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Preparation method of stable and efficient perovskite solar cell

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of energy conversion efficiency reduction, solar cell performance degradation, yellowing, etc., and achieve improved light stability and high photoelectric conversion efficiency Effect

Pending Publication Date: 2022-03-04
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At 70 °C, Au can diffuse into the perovskite material, leading to significant degradation in the performance of solar cells
Inexpensive silver electrodes turn yellow within a few days of device fabrication compared to gold electrodes, and the color change is also accompanied by a significant reduction in energy conversion efficiency compared to reference devices using gold electrodes

Method used

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  • Preparation method of stable and efficient perovskite solar cell
  • Preparation method of stable and efficient perovskite solar cell
  • Preparation method of stable and efficient perovskite solar cell

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preparation example Construction

[0027] A method for preparing a stable and high-efficiency perovskite solar cell, specifically:

[0028] 1) Clean the FTO glass substrate and use laser to etch it;

[0029] 2) Immerse the UV-treated FTO glass into SnCl 2 Dilute and seal, prepare SnO by chemical bath deposition 2 Electron transport layer;

[0030] 3) Using the anti-solvent method on SnO 2 The perovskite active layer (FAPbI) was prepared on the electron transport layer 3 ) 0.95 (MAPbBr 3 ) 0.05 ;

[0031] 4) uniformly coating the Spiro-OMeTAD solution on the surface of the cooled perovskite active layer to form a hole transport layer;

[0032] 5) After the preparation of the hole transport layer is completed, the battery is transferred to a vacuum thermal evaporation apparatus, and the vacuum is evacuated to 2.0×10 -4 Pa, first use electron beam evaporation to evaporate metal nickel with a thickness of about 5-10nm, and then use thermal evaporation to evaporate a gold film with a thickness of about 75-8...

Embodiment 1

[0045] 1) The FTO glass substrate is cleaned and etched with a laser. Wipe the surface of the glass substrate etched by the femtosecond laser with a dust-free cloth dipped in detergent to remove the stains on the surface until the surface of the substrate can be soaked by water, and then put the substrate into Sonicate in the containers of ionized water and ethanol for 30 minutes each to ensure that the surface of the glass substrate is clean and free from stains. Then, dry the glass surface with an air gun, wrap it with a dust-free cloth for use, and put it in a UV cleaning machine for 15 minutes before use.

[0046] 3) SnO 2 Preparation of electron transport layer: measure 1.096g SnCl 2 2H 2 O, 5g urea, 5mL concentrated hydrochloric acid, 100μL thioglycolic acid were dissolved in 400mL distilled water, shake well and put in the refrigerator for later use. Take SnCl 2 solution 20mL, add 100mL H 2 Dilute with O, wash the cleaned FTO glass in a UV machine for 15min, pour ...

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Abstract

The invention discloses a preparation method of a stable and efficient perovskite solar cell, and the method comprises the steps: cleaning an FTO glass substrate, and carrying out the etching through laser; immersing the FTO glass subjected to UV treatment in a SnCl2 diluent, sealing the FTO glass, and preparing a SnO2 electron transport layer by using a chemical bath deposition method; preparing a perovskite active layer (FAPbI3) 0.95 (MAPbBr3) 0.05 on the SnO2 electron transport layer by adopting an anti-solvent method; uniformly coating the Spiro-OMeTAD solution on the surface of the cooled perovskite active layer to form a hole transport layer; evaporating a nickel / gold film as a top electrode by adopting a vacuum evaporation method; the method is simple in preparation process and high in repeatability and has commercialization prospects; the photoelectric conversion efficiency of the device is high, and the illumination stability of the device is remarkably improved; the vapor deposition method is adopted to prepare the combined top electrode, and later large-area preparation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and in particular relates to a preparation method of a stable and high-efficiency perovskite solar cell, especially an electrode preparation method. Background technique [0002] As fossil energy becomes more and more scarce, energy issues become more prominent. In order to slow down the depletion of fossil energy sources, renewable energy sources are becoming more and more important. Among the renewable energy sources, the clean energy solar energy is inexhaustible and has become one of the most promising energy sources at present. Among them, the photovoltaic material perovskite has many advantages such as strong light absorption coefficient, long carrier life, adjustable band gap, diversified process and simple production. From 3.8% photoelectric conversion efficiency used in solar devices in 2009 to the present The 25.5% efficiency has been widely concerned and researched by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42C23C14/30C23C14/24C23C14/18
CPCC23C14/30C23C14/24C23C14/18H10K71/15H10K71/12H10K30/15Y02E10/549
Inventor 黄福志貊艳平杨凯中卓玉铃
Owner WUHAN UNIV OF TECH