Self-bias photoelectric detector and preparation method and application thereof

Abstract

The invention discloses a self-bias photoelectric detector and a preparation method and application thereof. The self-bias photoelectric detector comprises a substrate and a photoelectric structure fixed on the substrate, and the photoelectric structure comprises a photosensitive semiconductor layer, a blocking semiconductor layer and a counter electrode thin film layer. The photosensitive semiconductor layer is an n-type semiconductor material layer formed by cadmium sulfide; the barrier semiconductor layer is an n-type semiconductor material layer formed by titanium dioxide and/or metal-doped titanium dioxide. According to the self-bias photoelectric detector, cadmium sulfide is adopted as the photosensitive semiconductor layer, titanium dioxide and/or metal-doped titanium dioxide are/is adopted as the blocking semiconductor layer, the CdS layer has good photosensitive characteristics, and the CdS layer is matched with titanium dioxide to form a semiconductor junction, so that the leakage current can be reduced, and the photoelectric response effect can be improved. The self-bias photoelectric detector has the advantages of high reliability, low forward working voltage and high light extraction efficiency.

Description

technical field [0001] The present application relates to the technical field of photodetectors, and in particular, to a self-biased photodetector and a preparation method and application thereof. Background technique [0002] Photodetectors are the key components of future optical chip technology and optoelectronic integration technology, which require photodetectors with sufficiently high responsivity and response speed. The transparency of the device and the entry of the response band into the ultraviolet can make the photodetector work in sunlight, and can also integrate the detector under the screen, integrate on the glass, or prepare a fully transparent photodetector. Self-powered detectors have the characteristics of energy saving, permanent operation, and easy integration, and have been extensively studied. DC-AC nanogenerators based on self-powered photodetectors have also recently attracted great interest. Self-biased detectors are highly sensitive, but self-bias...

AI Technical Summary

Problems solved by technology

Self-biased detectors are highly sensitive, but self-biased photodetectors do not have photocurrent gain

Therefore, the responsivity of most existing self-powered photodetectors is not high, that is, the photocurrent intensity is not high under the same light intensity.

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