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Method for preparing organic perovskite methylamine lead iodide thin film from lead oxide thin film

A technology for preparing methylamino lead iodide and thin films is applied in the directions of lead organic compounds, ion implantation plating, coating, etc. Problems such as the inability to prepare a large area of ​​film, to achieve the effect of simple process and improved film quality

Active Publication Date: 2018-07-17
SOUTHEAST UNIV
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  • Summary
  • 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, vapor deposition method, two-step spin coating method, two-step vapor phase evaporation method and one-step PLD method, etc., but the preparation of large particles of organic calcium with uniform micron scale Titanium thin films are often difficult to control and realize, and the resulting methylamino lead iodide thin films have many cracks and defects, and most of them cannot be prepared in large areas for industrial production and practical applications

Method used

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Examples

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Effect test

Embodiment example 1

[0020] Using pulsed laser deposition technology, the cavity vacuum is at 10 -3 Pa level, the laser energy is about 400 millijoules, the number of pulses is 1000 pulses, and the frequency is 10 Hz. At room temperature, lead oxide films are grown on fluorine-doped tin dioxide films using lead oxide as a target. The lead oxide thin film and the porcelain boat of methyl ammonium iodide powder are sealed and placed in a box for 50 minutes at a constant temperature of 210 degrees Celsius. The organic perovskite methylamine lead iodide film sample was formed by reacting the lead oxide film with the atmosphere of methylammonium iodide. X-ray diffraction was used to confirm that the film finally grown by this method was a pure phase organic perovskite methylamine iodide For the lead oxide thin film, the crystal grains of the scanning electron microscope are observed to be very large and reach the order of microns, and the thickness of the film is determined to be about 1.55 microns thr...

Embodiment example 2

[0022] Using magnetron sputtering technology, the chamber vacuum is 10 -3 Pa, sputtering power 150 watts, growth time 20 minutes, using lead oxide as the target to grow lead iodide film on fluorine-doped tin dioxide film, the film thickness is 300 nanometers, and the grown lead oxide and methyl ammonium iodide Put the powder into a tube furnace and heat it at a constant temperature of 180 degrees Celsius for 15 minutes to allow the methylamine iodide atmosphere to react with the lead oxide 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 based on a lead oxide film.The method specifically comprises the steps that with lead oxide as a target material, the lead oxide film is prepared on a base in a sedimentation mode through the film preparation technology, the film thickness is controlled through the number of laser pulses, laser energy or sputtering power and time, the lead oxide film growing well and methyl ammonium iodide powder are put into a temperature controlling furnace and heated at the constant temperature of 160-260 DEG C for 5 minutes to 3 hours, and the formed methyl ammonium iodide gas and the lead oxide film on the base react successively to produce the methyl amino lead iodide film.The preparing technology is simple, and large films can be prepared; by means of high-temperature crystal, a uniform and compact entirety is formed by the produced methyl amino lead iodide film, crystalline grains penetrate through the whole film, crystal boundaries, cracks and defects are reduced, and therefore the methyl amino lead iodide film helps efficiency improvement and actual application and production of organic perovskite solar cells.

Description

technical field [0001] The invention relates to a method for preparing an organic perovskite methylamino lead iodide thin film through reaction based on a lead oxide thin film, and belongs to the technical field of solar cell material preparation. 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, vapor deposition method, two-step spin coating method, two-step vapor phase evaporation method and one-step PLD method, etc., but the preparation of large particles of organic calcium with uniform micron scale Ilmenite thin films are often difficult to control and realize, and the resulting methylamino lead iodide thin films have many cracks and defects, and most of them cannot be prepared in large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/24C23C14/08C23C14/58
CPCC07F7/24C23C14/08C23C14/5846
Inventor 徐庆宇朱凯张昊王嘉盛范奇董帅
Owner SOUTHEAST UNIV
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