Method for preparing perovskite layer of perovskite solar cell by using solid-mist interfacial reaction

A solar cell and solid-fog interface technology, applied in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve the problems of poor coverage and poor repeatability of perovskite films, and improve photoelectric conversion efficiency and reaction time Short, easy-to-equip effects

Inactive Publication Date: 2015-10-28
JILIN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of poor perovskite film coverage and poor repeatability of organometal halide perovskite solar cells prepared in the prior art, and proposes a method for preparing perovskite solar cells using solid-fog interface reactions. The method of perovskite layer, its specific method is as follows:

Method used

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  • Method for preparing perovskite layer of perovskite solar cell by using solid-mist interfacial reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Based on FTO conductive glass 1; Ti(OPr) 2 (AcAc) 2 It was diluted 10 times with ethanol, and 1.2 mL of the diluted solution was divided into six times on average, and sprayed and pyrolyzed with oxygen as a carrier at a substrate temperature of 450° C. to obtain a dense titanium dioxide film 2 . Mix the purchased titanium dioxide slurry (18NRT, Dyesol) and ethanol uniformly according to the mass ratio of 1:6 to obtain the diluted titanium dioxide slurry, take 50 μL, set the speed of the homogenizer to 5000r / min, and last for 30s. A film of uniform thickness was obtained on the dense titanium dioxide film, and then the prepared film was dried and sintered at a temperature of 80°C, 125°C, 350°C and 500°C, and the duration of each temperature was 30min; remove the film The non-titanium dioxide substances in the obtained porous membrane 3 composed of titanium dioxide nanoparticles.

[0025] Drop 50 μL of dimethylformamide solution of lead iodide with a concentration of 46...

Embodiment 2～7

[0030] The difference between Examples 2-7 and Example 1 is that the preheating, reaction and post-treatment temperatures during the preparation of the perovskite layer are set to 40, 60, 100, 120, 140 and 160°C.

[0031] The average efficiencies obtained based on the solar cells at reaction temperatures of 40, 60, 80, 100, 120, 140, and 160°C were: 10.9%, 14.8%, 15.1%, 15.0%, 14.6%, 11.9%, and 5.7%, respectively, It can be seen that the above-mentioned temperature setting as 80° C. is the optimum temperature.

Embodiment 8 and Embodiment 9

[0033] The difference between Example 8 and Example 9 and Example 1 lies in that the amount of methyl iodide solution used is 50 and 1000 μL, respectively.

[0034] The average efficiencies obtained based on the solar cells prepared with 50 and 1000 μL iodomethylamine solution were: 9.3% and 12.4%, respectively, and the optimal volume of iodomethylamine solution was 400 μL.

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Abstract

The invention provides a method for preparing a perovskite layer of a perovskite solar cell by using solid-mist interfacial reaction and belongs to the technical field of organic metal halide perovskite solar cells. In view of disadvantages of poor perovskite coverage rate and poor repeatability of an organic metal halide perovskite solar cell prepared by the prior art, the method prepares a lead iodide solid-phase membrane by means of a spin-coating method, and then enables an organic halide solution to be atomized to form solution mist to react with solid-mist-phase interface, thereby forming an organic metal halide layer with perovskite structure. The perovskite layer prepared through the method is good in crystallinity and high in coverage rate, and may improve the photoelectric conversion efficiency of the perovskite solar cell. The method is short in reaction time, easy to control in reaction condition, simple in equipment, good in maneuverability, good in repeatability, suitable for being popularized and applied in real production.

Description

technical field [0001] The invention belongs to the technical field of organic metal halide perovskite solar cells. Background technique [0002] In recent years, solar cells fabricated using organic-inorganic hybrid halides with a perovskite structure have attracted considerable attention due to their solution processability and high photoelectric conversion efficiency. This perovskite solar cell is mainly composed of an electron transport layer, a perovskite light absorbing layer and a hole transport layer. Among them, the morphology and crystallinity of the perovskite light-absorbing layer largely determine the performance of the final perovskite solar cell. At present, the one-step heating method is generally used to prepare perovskite films, but the disadvantage of this method is that the obtained perovskite films have poor morphology coverage and low repeatability. Some people also use the method of sequential deposition to prepare perovskite films. This method is mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48
CPCH10K71/12Y02E10/549
Inventor 刘喜哲夏祥
Owner JILIN UNIV
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