Self-powered, thermally stable Sb2Se3-based high-performance broadband photodetector

High-performance broadband photodetectors are widely studied due to their unique significance in military and industrial applications. Vander Waals materials-based detector that simultaneously achieves a fast and high response are prerequisites for expanding the current capabilities of the optoelectronic device. Yet the thermal stability of the Vander Waals materials-based broadband (450 nm to 1250 nm) device is rarely addressed. Here, an antimony selenide (Sb2Se3) based photodetector is reported, which reveals high photo-responsivity and detectivity up to 924 mAW-1 (346 mAW-1) and 2.7 x 1010 Jones (1.0 x 1010 Jones) for the illumination wavelength 1064 nm (532 nm) under photovoltaic mode. Moreover, under 0 V-applied bias condition, the developed detector thermal stability was tested, and up to 100 degrees C devices disclosed a stable behavior. Further, the fabricated Sb2Se3-based broadband device was also tested under photoconductive mode. The photodetector demonstrates high responsivities of 1.5 x 104 mAW-1 (1.3 x 104 mAW-1) and 4.1 x 104 mAW-1 (3.8 x 104 mAW-1) for the illumination wavelength 532 nm and 1064 nm, respectively at room temperature (100 degrees C) under 0.5 V applied bias condition and 1 mu W optical power. The design device can offer ideas for constructing high thermal stability and encouraging such materials in broadband photodetector applications. The state-of-the-art Sb2Se3-based detector can facilitate the translation of solution-processed optoelectronic applications from the laboratory to the marketplace.

Automated summary

This study presents a high-performance photodetector based on antimony selenide, which exhibits fast and high response as well as thermal stability across a wide range of wavelengths. The findings provide insights for designing high thermal stability detectors and promoting the use of such materials in photodetector applications.