Organic-inorganic composite day-blind type ultraviolet light detector

Abstract

The invention discloses an organic-inorganic composite day-blind type ultraviolet light detector which comprises a quartz substrate, a transparent metal electrode layer, an electrode modified layer, an organic-inorganic composite active layer, a cathode modified layer and a metal electrode layer. The transparent metal electrode layer, the electrode modified layer, the organic-inorganic composite active layer, the cathode modified layer and the metal electrode layer are sequentially arranged from bottom to top on the quartz substrate. The organic-inorganic composite active layer is a mixed layer of an organic donor material D and an inorganic acceptor material A or is a layer formed by an organic donor material D layer and an inorganic acceptor material A layer in a stacked mode. A molecular structure general formula of the organic donor material D can be found in the specification, wherein R is pyridine, pyrazine, pyrimidine, pyridazine, triazine and triazole. According to the organic-inorganic composite day-blind type ultraviolet light detector, the carrier transfer ability of the organic donor material with an ultra wide band gap can be improved, a selective response to radiation under 300nm is achieved, and the phenomenon that radiation under 300nm is absorbed by a common ITO substrate is greatly avoided.

Description

technical field [0001] The invention relates to a detector, in particular to an organic-inorganic composite sun-blind ultraviolet 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 area" ultraviolet signal having a clean surface background, no interference from sunlight, and light signal processing burden, the detection (reception) of the "sun blind area" ultraviolet ...

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 response, it is necessary to strictly limit the bandgap width of the active layer material.

Images