging fields.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Ga2O3 and related materials · Gas Sensing Nanomaterials and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials Genome Institute Shanghai University Shanghai 200444 China

State Key Laboratory of Advanced Refractories Shanghai University Shanghai 200444 China

School of Materials Science and Engineering Shanghai University Shanghai 200444 China

School of Materials Science and Engineering Chongqing University of Arts and Sciences Chongqing 402160 China

School of Science Jiangsu University of Science and Technology Zhenjiang 12676 China

Laboratory of New Materials for Solar Energetics Faculty of Materials Science Lomonosov Moscow State University Moscow 119991 Russian Federation

Department of Chemistry Lomonosov Moscow State University Moscow 119991 Russian Federation

Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China

Faculty of Electronics and Automation Tashkent State Technical University University Street 2 Tashkent 100095 Uzbekistan

Department of Applied Physics Faculty of Pure and Applied Sciences University of Tsukuba Tsukuba Ibaraki 305‐8573 Japan

Funding

National Natural Science Foundation of China · Natural Science Foundation of Chongqing Municipality

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