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Method for improving efficiency and stability of perovskite solar cell, and perovskite solar cell

A solar cell, perovskite technology, used in circuits, photovoltaic power generation, electrical components, etc.

Active Publication Date: 2019-03-29
南京烯勒光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many related researches and reports on perovskite solar cells at present, perovskite solar cells still face a series of problems to be solved urgently, among which stability is the core issue. In order to promote the PCE of perovskite solar cells to approach Shockley Queisser limitations, further research is necessary to eliminate defects in perovskite absorbers to improve device stability while increasing efficiency
Therefore, the control of defects in perovskite thin film layers is an important challenge and opportunity at present

Method used

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  • Method for improving efficiency and stability of perovskite solar cell, and perovskite solar cell
  • Method for improving efficiency and stability of perovskite solar cell, and perovskite solar cell
  • Method for improving efficiency and stability of perovskite solar cell, and perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, the FTO glass substrate was ultrasonically cleaned with acetone, isopropanol, and deionized water in sequence, followed by UV-ozone treatment for 20 minutes. Dilute 1 mL of titanium(IV) isopropoxide in 10 mL of ethanol, spin-coat on FTO at a rate of 6000 rpm for 30 s to prepare a dense layer (bl-TiO2), and then anneal at 450 ° C in air for 20 min. Dissolve commercially available paste (30NR-D, Dyesol) in ethanol (150 mg / mL) at 4000 rpm to prepare mesoporous TiO 2 (mp-TiO 2 ) layer, annealed in air at 450°C for 20 minutes to remove the organic part. Prepare the precursor solution (CsPbI 3 ) 0.05 (FAPbI 3 ) 0.79 (MAPbBr 3 ) 0.16, to deposit the perovskite layer in a two-step method, that is, drop 40 microliters of perovskite solution on the substrate, spin-coat at 1000rpm for 10s, and then spin-coat at 6000rpm for 20s, before the end of the second step of spin-coating 110 microliters of chlorobenzene solution containing α,β-COTh-OMeTAD (1mg / ml) was quickly ...

Embodiment 2

[0036] First, the FTO glass substrate was ultrasonically cleaned with acetone, isopropanol, and deionized water in sequence, followed by UV-ozone treatment for 20 minutes. Dilute 1 mL of titanium(IV) isopropoxide in 10 mL of ethanol, spin-coat on FTO at a rate of 6000 rpm for 30 s to prepare a dense layer (bl-TiO2), and then anneal at 450 ° C in air for 20 min. Dissolve commercially available paste (30NR-D, Dyesol) in ethanol (150 mg / mL) at 4000 rpm to prepare mesoporous TiO 2 (mp-TiO 2 ) layer, annealed in air at 450°C for 20 minutes to remove the organic part. Prepare the precursor solution (CsPbI 3 ) 0.05 (FAPbI 3 ) 0.79 (MAPbBr 3 ) 0.16 , to deposit the perovskite layer in a two-step method, that is, drop 50 microliters of the perovskite solution on the substrate, spin-coat at 1000rpm for 10s, then spin-coat at 6000rpm for 20 seconds, and finish the spin-coating in the second step In the first 5 seconds, 100 microliters of CB solution containing α,β-COTh-OMeTAD (1m...

Embodiment 3

[0037] Embodiment 3 (comparative example)

[0038] This embodiment is a positive structure device without small molecule passivation. The specific method is as follows: firstly, the FTO glass substrate is ultrasonically cleaned with acetone, isopropanol, and deionized water in sequence, and then UV-ozone treatment is performed for 20 minutes. Dilute 1 mL of titanium(IV) isopropoxide in 10 mL of ethanol, spin-coat on FTO at a rate of 6000 rpm for 30 s to prepare a dense layer (bl-TiO2), and then anneal at 450 ° C in air for 20 min. Dissolve commercially available paste (30NR-D, Dyesol) in ethanol (150 mg / mL) at 4000 rpm to prepare mesoporous TiO 2 (mp-TiO 2 ) layer, annealed in air at 450°C for 20 minutes to remove the organic part. Prepare the precursor solution (CsPbI 3 ) 0.05 (FAPbI 3 ) 0.79 (MAPbBr 3 ) 0.16 , to deposit the perovskite layer in a two-step method, that is, drop the perovskite solution on the substrate, spin-coat at 1000rpm for 10s, and then spin-coat...

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PUM

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Abstract

The invention discloses a method for improving efficiency and stability of a perovskite solar cell and the perovskite solar cell. By adding a small amount of hydrophobic organic micromolecules into ananti-solvent for preparing a perovskite light absorption layer, the efficiency of the perovskite solar cell and the stability of the perovskite solar cell in air under an unpackaged condition are improved. The perovskite solar cell provided by the invention is divided into a forwarding type and a reverse type according to different structures, and the perovskite light absorption layer is of an ABX3 structure. Results indicate that if the small molecules added into the anti-solvent are thiophene-containing structural units in the structure or conjugated small organic molecules containing any one atom of S, N and O element, the small molecules can play a role in reducing grain boundaries and surface defects of the perovskite layer in the two device structures, and finally achieve the purpose of improving the efficiency and stability of the perovskite solar cell.

Description

technical field [0001] The invention belongs to the technical field of photoelectric functional materials and devices, and specifically relates to a method for improving the efficiency and stability of a perovskite solar cell based on an organic small molecule interface passivation strategy and the perovskite solar cell. Background technique [0002] With the shortage of fossil energy and the increasing environmental pollution, the efficient conversion of clean and sustainable light energy into solar energy has become a concern of scientists. At present, in the field of solar cells, inorganic semiconductor materials represented by silicon have been industrialized, but their preparation costs are generally high, the production process will cause environmental pollution problems, and it is not conducive to the preparation of flexible devices, which can no longer meet the needs of the market. Require. [0003] Through solution processing, using roll-to-roll technology to achie...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/56H01L51/48
CPCH10K71/12H10K71/40H10K85/113H10K30/10Y02E10/549
Inventor 李公强赖雪孟飞
Owner 南京烯勒光电科技有限公司
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