Organic/nano-sodium tantalate composite sun-blind ultraviolet light detector

Abstract

The invention discloses an organic / nano-sodium tantalate composite sun-blind ultraviolet light detector. It includes a quartz substrate, a transparent metal electrode layer, an electrode modification layer, an organic-inorganic composite active layer, a cathode modification layer, and a metal electrode layer; from the bottom to the top of the quartz substrate, a transparent metal electrode layer, an electrode modification layer, an organic - inorganic composite active layer, cathode modification layer, metal electrode layer; the organic-inorganic composite active layer is: a mixed layer of organic donor material D and inorganic acceptor material A or a laminated organic donor material D layer and Inorganic acceptor material A layer. The general molecular structure formula of the organic donor material D is: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Among them, n=1~5. The invention can improve the carrier mobility of the ultra-wide bandgap organic donor material, realize the selective response to the radiation below 300nm, and greatly avoid the absorption of the radiation below 300nm by the common ITO substrate.

Description

technical field [0001] The invention relates to a detector, in particular to an organic / nano-sodium tantalate composite sun-blind ultraviolet light detector. technical background [0002] During the passage of solar ultraviolet radiation through the atmosphere, due to strong absorption by oxygen atoms in the thermosphere and ozone in the stratosphere, only ultraviolet rays in the 300-400nm band can reach the near-surface space (below 25,000 meters), resulting in There is almost no ultraviolet radiation in the 0-300nm band in the atmosphere, and this band is the so-called "solar blind zone"; while the ultraviolet rays reaching the surface form a uniform ultraviolet background due to the scattering effect of the atmosphere, which is called the "visible blind zone". In view of the advantages of the "sun blind zone" ultraviolet signal having a clean surface background, no interference from sunlight, and light signal processing burden, the detection (reception) of the "sun blind ...

AI Technical Summary

Problems solved by technology

If the transparent metal electrode is used as the counter electrode and the light is incident from this side, although the detection range of the device can be extended to the wavelength band below 300nm, in order to increase the transmittance of the electromagnetic wave below 300nm in the transparent metal electrode layer as much as possible, it is generally necessary to The transparent metal electrode layer is made very thin, which greatly increases the contact probability between the active layer material in the detector and the water and oxygen in the external environment, which is not conducive to the long-term work of the device, which requires the design of a new device structure

At the same time, if the device is to achieve intrinsic solar-blind ultraviolet band response, it is necessary to strictly limit the bandgap width of the active layer material.

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