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Method for preparing high-efficiency perovskite solar battery in moist air by introducing alkali metal ions

A technology of solar cells and alkali metal ions, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as complex preparation processes, achieve high photoelectric efficiency, improve photoelectric efficiency, and be easy to control

Inactive Publication Date: 2017-09-15
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the highest photoelectric conversion efficiency reported by this system is only 15.1%, which is still far from the 22% of pure halogen-based perovskite cells, and needs to be further improved.
At the same time, its preparation process needs to be sintered at a high temperature of 500 ° C to form porous TiO 2 Membranes, the preparation process is more complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The method for preparing a high-efficiency perovskite solar cell in humid air by introducing alkali metal ions in this embodiment includes the following steps:

[0062] S1: Add 5ml of titanium tetrachloride solution to 200ml of ice-water mixture to prepare TiO 2 colloid;

[0063] S2: After illuminating the clean FTO conductive glass with an ultraviolet lamp for 20 minutes, put it in TiO at a temperature of 70℃ 2 Soak in the colloidal solution for 100min, then take it out and rinse, heat treatment at 200℃ for 30min to obtain TiO 2 Dense layer

[0064] S3: Pb(SCN) 2 Dissolve in methyl sulfoxide and configure it as a solution with a concentration of 0.5g / ml; then add NaSCN to the solution, the amount of NaSCN added is the same as that of Pb(SCN) 2 The mass ratio is 0.5%;

[0065] S4: TiO prepared in step S2 2 The solution prepared in step S3 was spin-coated on the dense layer, and then heat-treated at 90°C for 30 min to obtain Pb(SCN) 2 membrane;

[0066] S5: In Pb(SCN) 2 On the fil...

Embodiment 2

[0071] The method for preparing a high-efficiency perovskite solar cell in humid air by introducing alkali metal ions in this embodiment includes the following steps:

[0072] S1: Add 5ml of titanium tetrachloride solution to 200ml of ice-water mixture to prepare TiO 2 colloid;

[0073] S2: After illuminating the clean FTO conductive glass with a UV lamp for 20 minutes, put it in TiO at a temperature of 70℃ 2 Soak in the colloidal solution for 50 minutes, then take it out and rinse, heat treatment at 200℃ for 30 minutes to obtain TiO 2 Dense layer

[0074] S3: Pb(SCN) 2 Dissolve in methyl sulfoxide and configure it as a solution with a concentration of 0.5g / ml; then add NaSCN to the solution, the amount of NaSCN added is the same as that of Pb(SCN) 2 The mass ratio is 1.5%;

[0075] S4: TiO prepared in step S2 2 The solution prepared in step S3 was spin-coated on the dense layer, and then heat-treated at 90°C for 30 min to obtain Pb(SCN) 2 membrane;

[0076] S5: In Pb(SCN) 2 On the film...

Embodiment 3

[0081] The method for preparing a high-efficiency perovskite solar cell in humid air by introducing alkali metal ions in this embodiment includes the following steps:

[0082] S1: Add 5ml of titanium tetrachloride solution to 200ml of ice-water mixture to prepare TiO 2 colloid;

[0083] S2: After illuminating the clean FTO conductive glass with an ultraviolet lamp for 20 minutes, put it in TiO at a temperature of 70℃ 2 Soak in the colloidal solution for 50min, then take it out and rinse, heat treatment at 200℃ for 30min to obtain TiO 2 Dense layer

[0084] S3: Pb(SCN) 2 Dissolve in methyl sulfoxide and configure it as a solution with a concentration of 0.5g / ml; then add NaSCN to the solution, the amount of NaSCN added and Pb(SCN) 2 The mass ratio is 2.5%;

[0085] S4: TiO produced in step S2 2 The solution prepared in step S3 was spin-coated on the dense layer, and then heat-treated at 90°C for 30 min to obtain Pb(SCN) 2 membrane;

[0086] S5: In Pb(SCN) 2 On the film, spin-coated a 10m...

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Abstract

The invention relates to a method for preparing a high-efficiency CH<3>NH<3>PbI<3-x>(SCN)<x>-based planar perovskite solar battery in moist air by introducing alkali metal ions to regulate and control the microstructure of a CH<3>NH<3>PbI<3-x>(SCN)<x>-based perovskite layer and improve stability of the battery. The method comprises the following steps of S1, preparing TiO<2> colloid; S2, depositing the TiO<2> colloid on a clean FTO conductive glass by a low-temperature solution method to prepare a TiO<2> compact layer; S3, preparing a methyl sulfoxide solution of Pb(SCN)<2> with concentration of 0.3-0.6g / ml, and adding alkali metal salt to the solution; S4, performing spin coating of the solution prepared in the step S3 on the sample prepared in the step S2, and performing heat treatment on the spin coating film at a temperature of 85-95 DEG C; S5, performing spin coating of an isopropanol solution of iodine methylamine on the film obtained in the step S4, performing spin coating repeatedly for six times, and performing heat treatment on the spin coating film to obtain the CH<3>NH<3>PbI<3-x>(SCN)<x> perovskite layer; S6, performing spin coating of a hole conduction layer on the CH<3>NH<3>PbI<3-x>(SCN)<x> perovskite layer prepared in the step S5; and S7, performing evaporation of a silver electrode on the sample prepared in the step S6 by adopting a thermal evaporation method to obtain the perovskite solar battery. The preparation process is simple, and the photoelectric conversion efficiency and the stability of the battery can be improved.

Description

Technical field [0001] The invention relates to the preparation and application fields of a perovskite solar cell with stable performance and high efficiency, in particular to a method for preparing a high-efficiency perovskite solar cell in humid air by introducing alkali metal ions to adjust the efficiency and stability of the cell Methods and applications. Background technique [0002] In recent years, perovskite solar cells have attracted much attention due to their high photoelectric conversion efficiency. Currently, the highest conversion efficiency of perovskite batteries certified by NREL in the United States has exceeded 22%. However, CH 3 NH 3 PbX 3 The (halogen) perovskite layer has poor stability in humid air and needs to be prepared in an inert gas environment with low humidity, and the inert gas glove box set is expensive. And if the perovskite solar cell can be prepared directly in humid air, not only the cost of the cell can be reduced, but also the operation du...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/30H10K30/151Y02E10/549
Inventor 吴素娟张宗宝陆旭兵刘俊明
Owner SOUTH CHINA NORMAL UNIVERSITY