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A kind of inorganic perovskite solar cell using ammonium chloride modified zinc oxide as electron transport material and preparation method thereof

A technology for electron transport materials and solar cells, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of increasing the energy band gap of the perovskite light-absorbing layer, low battery efficiency, and reduced battery efficiency, so as to improve photoelectricity. The effect of conversion efficiency, improvement of open circuit voltage, and low preparation temperature

Active Publication Date: 2021-03-16
北京京通光能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the replacement of this cation will increase the energy band gap of the perovskite light-absorbing layer, resulting in a decrease in cell efficiency, and through the replacement of halogen elements, CsPbIBr 2 This hybrid halogen inorganic perovskite cell can achieve high efficiency while ensuring stability
After literature research, it is found that the current electron transport layer of this inorganic perovskite battery usually uses TiO that requires high temperature (greater than 400 °C) annealing. 2 As an electron transport layer, the ZnO electron transport layer prepared by the sol-gel method only needs to be annealed at 160 ° C, which can greatly reduce energy consumption and does not affect flexible applications, and the structure is ITO / ZnO / CsPbIBr 2 / Spiro-OMeTAD / Ag solar cells, not yet studied, but CsPbIBr using ZnO 2 The battery efficiency is not high, the main reason is that the work function of ZnO is relatively large, and the energy band is similar to that of CsPbIBr 2 Mismatch

Method used

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  • A kind of inorganic perovskite solar cell using ammonium chloride modified zinc oxide as electron transport material and preparation method thereof
  • A kind of inorganic perovskite solar cell using ammonium chloride modified zinc oxide as electron transport material and preparation method thereof
  • A kind of inorganic perovskite solar cell using ammonium chloride modified zinc oxide as electron transport material and preparation method thereof

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Embodiment 1

[0065] Preparation of inorganic perovskite solar cells using ammonium chloride modified zinc oxide as electron transport material

[0066] (1) Pretreatment of ITO

[0067] Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then UV-O 3 Treat for 30 minutes;

[0068] (2) Spin coating on the ITO treated by step (1) to prepare ammonium chloride modified zinc oxide electron transport layer

[0069] A. Mix zinc acetate, dimethoxyethanol and ethanolamine at a mass volume ratio of 1:15:254 and stir at 55°C for 0.5h, then at room temperature for 12h to obtain a zinc oxide precursor solution, wherein the mass volume The unit of the ratio is g:mL:μL;

[0070] B, in the ammonium chloride aqueous solution that the zinc oxide precursor solution obtained in step A is added, obtain ammonium chloride-zinc oxide mixed solution after mixing, the content of zinc acetate and ammonium chloride in...

Embodiment 2

[0082] Preparation of inorganic perovskite solar cells using ammonium chloride modified zinc oxide as electron transport material

[0083] (1) Pretreatment of ITO

[0084] Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then UV-O 3 Treat for 30 minutes;

[0085] (2) Spin coating on the ITO treated by step (1) to prepare ammonium chloride modified zinc oxide electron transport layer

[0086] A. Mix zinc acetate, dimethoxyethanol and ethanolamine at a mass volume ratio of 1:15:254 and stir at 60°C for 1 hour, then at room temperature for 24 hours to obtain a zinc oxide precursor solution, wherein the mass volume ratio The unit is g:mL:μL;

[0087] B, in the ammonium chloride aqueous solution that the zinc oxide precursor solution obtained in step A is added, obtain ammonium chloride-zinc oxide mixed solution after mixing, the content of zinc acetate and ammonium chloride in...

Embodiment 3

[0099] Preparation of inorganic perovskite solar cells using ammonium chloride modified zinc oxide as electron transport material

[0100] (1) Pretreatment of ITO

[0101] Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then UV-O 3 Treat for 30 minutes;

[0102] (2) Spin coating on the ITO treated by step (1) to prepare ammonium chloride modified zinc oxide electron transport layer

[0103] A. Mix zinc acetate, dimethoxyethanol and ethanolamine at a mass volume ratio of 1:15:254, then stir at 50°C for 2 hours, and then stir at room temperature for 36 hours to obtain a zinc oxide precursor solution, wherein the mass volume ratio The unit is g:mL:μL;

[0104] B, in the ammonium chloride aqueous solution that the zinc oxide precursor solution obtained in step A is added, obtain ammonium chloride-zinc oxide mixed solution after mixing, the content of zinc acetate and ammonium...

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Abstract

The invention relates to an inorganic perovskite solar cell using ammonium chloride modified zinc oxide as an electron transport material and a preparation method thereof, belonging to the field of photovoltaic technology. In the inorganic perovskite solar cell, ammonium chloride is used to modify zinc oxide As an electron transport material, it helps to form a high-quality perovskite absorbing layer, while ammonium chloride modified zinc oxide electron transport layer and CsPbIBr 2 The position of the conduction band of the perovskite light-absorbing layer is close, which can increase the open circuit voltage of the battery to a certain extent, thereby improving the photoelectric conversion efficiency of the solar cell. In addition, the present invention uses Spiro-OMeTAD with a small molecular structure as the hole transport layer, which can be combined with CsPbIBr 2 The perovskite light-absorbing layer maintains good contact for better hole carrier transport. The method has the advantages of low preparation temperature, convenient and simple preparation conditions, etc., so it can be directly prepared on a flexible substrate, so that solar cells with high photoelectric conversion efficiency can be prepared, and are suitable for scaled-up production.

Description

technical field [0001] The invention belongs to the technical field of photovoltaics, and in particular relates to an inorganic perovskite solar cell using ammonium chloride modified zinc oxide as an electron transport material and a preparation method thereof. Background technique [0002] With the increasingly urgent problems of environmental pollution and energy depletion, it has become a common concern of all mankind to find a renewable green new energy to replace traditional fossil energy. Solar cells directly convert solar energy into electrical energy, and have the advantages of environmental protection, safety, reliability, and long life, and have become one of the hot research fields at home and abroad. At present, silicon-based solar cells have the highest market share, but their long-term development is restricted due to reasons such as high cost and complicated process. Therefore, people are gradually turning their attention to new photovoltaic materials with lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42
CPCH10K71/00H10K85/615H10K30/30H10K2102/00Y02E10/549
Inventor 臧志刚王华昕赵双易
Owner 北京京通光能科技有限公司