Vacancy perovskite material-based solar cell and preparation method thereof

A technology of solar cells and perovskite materials, applied in the fields of photoelectric conversion and solar cells, can solve problems such as toxicity, poor stability of light-absorbing layers, and affect device applications, and achieve the effects of eliminating toxicity, improving light-absorbing ability, and improving environmental protection

Pending Publication Date: 2020-11-24
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method uses Cs x FA 1-x PB 3 The perovskite thin film is used as the perovskite light-absorbing layer, which leads to poor stability of the light-absorbing layer and the toxicity of Pb, which affects the further application of the device

Method used

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  • Vacancy perovskite material-based solar cell and preparation method thereof
  • Vacancy perovskite material-based solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1: Preparation of transparent conductive substrate using indium tin oxide ITO, electron transport layer using [6,6]-phenyl C61 Methyl butyrate PCBM, perovskite absorbing layer using Cs 2 SnI 6 , the hole transport layer uses Spiro-OMeTAD, and the top metal electrode uses silver Ag perovskite solar cells.

[0038] In step 1, a transparent conductive substrate is selected and pretreated.

[0039] 1.1) Select 400nm thick ITO as the transparent conductive substrate;

[0040] 1.2) Use glass cleaning solution, deionized water, acetone, isopropanol solution, and deionized water in order to clean the selected substrate ultrasonically for 20 minutes at a temperature of 50 degrees Celsius;

[0041] 1.3) Dry the glass surface of the ultrasonically cleaned substrate with nitrogen, and irradiate the glass surface with ultraviolet ozone for 20 minutes to obtain a pretreated transparent conductive substrate.

[0042] Step 2, preparing the electron transport layer of the per...

Embodiment 2

[0053] Example 2: Preparation of transparent conductive substrate using indium tin oxide ITO, electron transport layer ZnO, perovskite light absorbing layer using Cs 2 TiI 6-x Cl x A perovskite solar cell with copper thiocyanate (CuSCN) as the hole transport layer and Cu as the top metal electrode.

[0054] In step 1, select an ITO transparent conductive substrate and perform pretreatment on it.

[0055] The specific implementation of this step is the same as Step 1 of Example 1.

[0056] Step 2, preparing the electron transport layer of the perovskite solar cell.

[0057] 2.1) Add 2.95g of zinc acetate powder into 125mL of methanol solution, immediately raise the temperature to 70°C, and keep stirring to obtain transparent liquid A;

[0058] 2.2) Dissolve 1.48g of potassium hydroxide powder in 65mL of methanol solution at 70°C, and keep stirring to obtain mixed solution B;

[0059] 2.3) Add the mixed solution B dropwise to the transparent solution A while stirring, then ...

Embodiment 3

[0071] Example 3: Prepare the transparent conductive substrate using FTO, and the electron transport layer using [6,6]-phenyl C 61 Methyl butyrate PCBM, perovskite light absorbing layer using Cs 2 ZrI 6 , the hole transport layer uses poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]PTAA, and the top metal electrode uses Au perovskite solar cells.

[0072] In step A, a transparent conductive substrate is selected and pretreated.

[0073] A1) select 400nm thick FTO as the transparent conductive substrate;

[0074] A2) Pretreat the selected substrate:

[0075] The pretreatment implementation of this step is the same as the 1.2)-1.3) step of embodiment 1.

[0076] Step B, preparing an electron transport layer.

[0077] In the glove box, 20 mg of [6,6]-phenyl C 61 Methyl butyrate PCBM was dissolved in 1mL of chlorobenzene, stirred with a magnetic stirring table for 8 hours to fully dissolve, and spin-coated with a homogenizer at a speed of 2000rpm for 45s to obtain a prepared ...

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Abstract

The invention discloses a perovskite solar cell taking vacancy perovskite as a perovskite light absorption layer, and mainly solves the problems of poor toxicity, poor stability and low light absorption coefficient of an existing perovskite light absorption layer. The perovskite solar cell comprises a transparent conductive substrate, an electron transport layer, a perovskite absorption layer, a hole transport layer and a metal electrode from bottom to top. The perovskite light absorption layer adopts a composite material with a chemical formula of A2BXmY6-m composed of cations A, cations B, anions X and anions Y, wherein A is one or more of potassium, rubidium or cesium, B is one or more of molybdenum, tungsten, titanium, zirconium, hafnium, germanium, tin, iridium, platinum, palladium and gold, X and Y are chlorine, bromine or iodine, and m is 1-6. According to the invention, the toxicity of the perovskite light absorption layer is eliminated, the light absorption coefficient is improved, the photoelectric conversion performance and stability are improved, and the perovskite solar cell can be used for photoelectric conversion in the fields of photovoltaic transformer stations, artificial satellites, household solar energy and the like.

Description

technical field [0001] The invention belongs to the technical field of semiconductor devices, and further relates to a solar cell, which can be used for photoelectric conversion in fields such as photovoltaic substations, artificial satellites, and household solar energy. Background technique [0002] As a new type of solar cell, perovskite solar cells can be processed by the solution method, and can also be combined with the printing process, which greatly saves production costs. At the same time, perovskite solar cells are also light and thin, and can be deposited on flexible substrates. In recent years, the photoelectric conversion efficiency, preparation method and device structure of perovskite solar cells have been significantly improved. The structure includes a transparent conductive substrate, an electron transport layer, a perovskite absorbing layer, a hole Transport layer, metal electrodes. However, the perovskite absorbing layer currently used in solar cells st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K71/40H10K30/00H10K2102/00Y02E10/549Y02B10/10
Inventor 常晶晶林珍华郭雨佳苏杰张进成郝跃
Owner XIDIAN UNIV
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