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A perovskite solar cell using a perovskite composite material as a hole transport layer and its preparation method

A hole transport layer, perovskite-type technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of complex synthesis process, unfavorable commercial development of perovskite solar cells, and performance-price ratio gap. The effect of improving electrical conductivity, improving photoelectric conversion efficiency, and good electrical conductivity

Inactive Publication Date: 2018-11-27
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although spiro-OMeTAD can achieve high photoelectric conversion efficiency as the hole transport layer of perovskite solar cells, due to its complex synthesis process, the price is several times that of gold, which is not conducive to the commercial development of perovskite solar cells.
Researchers are constantly looking for other cheap and efficient hole transport materials to replace spiro-OMeTAD. The current research direction is to design and prepare triphenylamine materials similar to spiro-OMeTAD structure and cheap CuI inorganic semiconductor materials, but the performance and price of these materials There is a big gap between the ratio and the industrial application target, and it is necessary to design and screen a new hole transport layer material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 220g (3.0mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 88.6g (0.10mol) of an acetic acid solution of lead tetraacetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 8 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce lead tetraacetate to It is low-valence lead acetate. Then add 77.4 g (0.3 mol) of hydriodic acid solution with a concentration of 50% by mass and continue stirring for 1 hour to reduce excess lead tetraacetate to form a hydriodic acid-doped polypyrrole and lead iodide solution. Further add 10.3 g (0.1 mol) of a methanol solution of methylamine with a mass percent concentration of 30%, and react at 10-30°C for 8 hours to coordinate lead iodide with methylamine and polypyrrole in the presence of hydroiodic acid reaction to form a hole transport layer coating s...

Embodiment 2

[0028] Add 220g (3mol) of dimethylformamide, 36g (0.3mol) of acetic acid and 6.7g (0.05mol) of pyrrole to a glass reactor to form an acidic solution of pyrrole, cool it to -5-5°C, and stir Slowly add 28.7g (0.15mol) of an acetic acid solution of iron acetate with a concentration of 50% by mass, and carry out an oxidation reaction at 0-5°C for 12 hours to oxidize and polymerize pyrrole to form polypyrrole, and reduce iron acetate to low-priced state of iron acetate. Add 103.2 g (0.4 mol) of hydriodic acid solution with a mass percent concentration of 50% and continue stirring for 1 hour to reduce excess iron acetate to form a hydriodic acid-doped polypyrrole and ferrous iodide solution. Further add 15.5 g (0.15 mol) of methanol solution of methylamine with a concentration of 30% by mass, and react at 10-30°C for 12 hours to make ferrous iodide, methylamine and polypyrrole complex in the presence of hydroiodic acid bit reaction to form a hole transport layer coating solution. ...

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Abstract

The perovskite solar cell of the present invention is composed of a transparent conductive glass, a dense layer, a perovskite light absorbing layer, a hole transport layer, and a metal back electrode, and is characterized in that the chemical composition of the hole transport layer is PxA1-xMX3, wherein A represents Methylamine, formamidine, guanidine or their mixtures that can generate monovalent organic cations; M represents Pb, Ce, Fe, Co, Cu ions or their mixtures, which are by-products formed during the in-situ preparation of polypyrrole; X represents F, Cl, Br, I; P stands for polypyrrole, which is produced by oxidation of pyrrole as a high-valent metal salt in a polar organic solvent, x=0.3‑0.5. The chemical composition of the perovskite light-absorbing layer in the perovskite solar cell of the present invention is APbX3, and the thickness is 100-500 nm. The hole transport layer of the perovskite solar cell of the present invention is coated on the perovskite light absorbing layer with a thickness of 50-150nm, which can promote the separation and transmission of holes and improve the photoelectric conversion performance of the perovskite solar cell.

Description

technical field [0001] The invention relates to a perovskite solar cell using a perovskite type material and a polypyrrole conductive polymer material as a hole transport layer and a preparation method thereof, belonging to the field of new energy and new materials. technical background [0002] Perovskite solar cells are usually composed of five parts: transparent conductive glass, dense layer, perovskite light absorbing layer, hole transport layer, and metal back electrode. The thickness of the hole transport layer is generally 0-150nm. The photoelectric conversion efficiency of perovskite solar cells without a hole transport layer is usually relatively low. The functions of the hole transport layer include: (1) collecting light from the perovskite absorbing layer The injected holes separate the electron-hole pairs of the perovskite light-absorbing layer; (2) The insertion of the hole transport layer between the perovskite light-absorbing layer and the metal back electrode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K85/331H10K30/151Y02E10/549
Inventor 刘炳光李建生佟玉洁王少杰卢俊锋
Owner TIANJIN VOCATIONAL INST
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