Organic sun-blind UV detectors

A technology of solar blindness and ultraviolet light, 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, and achieves the effect of low price and convenient processing

Active Publication Date: 2015-11-18
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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Experimental program
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Effect test

Embodiment 1

[0032] The glass substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone in sequence for 5 minutes, then rinsed with deionized water and dried. A layer of metal aluminum with a thickness of 2 nm was vacuum-deposited on a glass substrate, and after UV-ozone treatment, a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40 nm was prepared by spin coating, 120° Bake at C for 15 minutes and take out. D (n=1) was chosen as the donor material, and A (R was pyrazine) as the acceptor material. First, D with a thickness of about 30 nm was prepared on PEDOT:PSS by spin coating, and then A with a thickness of about 20 nm was prepared on the D film by vacuum evaporation. The above two layers constitute the organic activity of the planar heterojunction structure. Floor. Finally, 1 nm thick LiF and 100 nm thick aluminum electrodes were sequentially prepared by vacuum evaporation. As above, get figure 1 The organic solar-blind...

Embodiment 2

[0034] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone in sequence for 5 minutes, then rinsed with deionized water and dried. A layer of metallic silver with a thickness of 30 nm was vacuum-deposited on a quartz substrate, and after UV-ozone treatment, a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40 nm was prepared by spin coating at 120°C Remove after 15 minutes of baking. D (n=2) was chosen as the donor material, and A (R was pyridine) as the acceptor material. A mixed film with a thickness of about 70 nm was prepared on PEDOT:PSS by vacuum mixed evaporation. During the preparation process, by controlling the evaporation rate, the weight ratio of donor:acceptor in the mixed film was 9:1, forming a bulk The organic active layer of the heterojunction structure. Finally, 1 nm thick LiF and 200 nm silver electrodes were prepared sequentially by vacuum evaporation. As above, get figure 1 T...

Embodiment 3

[0036] The quartz substrate was ultrasonically washed with detergent, isopropanol, ethanol, and acetone in sequence for 5 minutes, then rinsed with deionized water and dried. A layer of metal gold with a thickness of 15 nm was vacuum-deposited on a quartz substrate, and after UV-ozone treatment, a PEDOT:PSS (polyaniline derivative) hole transport layer with a thickness of about 40 nm was prepared by spin coating, 120°C Remove after 15 minutes of baking. D (n=3) was chosen as the donor material, and A (R was pyrimidine) as the acceptor material. First, D with a thickness of about 30 nm was prepared on PEDOT:PSS by vacuum evaporation, and then A with a thickness of about 30 nm was prepared on the D film by vacuum evaporation. The above two layers constitute a planar heterojunction structure. active layer. Finally, 1 nm thick LiF and 300 nm gold electrodes were prepared sequentially by vacuum evaporation. As above, get figure 1 Shown is a high-response solar-blind UV light de...

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Abstract

The invention discloses an organic solar blind ultraviolet-light detector which comprises a base, a transparent metal electrode layer, an organic hole transport layer, an organic active layer, a cathode modified layer and a metal electrode layer. The transparent metal electrode layer, the organic hole transport layer, the organic active layer, the cathode modified layer and the metal electrode layer are sequentially arranged on the base from bottom to top. According to the design of the organic active layer molecular structure and the device structure, on one hand, ultraviolet-light signals in the area less than 300nm are absorbed by the organic solar blind ultraviolet-light detector, a device is prevented from being interfered by visible blind ultraviolet-light signals and visible light signals, and on the other hand, contradictions between the substance conjugated length and a migration rate of the organic active layer are taken into account, and high response of radiation less than 300nm is achieved. Meanwhile, due to the fact that the side, covered by the transparent electrode layer, of the quartz / glass base is used by the device as a signal incident plane, absorption of radiation less than 300nm of an ordinary ITO glass base is greatly avoided.

Description

technical field [0001] The invention relates to a detector, in particular to an organic solar-blind ultraviolet light detector. technical background [0002] In the process of solar ultraviolet radiation passing through the atmosphere, due to the strong absorption of 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, 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 of the atmosphere, which is called the "visible blind zone". In view of the advantages of the "solar blind spot" ultraviolet signal with a clean surface background, no interference from sunlight, and light signal processing burden, the detection (reception) of the "sun blind spot" ultraviolet signal is of gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/44
CPCY02E10/549
Inventor 吴刚陈红征汪茫
Owner ZHEJIANG UNIV
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