Novel ultraviolet detector based on air discharge of friction nano-generator and detecting method thereof

Abstract

The invention provides a novel ultraviolet detector based on air discharge of a friction generator and a detecting method thereof. The ultraviolet detector is still based on a semiconductor material surface oxygen adsorption desorption mechanism, and comprises an ionized air assembly and an ultraviolet detecting assembly. The ionized air assembly includes a friction nano-generator, a rectifying circuit and a discharge probe. The friction nano-generator includes two opposite moving parts. The two opposite moving parts can switch back and forth between a separated state and a contact state to form an AC pulse signal, and an output end of the friction nano-generator is electrically connected with an input end of the rectifying circuit to transmit the AC pulse signal. A negative electrode output end of the rectifying circuit is connected to the discharge probe, and a positive electrode output end of the rectifying circuit is grounded. According to the invention, the high-voltage output isprovided by the friction nano-generator, the air is directly ionized to generate O2, and the dependence of the oxygen adsorption on the surface of the semiconductor material layer on the concentrationof free electrons is fundamentally eliminated.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet detectors, and in particular relates to a novel ultraviolet light detector based on triboelectric generator air discharge and a detection method thereof. Background technique [0002] Ultraviolet detectors based on surface oxygen adsorption and desorption mechanisms have attracted widespread attention due to their advantages of high sensitivity and fast recovery. However, this type of detector generally has the problem of slow response, and its response time is generally at the level of seconds, which seriously limits its application in fast optical switches and optical detection. [0003] In order to improve the recovery speed of this type of ultraviolet detector, the current focus is mainly on the preparation of nano-devices with different structures, such as single nanowire devices or nano-ultraviolet detectors constructed of composite nanomaterials; Complexity, high preparation cost, or t...

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Problems solved by technology

[0004] The present invention aims at the problem that the current ultraviolet detector relies on the concentration of free electrons on the surface and causes slow recovery speed, and provides a new type of ultraviolet light detector and its detection method based on triboelectric generator air discharge, which provides high-voltage output through triboelectric nanogenerator , directly ionizes air to produce O 2 - , fundamentally get rid of the dependence of oxygen adsorption on the surface of semiconductor material layer on the concentration of free electrons

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