Preparation method and application of perovskite solar cell electron transport layer based on low-temperature titanium dioxide mesoporous structure

An electron transport layer and solar cell technology, which is applied in the field of solar cells, can solve the problems of limited application and high energy consumption, and achieve the effects of collection and transmission, low energy consumption, and good repeatability

Inactive Publication Date: 2019-06-07
北京宏泰创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, TiO 2 dense layer and TiO 2 The two most commonly used preparation methods for mesoporous layers are spray oxidation method and spin coating method, but the TiO prepared by these two methods

Method used

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  • Preparation method and application of perovskite solar cell electron transport layer based on low-temperature titanium dioxide mesoporous structure
  • Preparation method and application of perovskite solar cell electron transport layer based on low-temperature titanium dioxide mesoporous structure
  • Preparation method and application of perovskite solar cell electron transport layer based on low-temperature titanium dioxide mesoporous structure

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preparation example Construction

[0027] The present invention provides a method for preparing an electron transport layer of a perovskite solar cell based on a low-temperature titanium dioxide mesoporous structure. The specific steps are as follows:

[0028] 1) Preparation of TiO on conductive glass substrate 2 dense layer

[0029] Preparation of precursor TiCl 4 The alcohol solution was spin-coated on a homogenizer, and then placed on a heating table for annealing.

[0030] 2) on TiO 2 Preparation of TiO on the surface of dense layer 2 Mesoporous layer

[0031] Preparation of brookite phase TiO 2 The alcohol dispersion of the slurry is spin-coated on a homogenizer, and then placed on a heating table for annealing.

[0032] TiCl 4 Alcoholic solution and brookite phase TiO 2 In the alcohol dispersion of the slurry, the alcohol solvent can be selected from n-butanol, ethanol, and isopropanol.

[0033] Preparation of TiO on Conductive Glass Substrates 2 When dense layer, the present invention selects T...

Embodiment 1

[0044] Such as figure 1 The perovskite solar cell structure shown includes a transparent conductive layer, an electron transport layer, a perovskite absorber layer, a hole transport layer and a back electrode layer. The specific preparation method is as follows:

[0045] 1) Prepare the FTO conductive glass layer by chemical vapor deposition on the glass substrate;

[0046] 2) Prepare an electron transport layer on the FTO conductive glass substrate, wherein the electron transport layer includes TiO 2 dense layer and TiO 2 Mesoporous layer:

[0047] ① Preparation of TiO on FTO conductive glass substrate 2 dense layer

[0048] 17% TiCl 4 The original solution was dissolved in n-butanol and configured as TiCl with a concentration of 0.18mol / L 4 - Isopropanol solution. The cleaned FTO conductive glass is placed on the homogenizer, and the TiCl 4 -N-butanol solution is uniformly spin-coated on the surface of FTO glass, the spin-coating time is 30s, and then the 2 The dense...

Embodiment 2

[0055] Such as figure 1 The perovskite solar cell structure shown includes a transparent conductive layer, an electron transport layer, a perovskite absorber layer, a hole transport layer and a back electrode layer in sequence. The specific preparation method is as follows:

[0056] Except step 2), other steps are identical with embodiment 1;

[0057] 2) Prepare an electron transport layer on the FTO conductive glass substrate, wherein the electron transport layer includes TiO 2 dense layer and TiO 2 Mesoporous layer:

[0058] ① Preparation of TiO on FTO conductive glass substrate 2 dense layer

[0059] 17% TiCl 4 The original solution was dissolved in n-butanol and configured as TiCl with a concentration of 0.2mol / L 4 - Solution in n-butanol. The cleaned FTO conductive glass is placed on the homogenizer, and the TiCl 4 -N-butanol solution is uniformly spin-coated on the surface of FTO glass, the spin-coating time is 30s, and then the 2 The dense layer of FTO glass is...

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Abstract

The invention provides a preparation method of a perovskite solar cell electron transport layer based on a low-temperature titanium dioxide mesoporous structure. The electron transport layer comprisesa TiO2 compact layer and a TiO2 mesoporous layer, and the preparation method comprises the following steps: firstly, preparing the TiO2 compact layer on a conductive glass substrate: preparing alcoholic solution of a precursor TiCl4, carrying out spin coating, and performing annealing at the temperature of 150 DEG C; secondly, preparing the TiO2 mesoporous layer on the TiO2 compact layer: preparing alcohol dispersion liquid of brookite phase TiO2 slurry, carrying out the spin-coating, and carrying out the annealing at the temperature of 150 DEG C. The method overcomes the application limitation of high-temperature annealing in the preparation of the TiO2-based electron transport layer in the prior art, achieves the preparation of the TiO2-based electron transport layer under a low-temperature condition, and achieves the preparation by adopting a spin coating method, and the process steps are simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a preparation method and application of an electron transport layer of a perovskite solar cell based on a low-temperature titanium dioxide mesoporous structure. Background technique [0002] In recent years, perovskite solar cells have become a research hotspot in the field of photovoltaic cells due to their excellent performance, low cost, and huge commercial value. In just a few years, the photoelectric efficiency of perovskite solar cells has rapidly increased from 3.8% to 23.7%, and the development trend is rapid. According to the structure of the selected electron transport layer, perovskite solar cells can be divided into planar and mesoporous cells, and mesoporous cells have higher conversion efficiency and smaller current hysteresis. The structure of perovskite solar cells with mesoporous structure generally includes a transparent conductive layer, a hole blocking la...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/46H01L51/42B82Y40/00
CPCY02E10/549
Inventor 张洪旭王永磊唐泽国
Owner 北京宏泰创新科技有限公司
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