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Method of improving perovskite solar cell efficiency by using ionic liquid additive

A technology for solar cells and ionic liquids, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as difficult volatilization and device performance degradation, and achieve the effects of low cost, reduced roughness, and improved efficiency

Active Publication Date: 2017-06-09
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These high-boiling ionic liquids are difficult to volatilize and are difficult to be removed by solvents, resulting in a decrease in device performance (RSC Adv.2015, 5, 77495)

Method used

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  • Method of improving perovskite solar cell efficiency by using ionic liquid additive
  • Method of improving perovskite solar cell efficiency by using ionic liquid additive
  • Method of improving perovskite solar cell efficiency by using ionic liquid additive

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Embodiment 1

[0036] A method for improving the efficiency of perovskite solar cells by using ionic liquid additives, comprising the following processes:

[0037] (1) Preparation of precursor mixed solution

[0038] The molar ratio of lead acetate and methyl iodide is 1:3, and the ratio of lead acetate and methyl iodide is 2.5:1N,N-dimethylformamide molar ratio, and dissolved in N,N-dimethylformamide solution to form mixed solution; adding 1-ethylpyridinium chloride ionic liquid with a mass fraction of 1wt% as an additive to form a precursor mixed solution;

[0039] (2) Preparation of perovskite thin films

[0040] The precursor mixed solution was left standing at room temperature for 1 hour, spin-coated at 2000 rpm to form a film on a conductive glass substrate with PEDOT:PSS, and annealed on a hot stage at 90°C for 50 minutes to obtain a perovskite film;

[0041] (3) Deposition of electron transport layer

[0042] The electron transport layer is deposited on the surface of the perovskite...

Embodiment 2

[0046] A method for improving the efficiency of perovskite solar cells by using ionic liquid additives, comprising the following processes:

[0047] (1) Preparation of precursor mixed solution

[0048] The molar ratio of lead acetate and methyl iodide is 1:3, and the ratio of lead acetate and methyl iodide is 1.5:1 N,N-dimethylformamide molar ratio, and dissolved in N,N-dimethylformamide solution to form mixed solution; adding 1-ethylpyridinium chloride ionic liquid with a mass fraction of 3wt% as an additive to form a precursor mixed solution;

[0049] (2) Preparation of perovskite thin films

[0050] The precursor mixed solution was left standing at room temperature for 1 hour, spin-coated at 2000rpm on a conductive glass substrate with PEDOT:PSS, and annealed on a hot stage at 90°C for 30 minutes to obtain a perovskite film;

[0051] (3) Deposition of electron transport layer

[0052] The electron transport layer is deposited on the perovskite film by solution spin coati...

Embodiment 3

[0056] A method for improving the efficiency of perovskite solar cells using ionic liquid additives. It includes the following steps:

[0057] (1) Soak the corroded ITO conductive glass with detergent for 3-4 hours. Then ultrasonically clean in an ultrasonic cleaner for 15 minutes, then scrub with wet cotton, and finally rinse with ultrapure water. Dry the washed ITO substrate under an infrared lamp, and then use ultraviolet ozone (UV / O 3 ) after 15 minutes of processing, take it out for later use.

[0058] (2) Spin-coat PEDOT:PSS solution on the cleaned ITO glass, spin-coat at 3000rpm for 30s, and anneal at 120°C for 30min.

[0059] (3) Weigh lead acetate and methyl iodide solids with a molar ratio of 1:3, add 1-ethylpyridinium chloride with a mass fraction of 1wt% as an additive, dissolve in 0.5mL of N-dimethylformamide (DMF ) solution. In the atmospheric environment, the precursor solution was allowed to stand at room temperature for 1 h. 160 μL of precursor solution ...

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Abstract

The invention relates to a method of improving perovskite solar cell efficiency by using ionic liquid additive, and belongs to the organic optoelectronic technology field. The method comprises steps that (1) preparation of precursor mixed solution: lead acetate and methylammonium iodide are dissolved in an N,N-dimethylformamide solution to form the mixed solution; and 1-Ethylpyridinium chloride ionic liquid is adopted as the additive to prepare the precursor mixed solution; (2) preparation of a perovskite thin film: the precursor mixed solution is used to form a film by adopting a spin-coating technology, and is disposed on a conductive glass substrate provided with PEDOT:PSS, and annealing is carried out on a heating stage to acquire the perovskite thin film; (3) deposition of an electronic transmission layer: by adopting a thermal evaporation deposition way or a solution spin-coating way, the electronic transmission is deposited on the perovskite thin film; (4) evaporation deposition of a counter electrode: evaporation deposition of a metal aluminum electrode is carried out by adopting a vacuum evaporation film. The method has advantages of mild and controllable condition, simple preparation, low costs, and applicability in large-scale commercialized production.

Description

technical field [0001] The invention belongs to the field of organic photoelectric technology, in particular to a method for improving the efficiency of a perovskite solar cell by using an ionic liquid additive. Background technique [0002] At present, the research and development of solar cells has always been carried out around the following two key issues: 1) improving photoelectric conversion efficiency and life; 2) using new materials to reduce costs. At present, the highest efficiency of perovskite thin film solar cells has reached 22.1% (Energy Environ Sci. 2016, 9, 1989). [0003] The device structure of perovskite thin film solar cells includes mesoporous structure and planar structure. At present, the synthesis of mesoporous materials is mostly prepared by sol-gel method, and the size of the pores is affected by the preparation conditions (temperature, concentration, processing time, crystal shape and other factors). The crystal growth of metal halide perovskite...

Claims

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Application Information

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IPC IPC(8): H01L51/48
CPCH10K30/10Y02E10/549Y02P70/50
Inventor 姚聪杨利营
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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