Recent Advances in Antimony Selenide Photodetectors

Abstract Photodetectors (PDs) rapidly capture optical signals and convert them into electrical signals, making them indispensable in a variety of applications including imaging, optical communication, remote sensing, and biological detection. Recently, antimony selenide (Sb₂Se₃) has achieved remarkable progress due to its earth‐abundant, low toxicity, low price, suitable bandgap width, high absorption coefficient, and unique structural characteristics. Sb₂Se₃ has been extensively studied in solar cells, but there's a lack of timely updates in the field of PDs. A literature review based on Sb₂Se₃ PDs is urgently warranted. This review aims to provide a concise understanding of the latest progress in Sb₂Se₃ PDs, with a focus on the basic characteristics and the performance optimization for Sb₂Se₃ photoconductive‐type and photodiode‐type detectors, including nanostructure regulation, process optimization, and stability improvement of flexible devices. Furthermore, the application progresses of Sb₂Se₃ PDs in heart rate monitoring, and monolithic‐integrated matrix images are introduced. Finally, this review presents various strategies with potential and feasibility to address challenges for the rapid development and commercial application of Sb₂Se₃ PDs.