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All-inorganic perovskite solar cell with high open-circuit voltage and preparation method of solar cell

A technology of solar cells and open circuit voltage, applied in the field of solar cells, to achieve the effects of simple preparation process, improved photoelectric conversion performance, and high stability

Active Publication Date: 2020-08-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, there is no report on the use of substances containing both fluorine and carbonyl functional groups in the field of perovskite solar cells, and as interface passivation materials for perovskite layers.

Method used

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Examples

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Embodiment 1

[0029] In this embodiment, FTO conductive glass is used as the conductive substrate, and CsPbI 2 Br is used as a perovskite light absorbing layer material, trifluoroethyl methacrylate is used as an interface passivation layer material, and a carbon electrode is used as a back electrode layer to prepare a perovskite solar cell, including the following steps:

[0030] S1: Preparation of electron transport layer: Mix titanium tetrachloride and water in a ratio of 2:100 (dissolve 2 mL of titanium tetrachloride solution into 100 mL of ice-water mixture) to prepare TiO 2 colloid. After the cleaned conductive glass was treated with ultraviolet light for 10 minutes, it was placed in TiO at a temperature of 70°C. 2 Soak in the colloidal solution for 50 minutes, take it out, wash it with deionized water and absolute ethanol, and heat treat it at 200 °C for 60 minutes to obtain TiO 2 Dense layer, the electron transport layer on a conductive substrate.

[0031] S2: Preparation of perov...

Embodiment 2

[0036] In this embodiment, FTO conductive glass is used as the conductive substrate, and CsPbI 2 Br is used as a perovskite light absorbing layer material, trifluoroethyl methacrylate is used as an interface passivation layer material, and a carbon electrode is used as a back electrode layer to prepare a perovskite solar cell, including the following steps:

[0037] S1: Preparation of electron transport layer: Mix titanium tetrachloride and water in a ratio of 2:100 (dissolve 2 mL of titanium tetrachloride solution into 100 mL of ice-water mixture) to prepare TiO 2 colloid. After the cleaned conductive glass was treated with ultraviolet light for 10 minutes, it was placed in TiO at a temperature of 70°C. 2 Soak in the colloidal solution for 50 minutes, take it out, wash it with deionized water and absolute ethanol, and heat treat it at 200 °C for 60 minutes to obtain TiO 2 Dense layer, the electron transport layer on a conductive substrate.

[0038] S2: Preparation of perov...

Embodiment 3

[0043] In this embodiment, FTO conductive glass is used as the conductive substrate, and CsPbI 2 Br is used as a perovskite light absorbing layer material, trifluoroethyl methacrylate is used as an interface passivation layer material, and a carbon electrode is used as a back electrode layer to prepare a perovskite solar cell, including the following steps:

[0044] S1: Preparation of electron transport layer: Mix titanium tetrachloride and water in a ratio of 2:100 (dissolve 2 mL of titanium tetrachloride solution into 100 mL of ice-water mixture) to prepare TiO 2 colloid. After the cleaned conductive glass was treated with ultraviolet light for 10 minutes, it was placed in TiO at a temperature of 70°C. 2 Soak in the colloidal solution for 50 minutes, take it out, wash it with deionized water and absolute ethanol, and heat treat it at 200 °C for 60 minutes to obtain TiO 2 Dense layer, the electron transport layer on a conductive substrate.

[0045] S2: Preparation of perov...

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Abstract

The invention discloses an all-inorganic perovskite solar cell with high open-circuit voltage. A preparation method of the all-inorganic perovskite solar cell comprises the following steps: S1, preparing an electron transport layer on a clean conductive substrate; s2, preparing a perovskite light absorption layer on the electron transport layer prepared in the step S1; s3, spin-coating a trifluoroethyl methacrylate solution on the perovskite light absorption layer prepared in the step S2, and carrying out heat treatment to obtain a trifluoroethyl methacrylate film as an interface passivation layer; and S4, blade-coating a layer of carbon electrode as a back electrode layer on the interface passivation layer prepared in the step S3 by adopting a blade-coating method, and carrying out heat treatment to obtain the all-inorganic perovskite solar cell with high open-circuit voltage. According to the invention, trifluoroethyl methacrylate is used as an interface passivation material of the perovskite light absorption layer for the first time, and the coordination effect of fluorine ions, carbonyl functional groups and lead ions in the perovskite light absorption layer is utilized to realize interface passivation of the perovskite light absorption layer, so that the open-circuit voltage and photoelectric conversion performance of the cell are improved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to an all-inorganic perovskite solar cell with high open circuit voltage and a preparation method thereof. Background technique [0002] In recent years, perovskite solar cells (referred to as perovskite cells) have attracted increasing attention due to their excellent stability and optoelectronic performance. In the preparation process of perovskite batteries, non-radiative charge recombination and radiative recombination caused by interface defects are one of the reasons that limit the conversion efficiency of batteries, and interface engineering is an effective means to improve the interface defects of perovskite batteries. [0003] Related technologies have shown that strong ionic bonds can be formed between fluoride ions and lead ions, which can regulate crystal growth. In addition, the oxygen atom on the carbonyl group and the uncoordinated lead ion can form a coordination bond, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0216H01L31/0224
CPCH01L31/02167H01L31/022425H01L31/18Y02E10/50Y02P70/50
Inventor 吴素娟喻翔
Owner SOUTH CHINA NORMAL UNIVERSITY
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