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Method for preparing CsPbI3 perovskite thin film and high-efficiency solar cell thereof in high-humidity environment and application of CsPbI3 perovskite thin film and high-efficiency solar cell thereof

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of limited commercial applications, relatively few studies on the interaction of perovskite precursor components, etc., to reduce environmental requirements, Excellent energy conversion efficiency and improved heat and humidity stability

Pending Publication Date: 2022-04-05
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the research on all-inorganic perovskite solar cells is mainly focused on optimizing the thin film and device structure, but there are relatively few studies on the interaction between the components of perovskite precursors.
Moreover, the currently used solvents N,N-dimethylamide (DMF) and N,N-dimethylsulfoxide (DMSO) are toxic solvents, which greatly limit their commercial application.

Method used

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  • Method for preparing CsPbI3 perovskite thin film and high-efficiency solar cell thereof in high-humidity environment and application of CsPbI3 perovskite thin film and high-efficiency solar cell thereof
  • Method for preparing CsPbI3 perovskite thin film and high-efficiency solar cell thereof in high-humidity environment and application of CsPbI3 perovskite thin film and high-efficiency solar cell thereof
  • Method for preparing CsPbI3 perovskite thin film and high-efficiency solar cell thereof in high-humidity environment and application of CsPbI3 perovskite thin film and high-efficiency solar cell thereof

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Embodiment 1

[0048] The present embodiment is methylamine acetate ionic liquid as CsPbI 3Preparation of all-inorganic CsPbI with low defect state density and large grain size by adjusting the ratio of lead iodide as the solvent of perovskite precursor solution 3 Perovskite thin films and their high-efficiency and stable perovskite solar cells, in order to fully understand the present invention in laboratory humidity conditions greater than 70%. It mainly includes the following steps:

[0049] Step 1) Sonicate the etched FTO conductive glass in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes respectively. After drying with nitrogen gas, dry in an oven at 100° C. for 30 minutes to obtain a clean FTO substrate.

[0050] Step 2) take cesium iodide, lead iodide and dimethylamine hydroiodide according to the ratio of 1:1.5:1 and take by weighing 108.1mg cesium iodide, 162.2mg lead iodide and 71.9mg dimethylamine hydroiodide Dissolve in 1mL methylamine...

Embodiment 2

[0063] The present embodiment is methylamine acetate ionic liquid as CsPbI 3 Preparation of all-inorganic CsPbI with low defect state density and large grain size by adjusting the ratio of lead iodide as the solvent of perovskite precursor solution 3 Perovskite thin films and their high-efficiency and stable perovskite solar cells, in order to fully understand the present invention in laboratory humidity conditions greater than 70%. It mainly includes the following steps:

[0064] Step 1) Sonicate the etched FTO conductive glass in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes respectively. After drying with nitrogen gas, dry in an oven at 100° C. for 30 minutes to obtain a clean FTO substrate.

[0065] Step 2) take cesium iodide, lead iodide and dimethylamine hydroiodide according to the ratio of 1:2:1 and take by weighing 108.1mg cesium iodide, 383.7mg lead iodide and 71.9mg dimethylamine hydroiodide Dissolve in 1mL methylamine ...

Embodiment 3

[0078] The present embodiment is methylamine acetate ionic liquid as CsPbI 3 Preparation of all-inorganic CsPbI with low defect state density and large grain size by adjusting the ratio of lead iodide as the solvent of perovskite precursor solution 3 Perovskite thin films and their high-efficiency and stable perovskite solar cells, in order to fully understand the present invention in laboratory humidity conditions greater than 70%. It mainly includes the following steps:

[0079] Step 1) Sonicate the etched FTO conductive glass in ethanol, ultrapure water plus cleaning agent, ultrapure water, and ethanol for 15 minutes respectively. After drying with nitrogen gas, dry in an oven at 100° C. for 30 minutes to obtain a clean FTO substrate.

[0080] Step 2) take cesium iodide, lead iodide and dimethylamine hydroiodide according to the ratio of 1:3:1 and take by weighing 108.1mg cesium iodide, 324.3mg lead iodide and 71.9mg dimethylamine hydroiodide Dissolve in 1mL methylamine ...

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Abstract

The invention relates to a method for preparing a CsPbI3 perovskite thin film and a high-efficiency perovskite solar cell in a high-humidity environment and application, and belongs to the field of optoelectronic materials and devices. According to preparation of the full-inorganic CsPbI3 thin film, a precursor solution with methylamine acetate as a solvent is spin-coated on an FTO conductive substrate with an electron transport layer by adopting a hot spin-coating technology, a compact and uniform perovskite thin film is prepared through gradient annealing, and the whole process is completed in air with the relative humidity of 40%-80%. And then spin-coating an interface modification layer and Spiro-OMeTAD on the thin film as a hole transport layer, and evaporating a MoO3 modification layer and a metal electrode by using a vacuum evaporation technology to complete the preparation of the device. The CsPbI3 all-inorganic perovskite solar cell prepared by the method in high-humidity air has excellent photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a preparation of CsPbI in air with a relative humidity of 40%-80% based on methylamine acetate ionic liquid as a precursor solvent by regulating the proportion of lead iodide in the precursor solution 3 Perovskite film and its high-efficiency perovskite solar cell method, especially a dense and uniform high-quality perovskite film and its solar cell device that can be prepared in high-humidity air with a relative humidity of 40%-80% The simple method belongs to the field of optoelectronic materials and technology. Background technique [0002] With the continuous development of society, the environmental problems caused by traditional fossil energy have attracted more and more attention, and the development of clean energy is imminent. With the continuous improvement of human demand for clean energy, solar power generation has attracted more and more attention. At present, the mainstream solar power generation devices on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCY02E10/549
Inventor 陈永华刘锦林越辛夏英东黄维
Owner NANJING UNIV OF TECH
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