Affiliation:
1. Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information Technology Anhui University 111 Jiu Long Road Hefei 230601 China
2. Department of Electronics and Information Engineering BoZhou University 2266 Tangwang Road Bozhou 236800 China
3. School of Physics Southeast University Nanjing 211189 China
Abstract
AbstractHigh‐sensitive uncooled mid‐wave infrared (MWIR) photodetection with fast speed is highly desired for biomedical imaging, optical communication, and night vision technology. Low‐dimensional materials with low dark current and broadband photoresponse hold great promise for use in MWIR detection. Here, this study reports a high‐performance MWIR photodetector based on a titanium trisulfide (TiS3) nanoribbon. This device demonstrates an ultra‐broadband photoresponse ranging from the visible spectrum to the MWIR spectrum (405–4275 nm). In the MWIR spectral range, the photodetector achieves competitive high photoresponsivity (R) of 21.1 A W−1, and an impressive specific detectivity (D*) of 5.9 × 1010 cmHz1/2 W−1 in ambient air. Remarkably, the photoresponse speed in the MWIR with τr = 1.3 ms and τd = 1.5 ms is realized which is much faster than the thermal time constant of 15 ms. These findings pave the way for highly sensitive, room‐temperature MWIR photodetectors with exceptionally fast response speed.
Funder
National Natural Science Foundation of China
State Key Laboratory of Luminescence and Applications