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Method for preparing organic perovskite methyl amino lead iodide film by two-step method

A technology of methylamine lead iodide and methylamine iodide, which is applied in the field of two-step preparation of organic perovskite methylamine lead iodide thin films, which can solve the difficult-to-control and unsuitable large-area thin film preparation industry Production and practical application and other issues, to achieve the effect of simple process

Active Publication Date: 2016-07-20
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The general preparation methods include methylamino lead iodide one-step spin coating method, gas phase evaporation method, two-step spin coating method, two-step gas phase evaporation method and one-step PLD method, etc., but the preparation of large particle organic perovskite films with uniform size It is often difficult to control, and most of them are not suitable for the preparation of large-area thin films for industrial production and practical applications

Method used

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  • Method for preparing organic perovskite methyl amino lead iodide film by two-step method
  • Method for preparing organic perovskite methyl amino lead iodide film by two-step method
  • Method for preparing organic perovskite methyl amino lead iodide film by two-step method

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Embodiment example 1

[0021] Using pulsed laser deposition technology, the cavity vacuum is 10 -3 Pa, laser energy 400 millijoules, pulse number 1000 pulses, using lead iodide as the target material to grow lead iodide film on fluorine-doped tin dioxide film, the film thickness is about 1.6 microns ( figure 1 ), put the grown lead iodide and methyl ammonium iodide powder into a tube furnace and heat at a constant temperature of 180 degrees Celsius for 20 minutes, allowing the methyl amine iodide atmosphere to react with the lead iodide film on the substrate to generate methylamine Lead iodide thin film, utilize X-ray diffraction to confirm that the thin film that this method grows is the organic perovskite methylamine lead iodide thin film of pure phase ( figure 2 ), using a scanning electron microscope to observe the cross-section to determine that the thickness of the film is about 3 microns, the crystal grains are very large, and basically run through the thickness of the entire film ( image ...

Embodiment example 2

[0023] Using magnetron sputtering technology, the chamber vacuum is 10 -3 Pa, sputtering power 150 watts, growth time 20 minutes, use lead iodide as target material to grow lead iodide film on fluorine-doped tin dioxide film, film thickness 500 nanometers, grow good lead iodide and methyl iodide Put the amine powder into a tube furnace and heat it at a constant temperature of 180 degrees Celsius for 15 minutes, so that the methylamine iodide atmosphere reacts with the lead iodide film on the substrate to form an organic perovskite methylamine lead iodide film.

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Abstract

The invention discloses a method for preparing an organic perovskite methyl amino lead iodide film by a two-step method. The method comprises the following specific steps: a film preparation technology (pulse laser deposition, magnetron sputtering and the like) is used for depositing on a substrate with lead iodide as a target to prepare a lead iodide film; the thickness of the film is controlled through the laser pulse number or the sputtering power and time; then, the grown lead iodide film and methyl amine iodide powder are put in a temperature control furnace for heating at constant temperature of 150-280 DEG C by 5 minutes to 5 hours; and a methyl amine iodide atmosphere and the lead iodide film on the substrate are reacted to generate the methyl amino lead iodide film. The method is simple in preparation process, and can realize the preparation of large-area film; and film grains grown by using the method substantially penetrate through a film growing direction, so that the improvement of organic perovskite solar cell efficiency and the industrial production and application are facilitated.

Description

technical field [0001] The invention relates to a method for an organic perovskite methylamine lead iodide thin film, in particular to a two-step method for preparing an organic perovskite methylamino lead iodide thin film, which belongs to the technical field. Background technique [0002] Methylamino lead iodide organic perovskite crystal form (ABX 3 ) organic iodide light-absorbing material, ABX 3 In the structure, A is a methylamine group (CH 3 NH 3 ), B is a metal lead atom, and X is iodine. The general preparation methods include methylamino lead iodide one-step spin coating method, gas phase evaporation method, two-step spin coating method, two-step gas phase evaporation method and one-step PLD method, etc., but the preparation of large particle organic perovskite films with uniform size It is often difficult to control, and most of them are not suitable for the preparation of large-area thin films for industrial production and practical applications. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/28C23C14/06H01L51/42H01L51/48H01L51/46
CPCC23C14/0694C23C14/28C23C14/35H10K85/00H10K30/00Y02E10/549Y02P70/50
Inventor 徐庆宇朱凯张昊范奇董帅
Owner SOUTHEAST UNIV
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