@article{Chen2025, 
author = {Shuo Chen and Hong-Bo Li and Yi Fu and Guo-Qiang Liu and Muhammad Ishaq and Jun Luo and Jian-Min Li and Bo Che and Jing-Ting Luo and Liming Ding and Tao Chen and Guang-Xing Liang},
title = {High-performance flexible Sb2Se3 thin-film photodetector for tunable color imaging and wearable physiological monitoring applications},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {2},
pages = {94907159},
keywords = {heart rate, Sb2Se3, flexible thin-film photodetector, color imaging, arterial blood oxygen saturation},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907159},
doi = {10.26599/NR.2025.94907159},
abstract = {Antimony selenide (Sb2Se3) has recently made considerable advancements in photovoltaic, photoelectrochemical, and photodetector research scenarios, owing to its advantageous material merits and superior optoelectronic properties. By contrast, the exploration of flexible Sb2Se3 photoelectric devices are less attempted, though it possesses unique one-dimensional (1D) crystal structure to enable large deformation tolerance. Here, we develop a flexible Sb2Se3 thin-film photodetector on polyimide substrate. Thanks to the high-quality Sb2Se3 light absorber and benign interfaces at both back contact and heterojunction regions, the carrier dynamics are effectively optimized. The leading flexible Sb2Se3 photodetector showcases self-powered and broadband features, with exceptional responsivity of 0.51 A·W–1 and realistic detectivity up to 1.32 × 1013 Jones, ultra-fast response speed of 49 ns/351 ns of rise and decay times, and remarkable mechanical deformation stability, flourishing the high-level development for flexible Sb2Se3 photodetectors. Interestingly, a tunable single/dual-color flexible imaging system under band alignment modulation, along with a wearable and accurate heart rate/arterial blood oxygen saturation photoplethysmography detection system highlights the great application potential for flexible Sb2Se3 photodetectors.}
}