Cathode interface modification material as well as preparation method and application thereof

A technology for modifying materials and cathode interfaces, applied in the field of solar cells, can solve the problems of complex synthesis of interface materials, few reports of non-fullerene solar cell interface materials, poor economy, etc., to optimize the morphology and device efficiency, and improve the photovoltaic Conversion efficiency and less environmental pollution

Active Publication Date: 2019-06-21
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the research on cathode interface modification materials has achieved good results, they are mainly suitable for fullerene solar cells, and interface materials that can be applied to non-fullerene solar cells are rarely reported.
At the same time, the synthesis of these interface materials is relatively complex and economical.

Method used

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  • Cathode interface modification material as well as preparation method and application thereof
  • Cathode interface modification material as well as preparation method and application thereof
  • Cathode interface modification material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Such as figure 1 As shown, in this embodiment, the preparation method steps of the cathode interface modification material PDI-N are as follows:

[0064] Under nitrogen atmosphere, compound 1a (2.35g, 6mmol), N,N-dimethyl-1,3-diaminopropane (7.55mL, 60mmol) and 100mL N-methylpyrrolidone were added to a 250mL round bottom flask. Then the temperature was raised to 95°C and refluxed for 24h. After the reaction solution was cooled to room temperature, the crude product was separated by filtration, and the filter cake was washed with 150 mL of water until the filtrate was colorless, and then washed with 150 mL of ethanol until the filtrate was colorless. The obtained residue was heated to 90° C. in 5% aqueous sodium hydroxide solution (150 mL), stirred for 30 min to remove unreacted raw materials. At room temperature, the suspension obtained by reacting with sodium hydroxide was filtered, and the filter cake was washed with 150 mL of water until the filtrate was colorless,...

Embodiment 2

[0068] Such as figure 2 As shown, in this embodiment, the preparation method of the cathode interface modification material P1P-N includes the following steps:

[0069] Step 1. Under nitrogen atmosphere, compound 2a (8.19g, 15mmol), N,N-dimethyl-1,3-diaminopropane (4.16mL, 33mmol) and 260mL isobutanol were added to a 500mL round bottom flask. Then the temperature was raised to 85°C and refluxed for 16h. After the reaction solution was cooled to room temperature, it was poured into water, and a red solid precipitated out. The red solid was isolated by filtration, the filter cake was washed with 150 mL of water until the filtrate was colorless, and then washed with 150 mL of ethanol until the filtrate was colorless. The crude product was purified by silica gel column using dichloromethane:triethylamine (50:1) as eluent to obtain compound PDIN-2Br. It is a red solid with a yield of 61%.

[0070] Characterization of PDIN-2Br by NMR: 1 H NMR (400MHz, CDCl 3 ,δ):9.50-9.48(d,J...

Embodiment 3

[0076] Such as image 3 As shown, in this embodiment, the preparation method steps of the cathode interface modification material P2P-N are as follows:

[0077] PDIN-2Br (1.99g, 2.80mmol), 4-biphenylboronic acid (1.65g, 8.32mmol), potassium carbonate (3.87g, 28.00mmol) and Pd(PPh 3 ) 4 (catalytic amount) into a Schlenk (250 mL) bottle. Under nitrogen atmosphere, toluene (70 mL), ethanol (42 mL) and water (14 mL) were added respectively. Then the temperature was raised to 100°C and refluxed for 24h. After cooling to room temperature, the reaction solution was concentrated under reduced pressure. Dilute with dichloromethane, add water, extract with dichloromethane, collect the organic phase, dry over anhydrous sodium sulfate, and evaporate under reduced pressure to obtain the crude product. Using dichloromethane: triethylamine (200:1) as the eluent, the compound P2P-N was obtained by purifying on a silica gel column. It is a purple solid with a yield of 78%.

[0078] Char...

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Abstract

The invention relates to the technical field of solar batteries and in particular relates to a cathode interface modification material as well as a preparation method and application thereof. The cathode interface modification material has a structural formula I as shown in the specification, in the formula, R1 is selected from any one of H and formulae as shown in the specification, and R2 is selected from any one of formulae as shown in the specification. The cathode interface modification material provided by the invention has high photoelectric conversion efficiency, can be applied to organic polymer solar batteries and particularly applied to non-fullerene solar batteries. According to the cathode interface modification material provided by the invention, lateral groups of which the steric hindrance is gradually increased are introduced into both sides of perylene bisimide, so that perylene bisimide molecules are further twisted, regulation and control on molecule accumulation states can be achieved, the morphology and the device efficiency of a membrane can be optimized, and the photoelectric conversion efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a cathode interface modification material, its preparation method and its application. Background technique [0002] At present, the energy consumed in the world is mainly fossil fuels, but its use will cause huge pollution to the environment. On the other hand, fossil energy is also very limited, and its depletion is inevitable. Therefore, the development of sustainable clean energy is one of the major issues facing both academia and industry in the 21st century. Solar cells, which directly convert solar energy into electricity, have become one of the most promising products for solving global energy problems. Although inorganic silicon solar cells are currently highly efficient, their widespread application is limited by the high cost and high energy consumption of their production process. Therefore, new and inexpensive organic solar cells have been extensively studied....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D471/06H01L51/42H01L51/46
CPCY02E10/549
Inventor 李振李雅琴李倩倩闵杰
Owner WUHAN UNIV
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