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

Lifang WuMaterials Genome Institute Shanghai University Shanghai 200444 ChinaQianwen CaoMaterials Genome Institute Shanghai University Shanghai 200444 ChinaHongyu LiMaterials Genome Institute Shanghai University Shanghai 200444 ChinaXiaojie LiuMaterials Genome Institute Shanghai University Shanghai 200444 ChinaWanbo LiMaterials Genome Institute Shanghai University Shanghai 200444 ChinaTianhao WuMaterials Genome Institute Shanghai University Shanghai 200444 ChinaXingli ZouSchool of Materials Science and Engineering Shanghai University Shanghai 200444 ChinaJiang ChengSchool of Materials Science and Engineering Chongqing University of Arts and Sciences Chongqing 402160 ChinaLi LüSchool of Materials Science and Engineering Chongqing University of Arts and Sciences Chongqing 402160 ChinaChengxi ZhangSchool of Science Jiangsu University of Science and Technology Zhenjiang 12676 ChinaNemygina ElizavetaLaboratory of New Materials for Solar Energetics Faculty of Materials Science Lomonosov Moscow State University Moscow 119991 Russian FederationAlexey B. TarasovDepartment of Chemistry Lomonosov Moscow State University Moscow 119991 Russian FederationHongliang DongCenter for High Pressure Science and Technology Advanced Research Shanghai 201203 ChinaS. B. DonaevFaculty of Electronics and Automation Tashkent State Technical University University Street 2 Tashkent 100095 UzbekistanKatsuhiro AkimotoDepartment of Applied Physics Faculty of Pure and Applied Sciences University of Tsukuba Tsukuba Ibaraki 305‐8573 JapanShenghao WangMaterials Genome Institute Shanghai University Shanghai 200444 China

Advanced Functional Materialsjournal2025en

Ochiq kirish: yoʻq

ABI

Annotatsiya

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.

Hali tarjima qilinmagan

Mavzular

Perovskite Materials and Applications Ga2O3 and related materials Gas Sensing Nanomaterials and Sensors

Identifikatorlar

DOI: 10.1002/adfm.202505180

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