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Method for preparing a CH3NH3PbI3 perovskite thin film

A technology of perovskite and thin film, applied in the field of screen printing, to achieve the effect of simple production process

Inactive Publication Date: 2017-09-08
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a major lack of perovskite precursor slurries that are stable in room temperature and air environments

Method used

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  • Method for preparing a CH3NH3PbI3 perovskite thin film
  • Method for preparing a CH3NH3PbI3 perovskite thin film
  • Method for preparing a CH3NH3PbI3 perovskite thin film

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0017] A method for preparing large-scale large-scale perovskite film mainly involves stable perovskite precursor slurry, screen printing technology, and direct reaction of lead oxide with methamidodine to produce perovskite.

[0018] The specific steps include:

[0019] (1) In Pb(NO 3 ) 2 In the solution, gradually add NaBH 4 The solution reduces the lead nanoparticles, and then the oxidant NaClO is added to further generate lead-containing nanoparticles.

[0020] (2) Mix the above-mentioned nanoparticles with a certain amount of ethyl cellulose, terpineol, ethanol, etc., and the mass ratio is about 1: (0.1 ~ 0.6): (3 ~ 10): (1 ~ 10), stir well, and then Grind and prepare a slurry.

[0021] (3) Screen printing the above-mentioned paste on a substrate (such as FTO conductive transparent glass). Annealing forms a lead oxide film, wherein the annealing temp...

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Abstract

The invention discloses a method for preparing a CH3NH3PbI3 perovskite thin film on a large scale, and mainly relates to stable perovskite precursor paste and perovskite generated by reaction of lead oxide and a methylamine iodine solution by a screen printing technology. A lead-containing nanometer structure is prepared, the stable paste is prepared, a lead oxide thin film is formed by combining a screen printing thin film and a subsequent annealing process, and the perovskite thin film is generated by reaction of the lead oxide thin film and the methylamine iodine solution.

Description

Technical field [0001] The invention relates to a preparation of CH 3 NH 3 PbI 3 The method of perovskite film belongs to the field of stable perovskite precursor slurry and screen printing technology. Background technique [0002] Perovskite CH 3 NH 3 PbX 3 (X=Cl,Br,I) has the advantages of nearly perfect crystal structure, adjustable energy level, extremely high light absorption coefficient and particle mobility, etc. It has excellent performance in solar cells, light-emitting diodes, photoelectric detection and other fields. performance. Perovskite CH3NH 3 PbX 3 (X=Cl,Br,I) materials are a hot spot in recent years. However, at present, spin coating or evaporation methods are mainly used to prepare perovskite films. The spin coating method is only suitable for the preparation of small-area perovskite films, and cannot be produced on a large scale and in a large area, which is an obstacle restricting the development of perovskite devices. The evaporation method seems to be su...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/13H10K30/10Y02E10/549
Inventor 楚亮李兴鳌毛巍威王兴福
Owner NANJING UNIV OF POSTS & TELECOMM