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A kind of in situ preparation method of perovskite solar cell photoanode

A solar cell, in-situ preparation technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of insufficient sunlight absorption and utilization, long electron diffusion length, large perovskite particles, etc., to improve the utilization of sunlight The rate, the method is simple and effective, and the effect of filling is complete.

Inactive Publication Date: 2016-02-10
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-step or two-step solution method has higher requirements on the pores of the titanium dioxide layer, and the prepared perovskite particles are larger, not easy to control, the formed film is uneven, the filling is insufficient, and the local accumulation is serious; the perovskite prepared by the vapor deposition method Mineral light-absorbing materials are mainly deposited on the surface of the titanium dioxide layer and fail to fully penetrate into the interior of the titanium dioxide layer, resulting in the need for a longer electron diffusion length for the perovskite light-absorbing material, or the need to prepare a titanium dioxide layer lower than the electron diffusion length of the perovskite light-absorbing material. It can make full use of the high specific surface area of ​​nano-titanium dioxide, resulting in insufficient absorption of sunlight, and requires more advanced vapor deposition equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The in-situ preparation method of the photoanode of the perovskite solar cell of the present invention is realized through the following steps:

[0021] In the first step, tetra-n-butyl titanate was dissolved in isopropanol to prepare a concentration of 0.1 mmol L -1 Titanium dioxide dense layer solution; cut the conductive substrate into a size of 2.0cm × 1.5cm, wash it three times with distilled water, and then wash it with acetone three times; spin coat the titanium dioxide dense layer solution on the conductive substrate, and first spin coat it at 500 rpm for 10 second, spin coating at 6000 rpm for 30 seconds, and then placed in a muffle furnace for sintering at 400°C for 0.5 hour, and cooled to room temperature to obtain an electrode containing a dense layer of titanium dioxide.

[0022] In the second step, take 20mL tetra-n-butyl titanate and add it to 300mL deionized water. After stirring for 0.5 hours, the white precipitate obtained is filtered and washed three ...

Embodiment 2

[0027] The in-situ preparation method of the photoanode of the perovskite solar cell of the present invention is realized through the following steps:

[0028] The first step is the same as the first step in Example 1.

[0029]The second step is to prepare titanium dioxide slurry with the method for preparing titanium dioxide slurry in the second step in Example 1; add lead bromide to the titanium dioxide slurry and stir evenly to obtain a mixed slurry of titanium dioxide and lead bromide, wherein titanium and lead The atomic number ratio of the titanium dioxide is 2:1; the electrode containing the dense layer of titanium dioxide is placed on a clean and flat table, covered with scotch tape around it, and the reserved space is 1.0cm×0.5cm, and the titanium dioxide and lead bromide The mixed slurry was uniformly scraped on the electrode with a glass slide, and after drying at room temperature, it was placed in a muffle furnace for sintering at 400°C for 0.5 hours, and cooled to...

Embodiment 3

[0034] The in-situ preparation method of the photoanode of the perovskite solar cell of the present invention is realized through the following steps:

[0035] In the first step, titanium isopropoxide was dissolved in isopropanol to prepare a concentration of 0.1 mmol L -1 Titanium dioxide dense layer solution; cut the conductive substrate into a size of 2.0cm × 1.5cm, wash it three times with distilled water, and then wash it with acetone three times; spin coat the titanium dioxide dense layer solution on the conductive substrate, and first spin coat it at 500 rpm for 10 second, spin coating at 6000 rpm for 30 seconds, and then placed in a muffle furnace for sintering at 400°C for 0.5 hour, and cooled to room temperature to obtain an electrode containing a dense layer of titanium dioxide.

[0036] In the second step, prepare the titanium dioxide slurry with the method for preparing the titanium dioxide slurry in the second step in Example 1; add lead chloride to the titanium ...

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Abstract

The invention discloses an in-situ preparation method of a photoanode of a perovskite solar cell. A lead-containing compound is uniformly dispersed in a titanium dioxide slurry, and a film is formed on a conductive base material by a scraping coating method or a spin coating method, and titanium dioxide is obtained by high-temperature sintering. Composite film with lead oxide; after treatment with hydrohalic acid solution, a composite film of titanium dioxide and lead halide is obtained in situ; a layer of lead halide is spin-coated on its surface; after treatment with organic halide amine solution, organic lead halide calcium titanium is obtained in situ A composite photoanode with good contact between mineral light-absorbing material and titanium dioxide, uniform filling and covering. The photoanode of the invention can meet the application requirements of high-efficiency and low-cost perovskite solar cells, and has the characteristics of mild and controllable preparation conditions, simple and effective preparation method, low cost, and favorable for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a photoanode of a perovskite solar cell, in particular to an in-situ preparation method for a photoanode of a perovskite solar cell. Background technique [0002] Perovskite solar cell is a new type of photoelectric conversion device, which has the advantages of high efficiency, low cost, good stability, etc. Competitiveness, has a wide range of application prospects. The battery uses titanium dioxide with good thermal and photochemical stability as the base semiconductor material, and prepares a layer of perovskite light-absorbing material on its surface to absorb visible light, and uses solid-state hole-transporting materials for electron-hole transport. Finally, a metal (such as gold or silver) is plated as the back contact metal electrode to form a solar cell with a "sandwich" structure. The key to high-efficiency perovskite solar cells lies in the preparation of photoanodes. [0003] The existing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCH10K30/151H10K30/81Y02E10/549Y02P70/50
Inventor 肖尧明韩高义
Owner SHANXI UNIV
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