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Tin-based perovskite and preparation method thereof as well as solar cell

A perovskite and tin-based technology, applied in the field of solar cells, can solve the problem of low stability, achieve the effect of improving stability, improving humidity stability, and improving the structure of perovskite

Active Publication Date: 2018-08-07
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current tin-based perovskite materials have low stability, causing many adverse effects on their use.

Method used

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  • Tin-based perovskite and preparation method thereof as well as solar cell
  • Tin-based perovskite and preparation method thereof as well as solar cell
  • Tin-based perovskite and preparation method thereof as well as solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a tin-based perovskite, the preparation method of which mainly includes the following steps:

[0039] CH to be purchased 3 NH 3 SnICl 2 Perovskite mixed with polyvinylpyrrolidone to enable polyvinylpyrrolidone to immerse CH 3 NH 3 SnICl 2 Perovskite can be used to obtain the first mixed solution.

[0040] Ultrasonic treatment is performed on the first mixed liquid obtained from the above mixing. The ultrasonic treatment conditions are: ultrasonic temperature 20° C.; ultrasonic time 1.5 hours; ultrasonic power 100 W; ultrasonic frequency 40 KHz.

[0041] After the ultrasonic treatment, the first mixed solution is centrifuged, so that the solid in the first mixed solution can be separated, and the obtained solid is CH with more complete crystallization. 3 NH 3 SnICl 2 Perovskite.

Embodiment 2

[0043] This embodiment provides a tin-based perovskite, the preparation method of which mainly includes the following steps:

[0044] CH 3 NH 3 I and SnI 2 The mixture was ground for 20 minutes to give CH 3 NH 3 SnI 3 , where CH 3 NH 3 I and SnI 2 The molar ratio is 1:1.

[0045] CH 3 NH 3 SnI 3 Perovskite mixed with dichloromethane to allow dichloromethane to submerge CH 3 NH 3 SnI 3 Perovskite can be used to obtain the first mixed liquid.

[0046] Ultrasonic treatment is performed on the first mixed liquid obtained from the above mixing. The ultrasonic treatment conditions are: ultrasonic temperature 40° C.; ultrasonic time 3.5 hours; ultrasonic power 120 W; ultrasonic frequency 50 KHz.

[0047] After the ultrasonic treatment, the first mixed solution is centrifuged, so that the solid in the first mixed solution can be separated, and the obtained solid is CH with more complete crystallization. 3 NH 3 SnI 3 Perovskite.

Embodiment 3

[0049] This embodiment provides a tin-based perovskite, the preparation method of which mainly includes the following steps:

[0050] CH 3 NH 3 Br and SnBr 2 The mixture was triturated for 35 minutes to obtain CH 3 NH 3 SnBr 3 , where CH 3 NH 3 Br and SnBr 2 The molar ratio is 1:1.

[0051] CH 3 NH 3 SnBr 3 Perovskite mixed with dichloromethane to allow dichloromethane to submerge CH 3 NH 3 SnBr 3 Perovskite can be used to obtain the first mixed solution.

[0052] Ultrasonic treatment is performed on the first mixed liquid obtained from the above mixing. The ultrasonic treatment conditions are: ultrasonic temperature 30° C.; ultrasonic time 2 hours; ultrasonic power 110 W; ultrasonic frequency 45 KHz.

[0053] After the ultrasonic treatment, the first mixed solution is centrifuged, so that the solid in the first mixed solution can be separated, and the obtained solid is CH with more complete crystallization. 3 NH 3 SnBr 3 Perovskite.

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Abstract

The invention provides tin-based perovskite and a preparation method thereof as well as a solar cell and relates to the technical field of solar cells. The invention provides the preparation method ofthe tin-based perovskite; the preparation method comprises the following steps: carrying out ultrasonic treatment on a first mixed solution of CH3NH3SnAXB3-X and a first solution, wherein A is Cl, Bror I; B is Cl, Br or I. The first solution is prepared from one or more of dichloromethane, polyvinylpyrrolidone, acetonitrile and polyvinyl alcohol. The CH3NH3SnAXB3-X treated by the method has a higher crystallization degree and a perovskite structure is more complete; the first solution can be used for promoting the formation and crystallization of the CH3NH3SnAXB3-X and the structure of the CH3NH3SnAXB3-X subjected to the ultrasonic treatment is more stable. The first solution also can be used for improving the hydrophobic capability of the CH3NH3SnAXB3-X, so that the stability of the CH3NH3SnAXB3-X in the air is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a tin-based perovskite, a preparation method thereof, and a solar cell. Background technique [0002] With the advancement of science and technology, people pay more and more attention to the problem of environmental pollution. Clean energy, especially solar energy, is gaining traction. Perovskite solar cells have attracted the attention of scientists and commercial companies due to their high energy conversion efficiency and the ability to significantly reduce the cost of using solar cells. [0003] Currently, the efficiency of perovskite solar cells has grown to around 21%, mainly due to the CH 3 NH 3 PB 3 (Lead-based perovskite) materials with high visible light absorption efficiency, long exciton lifetime and diffusion length, high ambipolar mobility and low exciton binding energy, and device structure and process optimization. However, due to the high toxicity of le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/22H01L51/46
CPCC07F7/2284H10K85/30Y02E10/549Y02P70/50
Inventor 陈建清陈哲勰马爱斌宋丹赵新灿王家佳杨东辉江静华张立王屹峰李辰
Owner HOHAI UNIV