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

A study on a broadband photodetector based on hybrid 2D copper oxide/reduced graphene oxide

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[(Ph3P)2Ag(μ-SeCH2Ph)2In(SeCH2Ph)2]: a new heterobimetallic single source precursor as a springboard to bulk, nano and thin film ternary AgInSe2 materials

“…Metal chalcogenide (MC) semiconductors have garnered unprecedented recognition in the past few decades and have been explored widely in order to complement graphene due to their promising optoelectronic properties. [1][2][3][4] These materials, both in nano dimensions and in a thin film geometry, are considered quite exquisite due to their appealing electronic, physical and structural properties. 5,6 In this regard, ternary MCs are of particular interest as they blend the extraordinary properties of MCs with the benefit of physical and chemical property tunability, along with solution processability.…”

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