Application of multiple fused ring conjugated macromolecules in perovskite solar cells

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of complex and tedious purification process, poor device stability, difficult energy level regulation, etc., to achieve strong light absorption, stability improvement, Hysteresis improvement effect

Active Publication Date: 2021-03-19
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fullerene derivatives also have many disadvantages, such as difficulty in energy level regulation, poor device stability due to easy aggregation, and high preparation costs due to complicated and tedious purification processes.

Method used

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  • Application of multiple fused ring conjugated macromolecules in perovskite solar cells
  • Application of multiple fused ring conjugated macromolecules in perovskite solar cells
  • Application of multiple fused ring conjugated macromolecules in perovskite solar cells

Examples

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preparation example Construction

[0074] The preparation method of the above-mentioned multi-fused ring conjugated macromolecules preferably includes: in the presence of a basic compound and in an organic solvent, dehydration condensation of the compound represented by the following formula (2) and the compound represented by the formula (a) Reaction, obtains the compound shown in formula (1); Wherein,

[0075]

[0076] Formula (a) is selected from one or more of the following compounds:

[0077]

[0078] In this method, the groups A-B, R 1 -R 14 As described above, the present invention will not be repeated here.

[0079] Wherein, the compound shown in formula (2) can be selected according to the structure of the poly-fused ring conjugated macromolecule above, preferably, the compound shown in formula (2) is one or more of the following formulas:

[0080]

[0081] Specific examples of compounds represented by formula (2) can be, for example, one or more of the following formulae:

[0082] Formula...

preparation example 1

[0150] This preparation example is used to illustrate the preparation method of the compound represented by formula (2-5-1).

[0151]

[0152] As shown in the above reaction formula, the compound represented by formula ID (131mg, 0.2mmol; purchased from Suzhou Nakai Technology Co., Ltd.), tetrahydrofuran (20mL) was added to the reaction vessel, argon was blown, and stirred at -78°C for 1h . Slowly add n-butyl lithium (0.38mL, 0.6mmol, 1.6M) dropwise, stir at -78°C for 2h, add N,N-dimethylformamide (36.6mg, 0.5mmol), and slowly return the reaction product to At room temperature (about 25°C), stir overnight (about 12h). Then add water (0.2mL) to quench, use saturated brine and dichloromethane to extract, use magnesium sulfate to dry, spin dry, the precipitate that obtains uses silica gel chromatographic column (using 200-300 purpose silica gel, eluent is volume ratio (2:1 petroleum ether / dichloromethane) for chromatographic separation to obtain a bright yellow solid (91 mg,...

preparation example 2

[0154] This preparation example is used to illustrate the preparation method of the compound represented by formula (2-9-2).

[0155]

[0156] As shown in the above reaction formula, the compound represented by the formula IBT (226mg, 0.2mmol; purchased from Suzhou Nakai Technology Co., Ltd.), tetrahydrofuran (35mL) was added to the reaction vessel, argon was blown, and stirred at -78°C for 1h . Slowly add n-butyllithium (0.4mL, 0.64mmol, 1.6M) dropwise, stir at -78°C for 1.5h, add N,N-dimethylformamide (65.8mg, 0.9mmol), and slowly return the reaction product to to room temperature (about 25°C), and stirred overnight (about 12h). Then add water (0.4mL) to quench, use saturated brine and dichloromethane to extract, use magnesium sulfate to dry, spin dry, the precipitate that obtains uses silica gel chromatographic column (using 200-300 purpose silica gel, eluent is volume ratio (1:1 petroleum ether / dichloromethane) for chromatographic separation to obtain an orange-red so...

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Abstract

The invention relates to the field of perovskite solar cells, in particular to the application of multi-condensed ring conjugated macromolecules in perovskite solar cells. The photovoltaic material of the perovskite solar cell contains polyfused ring conjugated macromolecules, and the polyfused ring conjugated macromolecules are compounds represented by the following formula (1). The present invention applies multi-condensed ring conjugated macromolecules to perovskite solar cells, which can obtain strong light absorption, high charge transport performance and suitable electron energy level, thereby obtaining photoelectric conversion efficiency, stability and Perovskite solar cells with improved hysteresis.

Description

technical field [0001] The invention relates to the field of perovskite solar cells, in particular to the application of multi-condensed ring conjugated macromolecules in perovskite solar cells. Background technique [0002] In recent years, perovskite solar cells have shown great potential application prospects due to the advantages of simple preparation process, low price, high photoelectric conversion efficiency, and flexible devices, which have attracted the attention of academia and industry. [0003] At present, the electron transport layer in n-i-p type perovskite solar cells is mainly inorganic oxides such as titanium dioxide. These inorganic oxides often require high sintering temperature, and the preparation process is complicated, which is not conducive to the preparation of flexible devices. Moreover, titanium dioxide is prone to form oxygen vacancies under ultraviolet radiation, which is not conducive to device stability. Therefore, it is very important to find...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46
CPCH10K85/6576H10K30/10Y02E10/549
Inventor 占肖卫李腾飞张明煜刘宽代水星赵冠超李立伟郭铁孟原
Owner PEKING UNIV
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