Ultrasensitive and Fast Gas Detection Based on Room-Temperature Indium Arsenide Mid-Wavelength Infrared Photodetectors

被引：1

作者：

Dong, Yi ^{[1
,2
]}

Duan, Shikun ^{[1
,2
]}

Long, Siyu ^{[1
,2
]}

Jiang, Yu ^{[1
,2
]}

Ma, Xinyu ^{[1
,2
]}

Fang, Yueyue ^{[1
,2
]}

Liu, Jinjin ^{[1
,2
]}

Wu, Hao ^{[1
,2
]}

Li, Tangxin ^{[1
,2
]}

Jiang, Xiaoyong ^{[1
,2
]}

Chen, Shouheng ^{[3
]}

Hu, Shuhong ^{[1
,2
]}

Fu, Xiao ^{[1
,2
]}

Chen, Xiaolong ^{[3
]}

Chen, Fansheng ^{[1
,2
]}

Miao, Jinshui ^{[1
,2
]}

Hu, Weida ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, State Key Lab Infrared Phys, Shanghai 200083, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 101408, Peoples R China

[3] Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2025年 / 35卷 / 23期

基金：

中国国家自然科学基金;

关键词：

indium arsenide; mid-wavelength infrared photodetector; non-dispersive infrared absorption spectroscopy; ultra-sensitive and fast gas detection; METHANE DETECTION; SENSOR;

D O I：

10.1002/adfm.202422398

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Combustible hydrocarbon gases, typified by methane, are invisible, odorless, and imperceptible, yet they pose significant hazards to human safety and the environment. Therefore, monitoring these gases is crucial in managing and mitigating potential hazards. Here, a gas sensing system is proposed based on the non-dispersive infrared absorption spectroscopy (NDIR) technique. Its core component is a home-built indium arsenide (InAs) semiconductor mid-wavelength infrared photodetector. By material growth and device structure optimization (a peculiar potential barrier layer is designed to form a heterojunction and suppress diffusion carriers), the InAs-based photodetectors show a low-noise performance of 1.62 x 10(-12) A<middle dot>Hz(-1/2) and a record high room-temperature detectivity of 2.1 x 10(10) cm<middle dot>Hz(1/2)<middle dot>W-1 with superior response speed of <40 ns. The sensing system, therefore, gains an ultra-sensitive (<1 ppm) and fast (approximate to 350 ms) gas detection capability of methane compared to current NDIR equipment. The method used in this study paves an avenue for designing ultrasensitive NDIR systems based on photovoltaic devices and provides a new paradigm for highly integrated gas sensing hardware.

引用

页数：9

共 37 条

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