Cs3Cu2I5 ultraviolet detector and film preparation method thereof

A thin-film, spin-coating technology, used in semiconductor devices, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of low blue light luminous efficiency, easy decomposition, damage, etc., and achieve high fluorescence quantum efficiency and uniform thin film. Densification, effect of short annealing time
CN110611014AActive Publication Date: 2019-12-24SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Publication Date
2019-12-24

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Abstract

The invention discloses a Cs3Cu2I5 ultraviolet detector and a film preparation method. A Cs3Cu2I5 precursor solution is applied to ITO glass by means of differential spin coating, and an anti-solventis added dropwise in the last 5 seconds of spin coating, and the differential speed is low first and then high. According to the film preparation technology, the annealing time needed is short, the annealing temperature is low, the film prepared is uniform and compact, the transmittance is high, the fluorescence quantum efficiency is high and reaches 76.1%, the film is kept stable in the air, andthe luminous efficiency is still kept at 76% after the film is stored in the air for 2 months.
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Description

technical field

[0001] The invention belongs to the technical field of lead-free perovskite thin films, in particular to the morphology control and preparation method of blue-light lead-free perovskite thin films, and in particular to a Cs 3 Cu 2 I 5 The method of film preparation. Background technique

[0002] Lead halide perovskites are widely used in solar cells, LED lighting, lasers, photoelectric detection and other fields due to their excellent photoelectric properties, and are considered to be a class of promising materials. 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. Secondly, lead halide perovskite is unstable in the air and easy to decompose; finally and the most critical point, lead ha...

Claims

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