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

A technology of solar cells and short-circuit current, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of decreased filling factor, and the filling factor of perovskite cells has not been significantly improved. Reduce the effect of composite centers

Inactive Publication Date: 2019-09-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previous studies have used organic materials such as PMMA / 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. However, when using PMMA to passivate the interface, due to PMMA is an insulating material, which will inevitably lead to a decrease in fill factor (FF). When using PCBM to passivate the interface, the fill factor of perovskite cells has not been significantly improved.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of perovskite solar cells

[0044] (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;

[0045] (2) Add the PEDOT:PSS solution filtered through a 0.45 μm syringe filter dropwise onto the ITO treated in step (1), then spin-coat at 6000 rpm for 40 seconds, and finally anneal at 120°C for 15 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0046] (3) The composite layer formed by stacking ITO and PEDOT:PSS hole transport layer was preheated at 70 °C for 2 min, and then 50 μL of MAPbI at 70 °C 3-x Cl x The perovskite precursor solution was added dropwise to the PEDOT:PSS hole transport layer in step (2), first spin-coated at a speed of 1000rpm for 20s, then spin-coated at a speed of 3500rpm for 40s, and finally annealed at 95°C for 20min to obtain MAPbI 3-x Cl x perovskite light-absorbing layer, wherein, in...

Embodiment 2

[0050] Preparation of perovskite solar cells

[0051] (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;

[0052] (2) Add the PEDOT:PSS solution filtered through a 0.45 μm syringe filter dropwise onto the ITO treated in step (1), then spin-coat at a speed of 5000 rpm for 40 seconds, and finally anneal at 120°C for 15 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0053] (3) After preheating the composite layer formed by stacking ITO and PEDOT:PSS hole transport layers at 50°C for 3 min, add 120 μL of PTAA toluene solution with a concentration of 0.25 mg / mL dropwise to PEDOT:PSS in step (2). On the hole transport layer, then spin-coat at a speed of 6000rpm for 50s to obtain a PTAA layer with a thickness of 0.8 μm, wherein the molecular weight of PTAA is 1000-10000;

[0054] (4) The composite layer formed by stacking ITO, P...

Embodiment 3

[0058] Preparation of perovskite solar cells

[0059] (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;

[0060] (2) Drop the PEDOT:PSS solution filtered through a 0.45 μm syringe filter onto the ITO treated in step (1), spin-coat at 9000 rpm for 30 seconds, and finally anneal at 130°C for 20 minutes to prepare Obtain PEDOT:PSS hole transport layer;

[0061] (3) After preheating the composite layer formed by laminating the ITO and PEDOT:PSS hole transport layers at 70 °C for 1 min, add 120 μL of PTAA toluene solution with a concentration of 0.5 mg / mL dropwise to the PEDOT:PSS in step (2). On the hole transport layer, then spin-coat at a speed of 8000rpm for 40s to prepare a PTAA layer with a thickness of 1 μm, wherein the molecular weight of PTAA is 1000-10000;

[0062] (4) The composite layer formed by stacking ITO, PEDOT:PSS hole t...

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Abstract

The invention relates to a perovskite solar cell with a high short-circuit current, a high filling factor and high conversion efficiency and a preparation method thereof, and belongs to the technical field of photovoltaics. The perovskite solar cell sequentially comprises a substrate layer, a hole transport layer, a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] layer, an MAPbI<3-x>Cl<x> perovskite light absorption layer, an electron transmission layer and a metal back electrode layer from the bottom to the top in a laminated manner. Due to the existence of the poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] layer, the non-radiative recombination can be reduced, the filling factor can be improved, the hole transmission rate can be increased, the short-circuit current of the finally formed perovskite solar cell can be improved, and therefore, the conversion efficiency can be improved. The preparation method of the perovskite solar cell is simple and easy to operate, can be directly popularized on a large scale in industrial production, and has a potential application value in the aspect of solar cells.

Description

technical field [0001] The invention belongs to the technical field of photovoltaics, and in particular relates to a perovskite solar cell with high short-circuit current, high filling factor 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 mater...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/00H10K30/10H10K30/80Y02E10/549
Inventor 臧志刚王明周廷伟
Owner CHONGQING UNIV
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