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Doped perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of photoelectric conversion efficiency and stability loss of cells

Active Publication Date: 2022-03-04
HUANENG NEW ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current perovskite is an ionic crystal, and its common components such as iodide ions (I-), lead ions (Pb+), methylamine ions (MA+) are easily combined with oxygen and water molecules in the air during the preparation process and device service process. Combined to produce a polarization reaction, the loss of photoelectric conversion efficiency and stability of the battery

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  • Doped perovskite solar cell and preparation method thereof
  • Doped perovskite solar cell and preparation method thereof
  • Doped perovskite solar cell and preparation method thereof

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[0038] The present invention also provides a preparation method of a doped perovskite solar cell, comprising the following steps:

[0039] A) depositing the first charge transport material on the substrate, and obtaining the first charge transport layer after annealing;

[0040] B) coating a doped perovskite precursor solution on the surface of the first charge transport layer, and obtaining a passivated perovskite layer after annealing;

[0041] The doped perovskite precursor solution includes inorganic salts, organic salts, self-healing polymers and solvents;

[0042] C) depositing a second charge transport material on the passivation perovskite layer to obtain a second charge transport layer;

[0043] D) Evaporating an electrode layer on the surface of the second charge transport layer to obtain a doped perovskite solar cell.

[0044]In the present invention, the substrate is preferably firstly cleaned with ethanol, isopropanol and acetone for 30-40 minutes, and dried wit...

Embodiment 1

[0062] Step 1, wash 1.5*1.5cm indium tin oxide (ITO) glass with ethanol, isopropanol (IPA) and acetone for 30 minutes respectively, and blow dry with a nitrogen gun.

[0063] Step 2, the purchased tin dioxide (SnO 2 ) stock solution and ultrapure water according to the volume ratio of 1:5 diluted, fully stirred to obtain SnO 2 Precursor solution takes 50 μL SnO 2 The precursor solution is evenly spread on the surface of the ITO conductive glass, and the parameters of the homogenizer are set to 4000rpm / s, and the time is 30s. Then place it on a hot stage at 150°C for 30 minutes to obtain SnO 2 film.

[0064] In step 3, the film obtained in step 2 was placed in a UV-ozone cleaner for 30 minutes, ready for subsequent spin coating.

[0065] Step 4: Weigh 461mgPbI 2 Dissolve 150 mg MAI in 600 μL of DMF, heat and stir at 70°C to fully dissolve, add 15 μL PMMA-PMBA to obtain a perovskite precursor solution.

[0066] Step 5: Take 50 μL of perovskite precursor solution and evenly...

Embodiment 2

[0071] Step 1, wash 4*4cm FTO thin film glass with ethanol, isopropanol (IPA) and acetone for 30 minutes respectively, and blow dry with nitrogen gun.

[0072] Step 2, using magnetron sputtering method to sputter a layer of dense NiO on the surface of FTO thin film glass x Thin film (thickness ~ 20nm), sputtering power is 80W, 30min.

[0073] In step 3, the film sputtered in step 2 is treated with oxygen plasma for 10 min.

[0074] Step 4, weighing 6g lead iodide (PbI 2 ) and 0.57g cesium bromide (CsBr), 1.15g methylamine iodide (FAI) were dissolved in 10mL N,N-dimethylformamide (DMF) solution, stirred at room temperature for 6h to dissolve, and 50μL PMMA-PMBA was added to obtain perovskite ore precursor solution. Take 140 μ of the above perovskite precursor solution and evenly distribute it between the base and the scraper, and set the thickness of the scraper to 300 μm to complete the film scraping. Then place it on a hot stage at 150°C for 25 minutes to obtain a perovsk...

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Abstract

The invention provides a doped perovskite solar cell. The doped perovskite solar cell comprises a substrate layer, a first charge transport layer, a passivated perovskite layer, a second charge transport layer and an electrode layer which are in contact in sequence, the passivated perovskite layer comprises a perovskite material and a self-repairing polymer; the self-repairing polymer is a polymethyl methacrylate-n-butyl acrylate copolymer. According to the perovskite solar cell, the self-repairing polymer containing the polar functional group carbonyl is added into the perovskite layer, the polymer can be coordinated with Pb < 2 + > or Sn < 2 + >, non-coordinated atoms at the grain boundary are passivated, and the function of passivating the grain boundary is achieved; meanwhile, the polymer has good self-repairing capacity, and the grain boundary strength in the polycrystalline perovskite thin film can be enhanced; in addition, the polymer has a hydrophobic property and can block water vapor invasion, so that the stability of perovskite is improved. The invention also provides a preparation method of the doped perovskite solar cell.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, in particular to a doped perovskite solar cell and a preparation method thereof. Background technique [0002] As a new generation of solar cells, organic-inorganic hybrid solar cells play an important role in the field of photoelectric conversion, but their stability has become an important "stuck neck" problem. The current perovskite is an ionic crystal, and its common components such as iodide ions (I-), lead ions (Pb+), methylamine ions (MA+) are easily combined with oxygen and water molecules in the air during the preparation process and device service process. Combined to produce a polarization reaction, the photoelectric conversion efficiency and stability of the battery are lost. The open-circuit voltage of perovskite solar cells is limited by the non-radiative recombination at the perovskite / carrier transport layer (CTL) interface, and overcoming the recombination loss at...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/42H01L51/48
CPCH10K30/10H10K30/88Y02E10/549
Inventor 肖平赵政晶赵志国赵东明秦校军张赟蔡子贺刘云
Owner HUANENG NEW ENERGY CO LTD
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