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Tin-based perovskite and its preparation method, solar cell

A perovskite, tin-based technology, applied in the field of solar cells, can solve problems such as low stability

Active Publication Date: 2021-01-15
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 its preparation method, solar cell
  • Tin-based perovskite and its preparation method, solar cell
  • Tin-based perovskite and its preparation method, 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 solution.

[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 present invention provides a tinyl perovskite and its preparation methods, solar cells, involving the field of solar cell technology.The present invention proposes a preparation method for tinyl ingot ore, including: CH 3 Nh 3 SNA X B 3‑X Ultrasonic treatment with the first mixture of the first solution, where: A is CL, BR or i; B is CL, BR or i.The first solution includes one or more types of dichloromethane, polyethylene pyrirol, acetylene, and polyethylene glycol.CH after this method processing 3 Nh 3 SNA X B 3‑X The degree of crystallization is higher, the perovskite structure is more complete, the first solution can promote CH 3 Nh 3 SNA X B 3‑X The formation and crystallization, the CH after the ultrasound processing 3 Nh 3 SNA X B 3‑X The knot is more stable.The first solution can also increase CH 3 Nh 3 SNA X B 3‑X Hydrophobic ability, so as to improve CH 3 Nh 3 SNA X B 3‑X Stability in the air.

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 because of 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 optimization of device structure and process. However, due to the high toxicit...

Claims

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Application Information

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Patent Type & Authority Patents(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