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Method for preparing perovskite thin film through low temperature quenching and application of perovskite thin film

A technology of perovskite and perovskite precursors, applied in the field of solar cells, can solve the problems of hindering the industrialization of perovskite cells, poor film uniformity, backwardness, etc., and achieve high photoelectric conversion efficiency and stability, high Absorption coefficient and carrier mobility, the effect of avoiding solvent turbulence

Pending Publication Date: 2019-12-20
上海黎元新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current perovskite thin film is usually prepared by spin coating method. Although the efficiency is high, the area is small, and it is mainly used in the laboratory, and it mainly relies on anti-solvents such as chlorobenzene and toluene, which are highly toxic. Other methods include vacuum evaporation. Plating, scraping, spraying, and steam-assisted methods can prepare large-area films, but they are limited by the turbulence and volatilization of organic solvents during high-temperature annealing, so the uniformity of the prepared films is poor, leading to the current The efficiency of large-area perovskite modules lags far behind small-area devices, hindering the industrialization of perovskite cells

Method used

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  • Method for preparing perovskite thin film through low temperature quenching and application of perovskite thin film
  • Method for preparing perovskite thin film through low temperature quenching and application of perovskite thin film
  • Method for preparing perovskite thin film through low temperature quenching and application of perovskite thin film

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Embodiment 1

[0029] The invention provides a method for preparing a perovskite film by low-temperature quenching, comprising the following steps:

[0030] (1) Configure the perovskite precursor solution: MAI and PbI 2 Dissolve in DMSO solution according to the molar ratio of 1:1, the concentration is 1mol / L.

[0031] (2) Spin-coating method: pre-coat the perovskite precursor solution on a 2cm*2cm FTO substrate, and the spin-coating condition is 3000 rpm for 20 seconds.

[0032] (3) The pre-coated perovskite wet film was immersed in liquid nitrogen for 30 seconds, and then taken out.

[0033] (4) In order to prevent condensation of water vapor, dry the quenched film with 0.5MPa nitrogen for 30 seconds.

[0034] (5) Put the dried film on a heating platform and anneal for 10 min at 100° C. to obtain a perovskite film.

[0035] (6) Spin-coat PCBM on the perovskite film, anneal for 10 minutes, then spin-coat BCP, and anneal for 10 minutes.

[0036] (7) Evaporate a metal Ag electrode on the ...

Embodiment 2

[0038] The invention provides a method for preparing a perovskite film by low-temperature quenching, comprising the following steps:

[0039] (1) Configure the perovskite precursor solution: FAI and PbI 2 Dissolve in DMF solution according to the molar ratio of 1:1, the concentration is 1.2mol / L.

[0040] (2) Scrape coating method: pre-coat the perovskite precursor solution on a 2cm*2cm FTO substrate, and the scrape coating conditions are 100um scraper height and 3mm / s speed.

[0041] (3) The pre-coated perovskite wet film was immersed in liquid helium for 30 seconds, and then taken out.

[0042] (4) In order to prevent condensation of water vapor, dry the quenched film with 0.5MPa argon for 30 seconds.

[0043] (5) Put the dried film on a heating platform and anneal for 30 minutes at 170° C. to obtain a perovskite film.

[0044] (6) Spin-coat PCBM on the perovskite film, anneal for 10 minutes, then spin-coat BCP, and anneal for 10 minutes.

[0045] (7) Evaporate a metal A...

Embodiment 3

[0047] The invention provides a method for preparing a perovskite film by low-temperature quenching, comprising the following steps:

[0048] (1) Configure the perovskite precursor solution: mix CsI and PbI 2 Dissolve in DMF solution according to the molar ratio of 1:1, the concentration is 1.2mol / L.

[0049] (2) Scrape coating method: pre-coat the perovskite precursor solution on a 2cm*2cm FTO substrate, and the scrape coating conditions are 100um scraper height and 3mm / s speed.

[0050] (3) The pre-coated perovskite wet film was immersed in liquid helium for 30 seconds, and then taken out.

[0051] (4) In order to prevent condensation of water vapor, dry the quenched film with 0.5MPa argon for 30 seconds.

[0052] (5) Put the dried film on a heating platform and anneal for 30 minutes at 170° C. to obtain a perovskite film.

[0053] (6) Spin-coat PCBM on the perovskite film, anneal for 10 minutes, then spin-coat BCP, and anneal for 10 minutes.

[0054] (7) Evaporate a met...

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Abstract

The invention discloses a method for preparing a perovskite thin film through low temperature quenching and an application of the perovskite thin film and belongs to the technical field of solar cells. The method comprises the following steps of (1) coating a substrate with a perovskite precursor solution; (2) soaking the coated liquid film into a quenching medium for quenching; (3) taking out thequenched thin film and drying the quenched thin film by using a gas; and (4) annealing the dried thin film at certain temperature. According to the perovskite thin film prepared by using a low temperature quenching method, the green environmental quenching medium is adopted as a solvent extraction agent, no toxic anti-solvent is utilized and no surfactant is added, so that the prepared thin filmis compact and free of a hole and has very high absorption coefficient and carrier mobility, and a perovskite solar cell manufactured by adopting the thin film still has very high photoelectric conversion efficiency and stability.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a perovskite thin film by low-temperature quenching and its application. Background technique [0002] At present, energy and environmental problems are becoming more and more serious. Solar power generation is a safe and effective way to reduce environmental pollution and most likely replace traditional energy sources. In recent years, emerging perovskite solar cells have achieved a photoelectric conversion efficiency of more than 24.2%, and their application prospects are very broad. Perovskite has the following advantages: (1) It can be prepared by the whole solution method; (2) The preparation process is simple and the cost is low; (3) The charge diffusion length is up to micron level, and the charge life is long; (4) It can be prepared flexible and Transparent battery; (5) It has the characteristics of large light absorption coefficient, high carr...

Claims

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Application Information

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IPC IPC(8): H01L51/48
CPCH10K71/00H10K71/12H10K71/40Y02E10/549
Inventor 陈汉毕恩兵唐文涛
Owner 上海黎元新能源科技有限公司
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