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A hole transport material and preparation method thereof, and perovskite solar cell

A hole-transporting material and reaction technology, applied in the field of solar cells, can solve the problems of single types, etc., and achieve the effects of improved stability, low price, and easy scale preparation

Active Publication Date: 2020-10-30
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the above hole transport materials are all doped phthalocyanine-based hole transport materials, with a single type

Method used

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  • A hole transport material and preparation method thereof, and perovskite solar cell
  • A hole transport material and preparation method thereof, and perovskite solar cell
  • A hole transport material and preparation method thereof, and perovskite solar cell

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preparation example Construction

[0038] The present invention provides a method for preparing the hole transport material described in the above technical solution, comprising the following steps:

[0039] Mixing 4-methylphthalonitrile solution and boron trichloride solution to carry out the first reaction to obtain hexamethylboron subphthalocyanine;

[0040] The hexamethylboron subphthalocyanine, 4-alkylphthalonitrile, metal salt compound and 1,8-diazabicycloundec-7-ene are mixed for a second reaction to obtain empty Cave transport material;

[0041] The number of carbon atoms in the alkyl group in the 4-alkylphthalonitrile is 2-16.

[0042] The present invention mixes 4-methylphthalonitrile solution and boron trichloride solution to carry out the first reaction to obtain hexamethylboron subphthalocyanine. In the present invention, the solvents of the 4-methylphthalonitrile solution and the boron trichloride solution preferably independently include dichloromethane, dichlorobenzene, chlorobenzene, toluene,...

Embodiment 1

[0056] 1) Preparation of hole transport materials

[0057] Dissolve 0.92g (5mmol) of 4-methylphthalonitrile in 10mL of dichlorobenzene, pump nitrogen three times, and extract 10mL of boron trichloride solution (solvent is dichloromethane, concentration 1mol / L) with a syringe, Mix and stir with 4-methylphthalonitrile solution for 10 minutes, heat the obtained system with an electric heat gun at 100°C, and after dichloromethane is completely evaporated, raise the temperature of the electric heat gun to 500°C to boil and reflux dichlorobenzene for 5 minutes until Stop heating after the solution turns dark purple completely; After the gained system is cooled to room temperature, add 100mL sherwood oil to filter, spin-dry solvent; Gained crude product is separated by column chromatography (eluent: sherwood oil and ethyl acetate volume ratio are 3:1), to obtain hexamethylboron subphthalocyanine (0.13g, yield 15%); 1 H NMR (CDCl 3 , 400MHz) δ7.46-7.35 (m, 6H, phenyl’H), 2.33-2.17 (...

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Abstract

The invention belongs to the technical field of solar cells, and in particular relates to a hole transport material, a preparation method thereof, and a perovskite solar cell. The hole transport material of the present invention introduces 6 methyl groups and a long-chain alkane into the phthalocyanine ring, which can induce phthalocyanine molecules to form a film and form a flat-lying surface-to-surface molecular configuration on the perovskite layer, improving the phthalocyanine The hole mobility of the cyanine molecular thin film in the solar device increases the organic solubility of the phthalocyanine material, and realizes the preparation of the device in an all-liquid phase process, and the hole transport material has excellent hydrophobic properties, which can better protect the perovskite The light-absorbing layer avoids decomposition under the influence of water and oxygen, thereby improving the lifespan of the perovskite solar cell device; the hole transport material is used for the n-i-p perovskite solar cell device, and the photoelectric conversion efficiency of the device can be increased. It reaches 17.27%, and the device can maintain more than 90% of the initial photoelectric conversion efficiency after 1300 hours of operation, and the device has high stability.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a hole transport material, a preparation method thereof, and a perovskite solar cell. Background technique [0002] In 2009, the Miyasaka research group used CH for the first time 3 NH 3 PB 3 The perovskite material has prepared a sensitized structure solar cell, and obtained a photoelectric conversion efficiency of 3.8% (A.Kojima, K.Teshima, Y.Shirai, T.Miyasaka.Journal of the American Chemical Society.2009,131,6050 ). So far, the highest photoelectric conversion efficiency of perovskite solar cells has reached 23.7%. Compared with traditional solar cells, perovskite solar cells have the advantages of simple preparation process, low energy consumption, and low cost, and are expected to replace traditional solar cells. [0003] Hole transport materials are used as the transport channels for hole carriers in perovskite solar cell devices. Through material design, the semi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/22H01L51/42H01L51/46
CPCC07D487/22H10K85/311H10K85/381H10K30/15Y02E10/549
Inventor 许宗祥
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA