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Perovskite cell based on composite electronic transmission layer and preparation method thereof

A technology of perovskite battery and electron transport layer, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as energy level mismatch, reduce interface recombination, etc., to improve efficiency, increase short-circuit current, and the preparation process is simple and effective. Effect

Inactive Publication Date: 2017-12-15
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of defect and energy level mismatch in the photogenerated electrons transferred from the perovskite light-absorbing layer to the electron-transport layer in the above-mentioned perovskite solar cell, the present invention proposes to compound different electronegative metal elements in the electron-transport layer to change the element Chemical state and electronic structure, which in turn cause changes in the energy level distribution of the electron transport layer to achieve an energy level arrangement that is more compatible with perovskite light absorption, so as to improve the efficiency of carrier separation and collection and reduce interface recombination, thereby improving the performance of perovskite solar cells. Photovoltaic performance

Method used

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  • Perovskite cell based on composite electronic transmission layer and preparation method thereof
  • Perovskite cell based on composite electronic transmission layer and preparation method thereof
  • Perovskite cell based on composite electronic transmission layer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Construction of perovskite solar cells with composite electronegative metal oxide electron transport layers

[0029] (1) Configuration (FAPbI 3 ) 0.83 (MAPbBr 3 ) 0.17 Precursor: PbI 2 The concentration is 1.1M, the concentration of FAI is 1M, the concentration of PbBr is 0.22M, the concentration of MABr is 0.2M, the solvent is dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), and the solvent volume ratio is 4:1 ; Configure a dense titanium dioxide precursor: a mixed isopropanol solution with a concentration of 0.23M titanium isopropoxide and 0.013M hydrochloric acid;

[0030] (2) Preparation of yttrium chloride ethanol solution: high-purity anhydrous grade YCl 3 The powder is dissolved in anhydrous ethanol solution, and the concentration is 2mg / ml solution;

[0031] (3) FTO conductive glass is used as the substrate and transparent electrode, the light transmittance is 80%, and the surface resistance is 15Ω;

[0032] (4) Deposition of composite electronegati...

Embodiment 2

[0051] Construction of perovskite solar cells with planar composite electronegative metal oxide electron transport layers

[0052] (1) Configuration (FAPbI 3 ) 0.83 (MAPbBr 3 ) 0.17 Precursor: PbI 2 The concentration is 1.1M, the concentration of FAI is 1M, the concentration of PbBr is 0.22M, the concentration of MABr is 0.2M, the solvent is dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), and the solvent volume ratio is 4:1 ; Configure a dense titanium dioxide precursor: a mixed isopropanol solution with a concentration of 0.23M titanium isopropoxide and 0.013M hydrochloric acid;

[0053] (2) Preparation of yttrium chloride ethanol solution: high-purity anhydrous grade YCl 3 The powder is dissolved in anhydrous ethanol solution, and the concentration is 2mg / ml solution;

[0054] (3) FTO conductive glass is used as the substrate and transparent electrode, the light transmittance is 80%, and the surface resistance is 15Ω;

[0055] (4) Deposition of planar composite...

Embodiment 3

[0060] Construction of methylamine-lead-iodide perovskite solar cells with composite electronegative metal oxide electron transport layer

[0061] (1) Configure MAPbI 3 Precursor: PbI 2 The concentration is 1.143M, the MAI concentration is 1.43M, the solvent is dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), and the solvent volume ratio is 9:1; the dense titanium dioxide precursor is configured: the concentration is 0.23M Mixed isopropanol solution of titanium isopropoxide and 0.013M hydrochloric acid;

[0062] (2) Preparation of yttrium chloride ethanol solution: high-purity anhydrous grade YCl 3 The powder is dissolved in anhydrous ethanol solution, and the concentration is 2mg / ml solution;

[0063] (3) FTO conductive glass is used as the substrate and transparent electrode, the light transmittance is 80%, and the surface resistance is 15Ω;

[0064] (4) Deposition of composite electronegative metal oxide electron transport layer: dense TiO configured in step (1) o...

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Abstract

The invention provides a perovskite cell based on a novel composite electronic transmission layer and a preparation method thereof and relates to the perovskite solar energy cell field. The perovskite cell comprises a substrate material, a transparent electrode, an electronic transmission layer, a perovskite light absorption layer, a cavity transmission layer and a counter electrode, wherein the novel composite electronic transmission layer can realize more reasonable energy level matching with the perovskite light absorption layer through the composite metal oxide composed of metal elements having different electronegativities by changing proportions of the metal elements having the different electronegativities and adjusting chemical states of the elements and electronic structures and energy level distribution of the electronic transmission layer, and photoelectron efficiency of separated collected perovskite is improved. The perovskite cell is advantaged in that the preparation process is simple and effective, the effect is obvious, efficiency of the prepared perovskite cell is improved to 18.26% from 15.10%, and the perovskite cell has application prospects.

Description

technical field [0001] The invention relates to the field of perovskite solar cells, in particular to a perovskite cell based on a novel composite electron transport layer and a preparation method thereof. Background technique [0002] Due to the rapid economic development, the sharp increase in population, and the continuous advancement of industrialization, energy shortage and environmental pollution have become two major problems facing mankind today. The rapid development of clean energy and renewable energy is currently the main solution. Solar cells convert light energy into electrical energy, are clean and pollution-free, and have very broad application prospects. Perovskite solar cells are a type of solar cells that are rapidly developing at present, with the characteristics of high efficiency, low cost, and simple preparation. After several years of rapid development, it has rapidly increased from 3.8% in 2009 to 22.1%. [0003] According to the structure, perovs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K30/10H10K2102/00Y02E10/549
Inventor 闫小琴李明华廖新勤郭艳
Owner UNIV OF SCI & TECH BEIJING
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