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A flexible self-driven wide-spectrum photodetector and preparation method thereof

A photodetector and self-driving technology, which is applied in the field of photodetectors, can solve the problems that photodetector self-drive and wide-spectrum detection cannot be realized at the same time, achieve good detection effect and broaden the application range

Active Publication Date: 2019-08-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current research has not been able to simultaneously realize the self-driving and wide-spectrum detection of photodetectors

Method used

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  • A flexible self-driven wide-spectrum photodetector and preparation method thereof
  • A flexible self-driven wide-spectrum photodetector and preparation method thereof
  • A flexible self-driven wide-spectrum photodetector and preparation method thereof

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preparation example Construction

[0027] A method for preparing a flexible self-driven wide-spectrum photodetector, comprising the following steps:

[0028] Step 1. Ultrasonic cleaning of carbon fibers in acetone, ethanol, and deionized water in sequence, and drying for later use; ultrasonic cleaning of copper wires in dilute hydrochloric acid, acetone, ethanol, and deionized water in turn, and drying for later use;

[0029] Step 2. After the carbon fiber cleaned in step 1 is cleaned by ultraviolet-ozone, the atomic layer deposition method is used to deposit 20-50nm thick TiO on its surface. 2 , and then placed in an argon atmosphere and annealed at a temperature of 450-550 ° C for 2 hours to obtain an electron transport layer;

[0030] Step 3, preparing a perovskite precursor solution, and then placing the carbon fiber with an electron transport layer obtained in step 2 in the perovskite precursor solution, adding solvents such as chlorobenzene, dichlorobenzene or ether to crystallize to form a perovskite lay...

Embodiment

[0034] A method for preparing a flexible self-driven wide-spectrum photodetector, specifically comprising the following steps:

[0035] Step 1. Select carbon fibers with a diameter of less than 0.5mm and copper wires with the same diameter as carbon fibers; ultrasonically clean the carbon fibers in acetone, ethanol, and deionized water for 20 minutes, place them in a vacuum drying oven, and dry them for later use; Ultrasonic cleaning in dilute hydrochloric acid, acetone, ethanol, and deionized water for 20 minutes, placed in a vacuum drying oven, and dried for later use;

[0036] Step 2. After the carbon fiber cleaned in step 1 is cleaned by ultraviolet-ozone for 20min, the atomic layer deposition method is used to deposit 30nm thick TiO on it. 2 , and then placed in an argon atmosphere and annealed at 500 ° C for 2 h to obtain TiO 2 Electron transport layer;

[0037] Step 3. Weigh 0.347g of lead iodide and 0.238g of methyl ammonium iodide and dissolve them in 2ml of γ-butyr...

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Abstract

A flexible self-driven wide-spectrum photodetector and a preparation method thereof belong to the technical field of photodetectors. The photodetector includes two parts, A and B, wherein part A includes carbon fiber, an electron transport layer and a perovskite light-absorbing layer sequentially formed on the surface of the carbon fiber, and part B includes a copper wire, and an electron transport layer sequentially formed on the surface of the copper wire. The barrier layer and the copper oxide layer, part A and part B are twisted to form a twisted pair structure, so that the perovskite light-absorbing layer is in contact with the copper oxide layer. A flexible self-driven wide-spectrum photodetector provided by the present invention can still work normally without external energy supply, realizing the self-driving of the detector; and can realize the wide spectrum of ultraviolet-infrared (350nm~1050nm) Detection, its detection spectral range can replace traditional silicon-based photodetectors, effectively broadening the application range of perovskite-based photodetectors.

Description

technical field [0001] The invention belongs to the technical field of photodetectors, and in particular relates to a flexible self-driven wide-spectrum photodetector and a preparation method thereof. Background technique [0002] Compared with traditional silicon-based photodetectors, photodetectors based on organic-inorganic perovskite (CH3NH3PBX3, X=Cl, Br, I) semiconductor materials have the advantages of low cost, fast response, high responsivity, and better detection. Sensitivity and other advantages have attracted the attention of more and more researchers. However, the current perovskite photodetectors require external energy supply to operate normally, and the energy utilization rate of the signal light source itself is not high, which greatly limits its application in the field of wearable electronic devices. Therefore, it is necessary to study and design a self-driven photodetector that is compatible with wearable electronic devices (flexible, weavable) and can e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/151Y02E10/549
Inventor 熊杰孙浩轩晏超贻邬春阳李言荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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