High performance photodetectors based on In₂S₃, In₂S_1.5Se_1.5 and In₂Se₃ nanostructures

One-dimensional (1D) nanostructures, including nanofibers, nanocubes, and nanoplates of In2S3, In2S1.5Se1.5, and In2Se3 semiconductors, were synthesized using a hydrothermal technique for studying their photodetector behaviour. Photocurrent measurements demonstrate that semiconducting In2Se3 1D nanofibers display an exceptional response to white light, with a photo responsivity of 185.8 mA W-1 and a detectivity of 22.6 x 10(9) Jones, which is four times greater than that of In2S3 and In2S1.5Se1.5 nanostructures. The response times of the In2Se3 photodetectors are impressively short, measuring only 8.8 seconds. The superior responsivity detectivity and faster response time of the 1D In2Se3 nanofibers can be attributed to their large surface area, which boosts light absorption and facilitates efficient charge transfer, thereby enhancing the overall device performance.