Novel passivated perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor stability of perovskite solar cells, and achieve the effects of improving air stability, improving quality, and reducing non-radiative recombination.

Active Publication Date: 2019-06-14
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, the efficiency of perovskite solar cells has been continuously improved, from the efficiency of perovskite solar cells of 3.8% in 2009 to the certified efficiency of 22.7% in 2017, and then to the latest certified efficiency of 23.7%, the highest efficiency breakthrough in these efficiencies They are all formamidinyl perovskite solar cells, but the perovskite solar cells of this composition have poor stability under conditions such as light, oxygen, heat, and water.

Method used

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  • Novel passivated perovskite solar cell and preparation method thereof
  • Novel passivated perovskite solar cell and preparation method thereof
  • Novel passivated perovskite solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1, ultrasonically clean the cut FTO conductive glass substrate in acetone, isopropanol and ethanol for 5 minutes respectively, and blow dry with nitrogen gas to obtain the cleaned conductive glass substrate;

[0052] Step 2, using the hydrothermal insulation deposition method to deposit a layer of TiO on the etched FTO surface at 70 °C 2 as electron transport material;

[0053] Step 3, take tris(pentafluorophenyl)borane powder, add chlorobenzene solvent, make tris(pentafluorophenyl)borane solution, its concentration is 1.25mg / mL, and stir 7h on the stirring platform, obtain tris(pentafluorophenyl)borane solution, (Pentafluorobenzene) borane solution;

[0054] Step 4, weigh NH according to the molar ratio 0.85:0.15 2 CHNH 2 I and CH 3 NH 3 I powder, form mixture A after mixing, then mix A and PbI according to molar ratio 1:1 2 Mixed, add a mixed solution of DMF and DMSO with a volume ratio of 6:1 as a solvent, and stir at room temperature on a stirring table f...

Embodiment 2

[0060] Step 1, ultrasonically clean the cut ITO conductive glass substrate in acetone, isopropanol and ethanol for 10 minutes respectively, and blow dry with nitrogen gas to obtain the cleaned conductive glass substrate;

[0061] Step 2, using the hydrothermal insulation deposition method to deposit a layer of TiO on the etched FTO surface at 70 °C 2 as electron transport material;

[0062] Step 3, take tris(pentafluorophenyl)borane powder, add chlorobenzene solvent, make tris(pentafluorophenyl)borane solution, its concentration is 0.625mg / mL, and stir on the stirring table for 8h, obtain tris(pentafluorophenyl)borane solution, (Pentafluorobenzene) borane solution;

[0063] Step 4, weigh NH according to the molar ratio 0.85:0.15 2 CHNH 2 I and CH 3 NH 3 I powder, form mixture A after mixing, then mix A and PbI according to molar ratio 1:1 2 Mixed, add a mixed solution of DMF and DMSO with a volume ratio of 8:1 as a solvent, and stir at room temperature on a stirring tabl...

Embodiment 3

[0068] Step 1, ultrasonically clean the cut FTO conductive glass substrate in acetone, isopropanol and ethanol for 15 minutes respectively, and blow dry with nitrogen gas to obtain the cleaned conductive glass substrate;

[0069] Step 2, using the hydrothermal insulation deposition method to deposit a layer of TiO on the etched FTO surface at 70 °C 2 as electron transport material;

[0070] Step 3: Weigh tris(pentafluorophenyl)borane powder, add chlorobenzene solvent to prepare tris(pentafluorophenyl)borane solution with a concentration of 1.875mg / mL, and stir on a stirring table for 8h to obtain tris(pentafluorophenyl)borane solution. (Pentafluorobenzene) borane solution;

[0071] Step 4, weigh NH according to the molar ratio 0.85:0.152 CHNH 2 I and CH 3 NH 3 I powder, form mixture A after mixing, then mix A and PbI according to molar ratio 1:1 2 Mixed, add a mixed solution of DMF and DMSO with a volume ratio of 4:1 as a solvent, and stir at room temperature on a stirrin...

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Abstract

The invention discloses a novel passivated perovskite solar cell and a preparation method thereof. The perovskite solar cell optimizes the absorption of perovskite, so that a perovskite absorption layer contains an anti-solvent tris(pentafluorophenyl)borane to serve as a novel additive. On one hand, the addition of fluoride ions can change the crystallinity and the defect state of a perovskite film to form a high-quality perovskite film with a large grain size; the anti-solvent tris(pentafluorophenyl)borane can enhance the surface appearance of the perovskite and plays a passivation function at the grain boundary; and on the other hand, the fluoride ions can improve the hydrophobicity of the perovskite film and inhibit the phase change of the perovskite to better protect the perovskite from being destroyed by water, thereby further improving the air stability and the light stability of the cell to obtain a high-efficiency perovskite solar cell.

Description

【Technical field】 [0001] The invention belongs to the field of thin-film solar energy, and in particular relates to a novel passivated perovskite solar cell and a preparation method thereof. 【Background technique】 [0002] With the increasing demand for energy in the development of human society and the decrease of traditional fossil energy and environmental pollution, it is a great challenge to find a new renewable energy to replace traditional fossil energy in the future, so it is renewable and clean. Pollution and other advantages of solar cells are more and more people's attention. As a renewable energy source, solar energy is one of the important ways to meet the increasing energy demand worldwide. An effective way to convert solar energy into electrical energy is to prepare solar cells based on the photovoltaic effect. The development of new solar cells with high efficiency and low cost is the technical basis for the application of solar photovoltaic power generation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCY02E10/549Y02P70/50
Inventor 刘治科钱芳袁世豪蔡园韩玉赵欢刘生忠
Owner SHAANXI NORMAL UNIV
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