Organic hetero-junction thin film photoresistor and photosensitive voltage divider based on organic conjugated molecules

A photoresistor and heterojunction technology, applied in the field of materials, can solve the problems of restricting the use of cadmium, damage to the human respiratory tract, liver and kidney, etc., and achieves the effects of cheap source, low cost and wide source.

Active Publication Date: 2015-08-26
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term exposure to cadmium and its compounds can damage the human respiratory tract, liver and kidneys. The European Union has implemented the "Directive on Restricting the Use of Certain Hazardous Components in Electrical and Electronic Equipment" in 2006, strictly restricting the use of cadmium in electronic and electrical products

Method used

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  • Organic hetero-junction thin film photoresistor and photosensitive voltage divider based on organic conjugated molecules
  • Organic hetero-junction thin film photoresistor and photosensitive voltage divider based on organic conjugated molecules
  • Organic hetero-junction thin film photoresistor and photosensitive voltage divider based on organic conjugated molecules

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Example 1. Preparation of copper phthalocyanine / peryleneimide photoresistors, peryleneimide photoresistors and phthalocyanine resistors on flat glass and their application in visible light detection

[0055] 1) Clean the substrate

[0056] The flat glass was ultrasonically cleaned with concentrated sulfuric acid, hydrogen peroxide, water, deionized water, ethanol and isopropanol for 5 minutes, and then dried; ordinary polyethylene terephthalate plastic sheets were ultrasonically cleaned with acetone for 5 minutes, Ready to use after drying;

[0057] 2) Fix the substrate treated in step 1) on the rotor of a desktop homogenizer, and add dropwise a dilute solution of N,N-dimethylformamide dissolved in polyacrylonitrile (the concentration of polyacrylonitrile is 30mg / ml) Or the toluene solution of polyphenoxy ether (polyphenoxy ether concentration is 30mg / ml), spin coating at a constant speed of 3000 rpm for 60 seconds, and form a dense and pinhole-free polymer film on the...

Embodiment 2

[0067] Example 2. Preparation of a photosensitive voltage divider constructed of all-organic conjugated molecules on flat glass

[0068] 1) The flat glass was ultrasonically cleaned with concentrated sulfuric acid, hydrogen peroxide, water, deionized water, ethanol and isopropanol for 5 minutes, and then dried; ordinary polyethylene terephthalate plastic sheets were ultrasonically cleaned with acetone for 5 minutes. Minutes, dry and ready to use;

[0069] 2) Fix the substrate treated in step 1) on the rotor of a desktop homogenizer, and add dropwise a dilute solution of N,N-dimethylformamide dissolved in polyacrylonitrile (the concentration of polyacrylonitrile is 30mg / ml) Or a toluene solution of polyphenoxy ether (polyphenoxy ether concentration is 30mg / ml), spin coating at a constant speed of 3000 revolutions per second for 60 seconds to form a dense and pinhole-free polymer film on the flat glass;

[0070] 3) Put the substrate obtained in step 2) into a vacuum oven and he...

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Abstract

The invention discloses an organic hetero-junction thin film photoresistor and a photosensitive voltage divider based on organic conjugated molecules. The photosensitive voltage divider is composed of a base, a substrate, a patterning metal electrode layer and a resistive layer which are arranged from the bottom to the top in turn. The resistive layer is composed of a hetero-junction thin film and a phthalocyanine thin film II which are coplanar, and the connection mode of the hetero-junction thin film and the phthalocyanine thin film II is series connection. The hetero-junction thin film and the phthalocyanine thin film II share a segment of metal electrode. Two cheap and common organic dyes of phthalocyanine copper/nitrogen and nitrogen-dioctyl-3,4,9,10-perylene bisimide are utilized for the first time to prepare the organic thin film photoresistor with the maximum linear dynamic range of being up to 81dB, and the voltage divider which is extremely sensitive to weak light irradiation is also acquired so that foundation is established for a later weak light detector and a light detection circuit constructed by all-organic conjugated molecules.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an organic heterojunction thin-film photoresistor and a photosensitive voltage divider based on organic conjugated molecules. Background technique [0002] A photoresistor, also known as a photovoltaic cell, is a basic electronic component that converts light radiation into an electrical signal. Specifically, when the incident light whose wavelength matches the band gap of the active layer semiconductor irradiates the photosensitive resistor, its resistance value will decrease sharply, which is called photoconductivity. In national life and production, by embedding photoresistors into circuits, light-controlled automatic switch street lights, burglar alarms, and electronic shutters for industrial cameras can be obtained. Photoresistors sensitive to visible light bands (380nm-780nm) usually use cadmium compounds such as cadmium sulfide and cadmium selenide as photoconductors. Long-term ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/621H10K85/311H10K85/371H10K30/20Y02E10/549Y02P70/50
Inventor 刘云圻王翰林程诚胡文平于贵
Owner INST OF CHEM CHINESE ACAD OF SCI
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