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Preparation method of flexible photoelectric detector array

A technology of photodetectors and arrays, applied in photovoltaic power generation, electric solid-state devices, semiconductor/solid-state device manufacturing, etc., can solve the problems of colloidal quantum dots being unable to cluster a large number of clusters, poor air stability of materials, and compatibility of flexible substrates, etc., to achieve Improve the response rate and detection rate, ensure rapid crystallization, and reduce the effect of clusters

Active Publication Date: 2022-04-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a high-performance flexible photodetector array, which solves the problems of poor air stability of materials and slow carrier transport in the existing perovskite detector device technology, as well as colloidal There are a large number of cluster phenomena in quantum dots and the problem that current traditional detectors cannot be compatible with flexible substrates

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preparation example Construction

[0037] A method for preparing a flexible photodetector array, comprising the following steps:

[0038]S1, dissolve the lead bromide powder in the mixed solvent of isopropanol, propionic acid and n-butylamine, the volume ratio of isopropanol, propionic acid and n-butylamine is 1:1:1, and the molar concentration is 0.5mol / The lead bromide precursor solution of L;

[0039] S2, dissolving the cesium carbonate powder in propionic acid to prepare a cesium carbonate precursor solution with a molar concentration of 1.8mol / L;

[0040] S3, the lead bromide precursor solution and the cesium carbonate precursor solution prepared by S1 and S2 are added to the mixed solvent of isopropanol and n-hexane, and the volume ratio of isopropanol and n-hexane is 1:2 to prepare the molar concentration It is a homogeneous all-inorganic perovskite quantum dot precursor solution of 0.006mol / L;

[0041] S4. After stirring the homogeneous all-inorganic perovskite quantum dot precursor solution, carry o...

Embodiment 1

[0058] A method for preparing a flexible photodetector array, comprising the following steps:

[0059] S1, dissolve the lead bromide powder in the mixed solvent of isopropanol, propionic acid and n-butylamine, the volume ratio of isopropanol, propionic acid and n-butylamine is 1:1:1, and the molar concentration is 0.5mol / The lead bromide precursor solution of L;

[0060] S2, dissolving the cesium carbonate powder in propionic acid to prepare a cesium carbonate precursor solution with a molar concentration of 1.8mol / L;

[0061] S3, the lead bromide precursor solution and the cesium carbonate precursor solution prepared by S1 and S2 are added to the mixed solvent of isopropanol and n-hexane, and the volume ratio of isopropanol and n-hexane is 1:2 to prepare the molar concentration It is a homogeneous all-inorganic perovskite quantum dot precursor solution of 0.006mol / L;

[0062] S4. After stirring the homogeneous all-inorganic perovskite quantum dot precursor solution, carry ...

Embodiment 2

[0071] On the basis of Example 1, in the step S7, before using the one-step spin coating method to prepare the all-inorganic perovskite quantum dot film at room temperature, the all-inorganic perovskite quantum dot solution is first placed in an ultrasonic machine Processing, the processing frequency is 40Hz, and the processing temperature is 20-30°C, so that the all-inorganic perovskite quantum dots are kept in a vibrating state at all times, reducing the clusters between all-inorganic perovskite quantum dots, so that the all-inorganic perovskite quantum dots are uniformly Dispersed in the solvent.

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Abstract

The invention discloses a preparation method of a flexible photoelectric detector array, belongs to the technical field of photoelectric materials and devices, aims to provide the preparation method of the flexible photoelectric detector array, and overcomes the defects of poor material air stability and slow carrier transport in the existing perovskite detector device technology. In order to solve the problems that a large number of clusters exist in colloidal quantum dots and a conventional detector cannot be compatible with a flexible substrate, the invention provides an effective preparation method based on all-inorganic metal halogen all-inorganic perovskite quantum dots. A high-performance flexible photoelectric detector array is realized through low-frequency and room-temperature ultrasonic treatment and an accurate mechanical scribing method. The preparation method is suitable for the preparation process of the hyperspectral photoelectric detector.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials and devices, and in particular relates to a method for preparing a flexible photodetector array. Background technique [0002] With the rapid development of the Internet of Things and 5G, optoelectronic devices have widely served people's daily life, and people's demand for optoelectronic devices is also increasing. As one of the most important components in optoelectronic devices, photodetectors can effectively convert optical signals into electrical signals based on the photoelectric effect, and are widely used in the fields of optical communication, biological monitoring, environmental monitoring, and imaging. At present, commercial photodetector technology tends to be mature and stable. For example, silicon-based detectors have a responsivity of ~0.4A / W in the visible light range and a detection rate of ~10 10 Jones. However, due to its low absorption coefficient, the thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42H01L27/30
CPCY02E10/549
Inventor 巫江沈凯任翱博
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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