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Perovskite solar cell with high short-circuit current and high conversion efficiency and preparation method thereof

A solar cell and short-circuit current technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as unfavorable commercialization and unfavorable environment, and achieve the effects of reducing dark current, reducing non-radiative recombination, and improving conversion efficiency

Active Publication Date: 2020-07-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Previous studies have used organic materials such as PMMA and PCBM to passivate the interface between the perovskite absorbing layer and the electron and hole transport layer to improve the performance of perovskite solar energy, but these organic molecules need to be dissolved in toluene, Toxic solvents such as chlorobenzene, which is not good for the environment and not good for commercialization

Method used

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  • Perovskite solar cell with high short-circuit current and high conversion efficiency and preparation method thereof
  • Perovskite solar cell with high short-circuit current and high conversion efficiency and preparation method thereof
  • Perovskite solar cell with high short-circuit current and high conversion efficiency and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0048] Preparation of perovskite solar cells with high short-circuit current and high conversion efficiency

[0049] (1) Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then treat it with UV for 30 minutes;

[0050] (2) Drop the PEDOT:PSS solution filtered through a 0.25 μm syringe filter onto the ITO treated in step (1), then spin-coat at 8000 rpm for 40 seconds, and finally anneal at 125°C for 15 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0051] (3) After preheating the composite layer formed by ITO and PEDOT:PSS hole transport lamination at 50 °C for 3 min, add 70 μL of 2-mercaptoimidazole isopropanol solution with a concentration of 1 mg / mL dropwise into step (2) PEDOT: On the PSS hole transport layer, then spin-coat 30s with the speed of 6000rpm, make the 2-mercaptoimidazole layer of thickness≤1nm;

[0052] (4) The composite layer formed by laminating...

Embodiment 2

[0057] Preparation of perovskite solar cells with high short-circuit current and high conversion efficiency

[0058] (1) Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then treat it with UV for 30 minutes;

[0059] (2) Add the PEDOT:PSS solution filtered through a 0.25 μm syringe filter dropwise onto the ITO treated in step (1), then spin-coat at 6000 rpm for 60 seconds, and finally anneal at 130°C for 25 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0060] (3) After preheating the composite layer formed by ITO and PEDOT:PSS hole transport lamination at 70 °C for 5 min, add 80 μL of 2-mercaptoimidazole isopropanol solution with a concentration of 3 mg / mL dropwise into step (2) On the PEDOT:PSS hole transport layer, spin coating 40s with the speed of 8000rpm then, make the 2-mercaptoimidazole layer of thickness≤1nm;

[0061] (4) The composite layer formed by ...

Embodiment 3

[0066] Preparation of perovskite solar cells with high short-circuit current and high conversion efficiency

[0067] (1) Wash the 15mm×15mm ITO with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 30 minutes, then dry it with a nitrogen gun, and then treat it with UV for 30 minutes;

[0068] (2) Drop the PEDOT:PSS solution filtered through a 0.25 μm syringe filter onto the ITO treated in step (1), then spin-coat at 4000 rpm for 50 seconds, and finally anneal at 120 ° C for 20 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0069] (3) After preheating the composite layer formed by ITO and PEDOT:PSS hole transport lamination at 60 °C for 4 min, add 60 μL of 2-mercaptoimidazole isopropanol solution with a concentration of 6 mg / mL dropwise into step (2) PEDOT: on the PSS hole transport layer, spin coating 35s with the speed of 4000rpm then, make the 2-mercaptoimidazole layer of thickness≤1nm;

[0070] (4) The composite layer formed by lamin...

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Abstract

The invention relates to a perovskite solar cell with high short-circuit current and high conversion efficiency and a preparation method thereof, and belongs to the technical field of photovoltaics. The perovskite solar cell is formed by stacking a substrate layer, a hole transport layer, a 2-mercapto imidazole layer, an FA0. 2MA0. 8PbI3-xClx perovskite light absorption layer, an electron transport layer and a metal back electrode in sequence from bottom to top. The 2-mercapto imidazole layer in the solar cell can well modify the defects on the FA0. 2MA0. 8PbI3-xClx perovskite light absorptionlayer, and the recombination center on the FA0. 2MA0. 8PbI3-xClx perovskite light absorption layer is reduced, so that the non-radiative recombination is reduced, and the dark current is reduced. Thenon-radiative recombination is reduced, and the hole transmission rate is increased, so that the short-circuit current of the perovskite solar cell is improved, and the conversion efficiency is improved. The preparation method of the perovskite solar cell is simple and easy to operate, can be directly popularized at a large scale in industrial production, and has the potential application value at the aspect of solar cells.

Description

technical field [0001] The invention belongs to the field of photovoltaic technology, and in particular relates to a perovskite solar cell with high short-circuit current and high conversion efficiency and a preparation method thereof. Background technique [0002] As a new energy source, solar cells convert solar energy into electrical energy that can be directly used through the photovoltaic effect. It has the advantages of safety, reliability, noise, pollution, and long service life. It has become a sustainable development strategy for the economy and military equipment of various countries. research topics. The current mainstream photovoltaic technology in the society uses silicon-based solar cells, but the high production cost (99.999% purity requirement) and complex process (high temperature required for processing) have become important factors restricting its development, while the second generation of amorphous silicon and other Thin film materials, due to factors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/12H10K71/441H10K85/30H10K30/10H10K30/88Y02E10/549Y02P70/50
Inventor 臧志刚王明
Owner CHONGQING UNIV
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