Intrinsic Vacancy in 2D Defective Semiconductor In2S3 for Artificial Photonic Nociceptor

Abstract To develop an advanced artificial intelligent optoelectronic information system, to accurately simulate the photonic nociceptors, like process of activation a human visual nociceptive pathway, is great significance. The visible light reaches retina for perception, but its excessive exposure can cause tissue damage. However, there are relatively few reports on light-triggered nociceptors. Here, we introduce two-dimensional natural defective III-VI semiconductor β-In2S3 and utilize broad spectral response including brought by intrinsic defects triggered nociceptor. mode device, under excitation, very similar that eye, it perfectly reproduces pain perception characteristics such as “threshold”, “relaxation”, “no adaptation”, “sensitization”. Its working principle attributed mechanism charge trapping associated with vacancies in In2S3 nanosheets. This work provides attractive material system (intrinsic semiconductors) broadband nociceptor.