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Highly-oriented two-dimensional hybrid perovskite thin film regulated and controlled by substrate and preparation method thereof

A high-orientation, perovskite technology, applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve the problem of disordered film grains, and achieve the effect of low raw material, simple preparation method and low energy consumption

Active Publication Date: 2018-09-14
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the current technology to take into account these two aspects at the same time, such as anti-solvent, annealing and adding additives, etc. can successfully prepare high-crystallinity flat large-grained perovskite films, but the orientation of the grains in the film is usually is disorderly

Method used

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  • Highly-oriented two-dimensional hybrid perovskite thin film regulated and controlled by substrate and preparation method thereof
  • Highly-oriented two-dimensional hybrid perovskite thin film regulated and controlled by substrate and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a method for preparing a highly oriented two-dimensional hybrid perovskite film regulated by a substrate includes the following steps:

[0025] (1) Pretreatment: Select FTO with a sheet resistance of 10Ω and a transmittance of 90% as the conductive glass substrate material, then use ethanol, isopropanol, acetone, and ethanol to ultrasonically clean for 20 minutes, and then use N 2 blow dry.

[0026] (2) Preparation of SnO 2 Nanosheet film: put the washed and dried FTO substrate into SnCl with a concentration of 5mmol / L 2 In the aqueous solution, react in a pressurized and airtight environment for 5h, and the reaction temperature is 150°C. After the reaction, take out the SnO 2 Nanosheet thin film samples were rinsed with deionized water and ethanol in turn, and rinsed with N 2 Blow dry, after N 2 After drying, the SnO 2 The nanosheet film samples were dried at 100°C for 20 minutes, and then left to cool to room temperature for later use ...

Embodiment 2

[0031] A method for preparing a highly oriented two-dimensional hybrid perovskite film regulated by a substrate, comprising the following steps:

[0032] (1) Pretreatment: Select ITO with a sheet resistance of 12Ω and a transmittance of 90% as the conductive glass substrate material, and then use ethanol, isopropanol, acetone, and ethanol to ultrasonically clean for 20 minutes, and then use N 2 blow dry.

[0033] (2) Preparation of SnO 2 Nanosheet film: put the cleaned and dried ITO substrate into SnCl with a concentration of 11.25mmol / L 2 In the aqueous solution, react in a pressurized and airtight environment for 6h, and the reaction temperature is 180°C. After the reaction, take out the SnO 2 Nanosheet thin film samples were rinsed with deionized water and ethanol in turn, and rinsed with N 2 Blow dry, after N 2 After drying, the SnO 2 The nanosheet thin film samples were dried at 100°C for 20 minutes, and then left to cool to room temperature for later use to prepare ...

Embodiment 3

[0038] A method for preparing a highly oriented two-dimensional hybrid perovskite film regulated by a substrate, comprising the following steps:

[0039] (1) Pretreatment: Select FTO with a sheet resistance of 15Ω and a transmittance of 90% as the conductive glass substrate material, then use ethanol, isopropanol, acetone, and ethanol to ultrasonically clean for 20 minutes, and then use N 2 blow dry.

[0040] (2) Preparation of SnO 2 Nanosheet film: put the washed and dried FTO substrate into SnCl with a concentration of 15mmol / L 2 In the aqueous solution, react in a pressurized and airtight environment for 8h, and the reaction temperature is 200°C. After the reaction, take out the SnO 2 Nanosheet thin film samples were rinsed with deionized water and ethanol in turn, and rinsed with N 2 Blow dry, after N 2 After drying, the SnO 2 The nanosheet thin film samples were dried at 100°C for 20 minutes, and then left to cool to room temperature for later use to prepare SnO with...

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Abstract

The invention relates to the technical field of manufacture of solar batteries, in particular to a highly-oriented two-dimensional hybrid perovskite thin film regulated and controlled by a substrate and a preparation method thereof. The perovskite thin film is a two-dimensional sheet thin film with high orientation and a thickness of 400-450 nm prepared by taking a two-dimensional tin oxide nano sheet thin film with high crystallinity, vertical growth and porosity as a substrate. The preparation method of the highly-oriented two-dimensional hybrid perovskite thin film mainly comprises the following steps: firstly, cleaning a conductive glass substrate and then blow-drying; putting the conductive glass substrate in an aqueous solution of SnCl2 for reaction, obtaining a SnO2 nano thin film after cleaning and blow-drying and then depositing the perovskite thin film on the SnO2 nano sheet thin film through a two-step method. The organic-inorganic hybrid perovskite thin film provided by theinvention is high in crystallinity and not only has vertical growth characteristics during crystallization under the influence of a titanium oxide substrate shape limiting region, but also has high stability.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a highly oriented two-dimensional hybrid perovskite film regulated by a substrate and a preparation method thereof. Background technique [0002] Since the first organic-inorganic hybrid perovskite solar cell was reported in 2009, the efficiency has soared from the initial 3.8% to 22.1% in 2017. The methylammonium lead iodide perovskite material has ideal band gap (about 1.5eV), low exciton binding energy (about 35-75eV), high absorption coefficient (greater than 104cm -1 ), and has a longer electron-hole diffusion length, these advantages make it very suitable for application in solar cells. For new high-efficiency solar cells, high-quality perovskite films are the key to achieving high photoelectric conversion efficiency of perovskite solar cells. The preparation of two-dimensional hybrid perovskite films with high orientation can effectively improve the elect...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K30/15Y02E10/549
Inventor 袁宁一蒋君丁建宁
Owner CHANGZHOU UNIV
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