Hole transporting material and preparation method thereof and perovskite solar cell
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A hole transport material and reaction technology, applied in the field of solar cells, can solve problems such as single type, and achieve the effects of improving stability, high stability, and easy large-scale preparation
Active Publication Date: 2019-08-02
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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[0005] In summary, the above hole transport materials are all doped phthalocyanine-based hole transport materials, with a single type
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[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 particularly relates to a hole transporting material and preparation method of the hole transporting material and a perovskite solar cell. According to the invention, the hole transporting material introduces 6 methyls and a long-chain alkane on a phthalocyanine ring, thereby being capable of inducing phthalocyanine molecules to forma flat surface-surface stacking molecular configuration on a perovskite layer after film forming so as to enhance the hole mobility of a phthalocyanine molecular film in a solar device and increase the organic solubility of phthalocyanine materials, and then the whole liquid-phase process preparation of the device is realized. Furthermore, the hole transporting material has excellent hydrophobicity, thereby being capable of better protecting a perovskite light absorbing layer to be prevented from being decomposed by the influence of water and oxygen, thereby prolonging the service life of a perovskite solar cell device; the hole transporting material is used for the n-i-p perovskite solar cell device, so that the photoelectric conversion efficiency of the device can reach 17.27%, and thedevice further can maintain more than 90% of the initial photoelectric conversion efficiency after the device is operated for 1300h and is high in 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...
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