a cs 3 cu 2 i 5 Ultraviolet detector and its film preparation method

A thin film and glass technology, applied in the field of lead-free perovskite thin film, can solve the problems of low luminous efficiency of blue light, easy decomposition, damage, etc., and achieve the effect of high fluorescence quantum efficiency, uniform and dense film, and low annealing temperature

Active Publication Date: 2021-10-29
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
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Problems solved by technology

First of all, in terms of luminescence, most of the research on the high luminous efficiency and stable green light film materials of prehalogen perovskite film materials, but the blue light luminous efficiency of lead halide perovskite film materials is not high, so the research on blue light film materials is not enough. Second, lead halide perovskite is unstable in the air and easy to decompose; the last and most critical point, lead halide perovskite contains lead atoms that are harmful to the environment and human beings, thus limiting its practical application

Method used

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  • a cs <sub>3</sub> cu <sub>2</sub> i <sub>5</sub> Ultraviolet detector and its film preparation method
  • a cs <sub>3</sub> cu <sub>2</sub> i <sub>5</sub> Ultraviolet detector and its film preparation method
  • a cs <sub>3</sub> cu <sub>2</sub> i <sub>5</sub> Ultraviolet detector and its film preparation method

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Embodiment 1

[0035] This embodiment provides a CS 3 Cu 2 I 5 The preparation method of the film, the specific steps are as follows:

[0036] 1) In the mixed solvent of CSI: 469 mg, CuI: 229 mg in DMF and DMSO, wherein DMF is 800 μl, DMSO is 200 μl, and heating is stirred at 60 ° C for 1 hour predecessor solution will completely dissolve;

[0037] 2) Separate the ITO glass by detergent, deionized water, acetone, alcohol, and isopropanol for 30 minutes, then Treatment of UV ozone treatment after 30 minutes;

[0038] 3) 60 μl of dissolved pre-fluid droplets with pipette is added to the center position of ITO glass, and after the predeflow flu flu flu flu flu flu flu flu flu flus is completely released, the spin coating is started, and the spin coating is 1000 transcothaute. The spin coating time is 15 seconds, the second stage spin coating speed is 4000 revolutions, and the spin coating time is 30 seconds, and at the last 5 seconds of the second stage, 100 μL of methyl acetate is rapidly added to...

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Abstract

The invention discloses a Cs 3 Cu 2 I 5 Ultraviolet detector and thin film preparation method, including adopting differential spin coating method to Cs 3 Cu 2 I 5 The precursor solution was coated on the ITO glass, and the anti-solvent was added dropwise in the last 5 seconds of spin coating; the differential speed was first slow and then fast. The film preparation technology of the present invention requires short annealing time, low annealing temperature, uniform and dense film, high transmittance, high fluorescence quantum efficiency, reaching 76.1%, and is stable in the air, stored in the air for 2 months After that, the luminous efficiency remained at 76%.

Description

Technical field [0001] The present invention belongs to the technical field of lead-free perovskite film, and in particular, the morphological control and preparation method thereof of the blue-ray-free-lead-free perovanium mine film is related to a CS. 3 Cu 2 I 5 Method for preparing the film. Background technique [0002] Because of its excellent photoelectric properties, lead halogen titanium ore is widely used in solar cells, LED lighting, laser, photoelectric detection, etc., is considered to be a known material having excellent foreground. First, in terms of light emitting, most of the green light film material having a higher luminous efficiency in the proliferate titanium oxide, and the blue-ray luminous efficiency of the lead-halorate titanium film material is not high, so the study of the blue-ray film material is not More; secondary, lead-halorate titanium-titanium-titanium mine is unstable and easy to decompose; the final is also the most critical, lead-halide titaniu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCH01L31/18Y02P70/50
Inventor 唐孝生曾凡菊胡伟张孟叶怀宇张国旗
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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