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A fully inorganic perovskite solar cell and a preparation method thereof

A technology of solar cells and inorganic calcium, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low open circuit voltage of all-inorganic perovskite solar cells, reduced photoelectric conversion efficiency of devices, and low photoelectric conversion efficiency. Enhanced extraction capability, improved open circuit voltage and device performance, and reduced electron-hole recombination effects

Inactive Publication Date: 2018-12-21
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its photoelectric conversion efficiency is much lower than that of organic / inorganic hybrid perovskite solar cells.
CsPbX prepared by solution processing method 3 The device structure of perovskite solar cells is ITO / tin oxide (SnO 2 ) / perovskite / 2,2',7,7'-tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD) / oxidation Molybdenum (MoO 3 ) / Silver (Ag), where SnO 2 Not optimal interfacial contact with perovskite, SnO 2 The conduction band energy level (-4.43eV) does not match the perovskite conduction band energy level (-4.16eV), and there is a large energy level gap, which leads to a certain extent that the open circuit voltage of the all-inorganic perovskite solar cell is relatively low. low, which reduces the photoelectric conversion efficiency of the device

Method used

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  • A fully inorganic perovskite solar cell and a preparation method thereof
  • A fully inorganic perovskite solar cell and a preparation method thereof
  • A fully inorganic perovskite solar cell and a preparation method thereof

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Embodiment 1

[0040] A method for preparing an all-inorganic perovskite solar cell device, comprising the steps of:

[0041] (1) The glass substrate coated with the ITO layer is ultrasonically cleaned with acetone, micron semiconductor detergent, deionized water, and isopropanol in sequence, and dried in a constant temperature oven for later use.

[0042] (2) Before use, place the dried substrate in step (1) in a petri dish, and place it in a vacuum plasma cleaner for 4 minutes. Then SnO 2 Solution (15wt%in H 2 O colloidal dispersion, purchased from Alfa Aesar) was spin-coated on the ITO layer, the spin-coating condition was 4000r / min for 30s, and the film thickness was 30nm to obtain SnO 2 electron transport layer.

[0043] (3) The n-butanol solution of ZnO nanoparticles (5 mg mL -1 ) spin-coated on the SnO prepared in step (2) 2 On the electron transport layer, a ZnO electron transport layer was prepared as the second electron transport layer. The spin coating rate was 5500r / min, the...

Embodiment 2

[0050] A method for preparing an all-inorganic perovskite solar cell device, comprising the steps of:

[0051] (1) The glass substrate coated with the ITO layer is ultrasonically cleaned with acetone, micron semiconductor detergent, deionized water, and isopropanol in sequence, and dried in a constant temperature oven for later use.

[0052] (2) Before use, place the dried substrate in step (1) in a petri dish, and place it in a vacuum plasma cleaner for 4 minutes. Then SnO 2 Solution (15wt%in H 2 O colloidal dispersion, purchased from Alfa Aesar) was spin-coated on the ITO layer, the spin-coating rate was 5000r / min, the spin-coating time was 30s, and the film thickness was 20nm to obtain SnO 2 electron transport layer.

[0053] (3) The n-butanol solution of ZnO nanoparticles (5 mg mL -1 ) spin-coated on the SnO prepared in step (2) 2 On the electron transport layer, a ZnO electron transport layer was prepared as the second electron transport layer. The spin coating rate ...

Embodiment 3

[0060] A method for preparing an all-inorganic perovskite solar cell device, comprising the steps of:

[0061] (1) The glass substrate coated with the ITO layer is ultrasonically cleaned with acetone, micron semiconductor detergent, deionized water, and isopropanol in sequence, and dried in a constant temperature oven for later use.

[0062] (2) Before use, place the dried substrate in step (1) in a petri dish, and place it in a vacuum plasma cleaner for 4 minutes. Then SnO 2 Solution (15wt%in H 2 O colloidal dispersion, purchased from Alfa Aesar) was spin-coated on the ITO layer, the spin-coating rate was 6500r / min, the spin-coating time was 30s, and the film thickness was 10nm to obtain SnO 2 electron transport layer.

[0063] (3) The n-butanol solution of ZnO nanoparticles (5 mg mL -1 ) spin-coated on the SnO prepared in step (2) 2 On the electron transport layer, a ZnO electron transport layer was prepared as the second electron transport layer, the spin-coating rate ...

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Abstract

The invention belongs to the technical field of solar cell devices, and discloses a fully inorganic perovskite solar cell and a preparation method thereof. The solar cell is a two-electron transport layer with SnO2 @ ZnO structure. The two-electron transport layer is prepared by spin-coating SnO2 solution and n-butanol solution of ZnO nanoparticles, and then thermal annealing. The most commonly used inorganic electron transport material ZnO nanoparticles are fabricated between the photoabsorbing layer and the SnO2 electron transport layer by a solution processing method, which forms an excellent step energy level, realizes better energy level matching, enhances electron extraction ability and greatly reduces the electron-hole recombination in the light absorbing layer. The open-circuit voltage and photoelectric conversion efficiency of fully inorganic perovskite solar cells are improved. Based on this two-electron transport layer structure, the fully inorganic perovskite solar cells with high photovoltaic performance can be obtained.

Description

technical field [0001] The invention belongs to the technical field of solar cell devices, and in particular relates to an all-inorganic perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, the problem of energy scarcity and environmental pollution has become more and more prominent, which has become a major obstacle to the sustainable development of human beings in the future, and vigorously developing and promoting clean and renewable energy technologies is the most effective means to solve these two problems at the same time. Among the many clean energies available on the earth, solar energy is the most abundant and fundamental form of energy. How to utilize solar energy more fully, effectively and at low cost has become the focus of attention of scientists from all over the world. Solar cells can directly convert solar energy into electrical energy for the use of human society, which is one of the best ways to effectively...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/42H01L51/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H10K71/00H10K30/35H10K2102/00Y02E10/549Y02P70/50
Inventor 叶轩立田晶晶薛启帆鄢磊刘梅月
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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