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Preparation method of organic-inorganic hybrid perovskite thin film

A perovskite and thin film technology, which is applied in the field of preparation of organic-inorganic hybrid perovskite thin films, can solve the problems of difficult condition control, low utilization rate of raw materials, high requirements for gas phase method equipment, etc., and achieve uniform film layer and good compactness Effect

Inactive Publication Date: 2016-05-04
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing an organic-inorganic hybrid perovskite film in view of the above-mentioned technical analysis and existing problems, which overcomes the low utilization rate of raw materials and the inability to operate on a large area by the conventional liquid-phase spin-coating method. It also overcomes the defects that the gas phase method requires high equipment, conditions are difficult to control, and the stoichiometric ratio of the film layer is difficult to guarantee.

Method used

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Examples

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Effect test

Embodiment 1

[0019] (1) Use conductive glass as the substrate, use zinc powder and hydrochloric acid with a mass percentage concentration of 2% to corrode the parts that do not need to be deposited on the conductive surface of the FTO conductive glass, leave the area that needs to be deposited, and then use ethanol, acetone and Ultrasonic cleaning with deionized water for 10 minutes respectively, and drying in a constant temperature oven at 50° C. to prepare the treated substrate.

[0020] (2) Weigh 0.033g of lead nitrate and 0.039g of sodium thiosulfate pentahydrate, dissolve them in 100ml of distilled water to prepare a mixed solution, and adjust the pH of the mixed solution to 2.8 with acetic acid, which is the electrolyte.

[0021] (3) Use the substrate treated in step (1) as the cathode, and the graphite sheet as the anode, and insert them into the electrolyte prepared in step (2) in parallel, keep the constant temperature at 80°C and stir slowly with magnetic force, and adjust the cur...

Embodiment 2

[0026] Step (1) and step (2) are the same as embodiment 1.

[0027] (3) Use the substrate treated in step (1) as the cathode, and the graphite sheet as the anode, and insert them into the electrolyte prepared in step (2) in parallel, keep the constant temperature at 80°C and stir slowly with magnetic force, and adjust the current The density is 1.0mA / cm 2 , the electrodeposition time is 20 minutes, the substrate is taken out after the deposition is completed, cleaned with distilled water and then dried with nitrogen gas, and a lead sulfide film is deposited on the substrate.

[0028] (4) Use the lead sulfide film deposited in step (3) as a precursor, place it in a vacuum atmosphere furnace together with excess elemental iodine, and keep it warm at 120°C for 30 minutes. The iodine evaporates into iodine vapor, and the lead sulfide film is iodized. , to obtain a yellow lead iodide film.

[0029] (5) dissolving methylammonium iodide in isopropanol and preparing a solution with ...

Embodiment 3

[0031] Step (1) and step (2) are the same as embodiment 1.

[0032] (3) Use the substrate treated in step (1) as the cathode, and the graphite sheet as the anode, and insert them into the electrolyte prepared in step (2) in parallel, keep the constant temperature at 80°C and stir slowly with magnetic force, and adjust the current The density is 1.0mA / cm 2 , the electrodeposition time is 30 minutes, after the deposition, the substrate is taken out, cleaned with distilled water and then dried with nitrogen gas, and a lead sulfide film is deposited on the substrate.

[0033] (4) Use the lead sulfide film deposited in step (3) as a precursor, place it in a vacuum atmosphere furnace together with excess elemental iodine, and keep it warm at 120°C for 30 minutes. The iodine evaporates into iodine vapor, and the lead sulfide film is iodized. , to obtain a yellow lead iodide film.

[0034] (5) dissolving methylammonium iodide in isopropanol and preparing a solution with a concentrat...

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Abstract

The invention discloses a preparation method of an organic-inorganic hybrid perovskite thin film. Conductive glass is used as a substrate; a lead sulfide thin film is prepared by adopting an electro-deposition method; the lead sulfide thin film is used as a precursor; an iodine elementary substance is used as an iodizating agent for iodizating lead sulfide into lead iodide; and then the lead iodide reacts with methyl ammonium halide to obtain the perovskite thin film. The method disclosed by the invention can be operated in a large area; a film layer is controllable in area and shape, and an electro-deposition area and shape can be controlled by a method of corroding a conducting plane; a thickness of the film layer is controlled, and the thickness of the film layer can be conveniently controlled by regulating electro-deposition time; chemical components of the film layer are controllable, and the film layers with different components can be obtained by changing a ratio of I to Br in CH3NH3X solution, so that the perovskite thin films with different physical properties are obtained; and the obtained film layer is relatively uniform and has good compactness.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic semiconductors, and in particular relates to a method for preparing an organic-inorganic hybrid perovskite film. Background technique [0002] Perovskite-type organic-inorganic hybrid crystals (CH 3 NH 3 wxya 3 , X=I, Br, Cl) is an important optoelectronic semiconductor material with good photoelectric conversion performance, simple synthesis process, low cost, and great commercial potential, so it has become a research hotspot in the field of photovoltaic cells in recent years. In just a few years, the efficiency of perovskite batteries has increased from the original 3.1% to the current 20.1%, which has a tendency to compete with silicon-based batteries and copper indium gallium selenide batteries. [0003] The quality of the film in perovskite solar cells has a great influence on the performance of the cell, and the preparation of dense and uniform perovskite films is the prerequisite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46
CPCH10K85/00H10K30/00Y02E10/549
Inventor 利明袁小亲阮浩然杨阳博文
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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