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Organic heterojunction thin film photoresistors and photosensitive voltage dividers based on organic conjugated molecules

A voltage divider and heterojunction technology, applied in the field of materials, can solve problems such as damage to the human respiratory tract, liver and kidneys, and limit the use of cadmium, and achieve the effect of cheap, low-cost, and wide-ranging sources

Active Publication Date: 2017-07-14
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 heterojunction thin film photoresistors and photosensitive voltage dividers based on organic conjugated molecules
  • Organic heterojunction thin film photoresistors and photosensitive voltage dividers based on organic conjugated molecules
  • Organic heterojunction thin film photoresistors and photosensitive voltage dividers based on organic conjugated molecules

Examples

Experimental program
Comparison scheme
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 heterojunction film photoresistor and a photosensitive voltage divider based on organic conjugated molecules. The photosensitive voltage divider consists of a base, a substrate, a patterned metal electrode layer, and a resistance layer from bottom to top; wherein, the resistance layer is composed of a coplanar heterojunction film and a phthalocyanine film II, and the The heterojunction film and the phthalocyanine film II are connected in series; the heterojunction film and the phthalocyanine film II share a section of metal electrode. In the present invention, two cheap and common organic dyes, copper phthalocyanine / nitrogen, nitrogen-dioctyl-3,4,9,10-peryleneimide are used for the first time to prepare an organic film photosensitive film with a linear dynamic range up to 81dB. Resistors, and a voltage divider that is extremely sensitive to weak light irradiation was obtained, which laid the foundation for future weak light detectors and light detection circuits constructed with 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 Patents(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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