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High-responsivity organic sun-blind ultraviolet light detector

A responsivity, solar blind technology, applied in the field of detectors, can solve the problems of narrowing the selection space of organic materials and increasing the difficulty of device design, achieving the effect of low price and convenient processing

Active Publication Date: 2015-09-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At the same time, if the device is to achieve intrinsic solar-blind ultraviolet response, it is necessary to strictly limit the conjugate scale of organic materials.
At the same time, in order to make the device produce high responsivity in the sun-blind ultraviolet range, it is necessary to take into account the contradiction between the small conjugation scale of the organic material and the low carrier mobility, which greatly reduces the selection space of the organic material. Increased device design difficulty

Method used

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  • High-responsivity organic sun-blind ultraviolet light detector
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  • High-responsivity organic sun-blind ultraviolet light detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The glass substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water, and dried. Vacuum-deposit a layer of 10nm-thick metal aluminum on the glass substrate, and then prepare a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40nm by spin coating after UV-ozone treatment, 120° Bake at C for 15 minutes and remove. Choose D (R is pyrazine) as the donor material, and A (R is triazole) as the acceptor material. First prepare D with a thickness of about 30nm on PEDOT:PSS by spin coating, and then prepare A with a thickness of about 20nm on the D film by vacuum evaporation. The above two layers constitute the organic activity of the planar heterojunction structure Floor. Finally, 1nm thick LiF and 100nm thick aluminum electrodes were sequentially prepared by vacuum evaporation. As mentioned above, get as figure 1 The high-responsivity organic sun-blind UV photodetector sh...

Embodiment 2

[0034] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water and dried. Vacuum-deposit a layer of metallic silver with a thickness of 20nm on the quartz substrate, after UV-ozone treatment, prepare a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40nm by spin coating, 120°C Remove from the oven after 15 minutes. Choose D (R is pyridine) as the donor material, and A (R is triazine) as the acceptor material. A mixed film with a thickness of about 70nm was prepared by vacuum mixed evaporation on PEDOT:PSS. During the preparation process, the weight ratio of donor material D:acceptor material A in the mixed film was 95:5 by controlling the evaporation rate. , forming an organic active layer with a bulk heterojunction structure. Finally, 1nm thick LiF and 200nm silver electrodes were sequentially prepared by vacuum evaporation method. As mentioned above, get a...

Embodiment 3

[0036] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 5 minutes, rinsed with deionized water and dried. Vacuum-deposit a layer of 15nm thick metal gold on the quartz substrate, after UV-ozone treatment, prepare a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40nm by spin coating, 120°C Remove from the oven after 15 minutes. Choose D (R is pyridine) as the donor material, and A (R is pyridine) as the acceptor material. First prepare D with a thickness of about 30nm on PEDOT:PSS by vacuum evaporation, and then prepare A with a thickness of about 30nm on the D film by vacuum evaporation. active layer. Finally, 1nm thick LiF and 300nm gold electrodes were sequentially prepared by vacuum evaporation. As mentioned above, get as figure 1 A high-responsivity solar-blind UV detector is shown.

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Abstract

The invention discloses a high responsibility organic solar blind ultraviolet light detector. The detector comprises a substrate, a transparent metal electrode layer, an organic hole transmission layer, an organic active layer, a cathode modified layer and a metal electrode layer. The transparent metal electrode layer, the organic hole transmission layer, the organic active layer, the cathode modified layer and the metal electrode layer are sequentially arranged on the substrate from bottom to top. According to the high responsibility organic solar blind ultraviolet detector, by means of designing an organic activated molecular structure and a device structure, on one hand, an ultraviolet light signal under 300nm in an area is absorbed, the device is prevented from being disturbed by a visible blind ultraviolet signal and a visible light signal, on the other hand, the conflict between conjugate length and migration rate of active layer substance is considered, and high response of radiation under 300nm is achieved. Meanwhile due to the fact that one side of the quartz / glass substrate covered with the transparent metal electrode layer serves as a signal incidence face, and radiation under 300nm absorbed by an ordinary ITO glass substrate is greatly avoided.

Description

technical field [0001] The invention relates to a detector, in particular to a high-responsivity organic 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 zone" ultraviol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48G01J1/42
CPCY02E10/549
Inventor 吴刚陈红征汪茫
Owner ZHEJIANG UNIV
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