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Narrow-energy-gap organic solar cell material and preparation method thereof

A solar cell and narrow bandgap technology, applied in organic chemistry, circuits, photovoltaic power generation, etc., can solve the problems of limiting the photoelectric conversion efficiency of solar cell devices, narrow spectral absorption range, etc., and achieve broadened spectral response range and wide solar spectral response range , The effect of improving the carrier transport characteristics

Inactive Publication Date: 2014-06-25
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, P3HT also has obvious shortcomings, such as a relatively narrow spectral absorption range, which is limited to the absorption of sunlight within 650nm, which greatly limits the further improvement of the photoelectric conversion efficiency of solar cell devices.

Method used

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  • Narrow-energy-gap organic solar cell material and preparation method thereof
  • Narrow-energy-gap organic solar cell material and preparation method thereof
  • Narrow-energy-gap organic solar cell material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]

[0022] Target compound P1

[0023] According to the reaction scheme, compound 1 and liquid bromine were mixed in hydrobromic acid solvent and reacted at 110°C to obtain compound 2. Compound 3 was dissolved in freshly distilled tetrahydrofuran solvent, reacted with butyllithium at -78°C, and then bromohexane was added to obtain compound 4. 4 was dissolved in freshly distilled tetrahydrofuran solvent, reacted with n-butyllithium at -78°C, and isopropanol pinacol borate was added to give 5. Combine 5 and 2 at 2mol / mL K 2 CO 3 Mix in solution and toluene solvent, in tetrakistriphenylphosphine palladium (Pd(PPh 3 ) 4 ) as a catalyst, the Suzuki coupling reaction occurred to obtain the target compound P1.

[0024] 【Reaction Roadmap】

[0025]

Embodiment 2

[0027]

[0028] Target compound P2

[0029] According to the reaction scheme, compound 1 and liquid bromine were mixed in hydrobromic acid solvent and reacted at 110°C to obtain compound 2. Compound 3 was dissolved in freshly distilled tetrahydrofuran solvent, reacted with butyllithium at -78°C, and then brominated n-octane was added to obtain compound 4. 4 was dissolved in freshly distilled tetrahydrofuran solvent, reacted with n-butyllithium at -78°C, and isopropanol pinacol borate was added to give 5. Combine 5 and 2 at 2mol / mL K 2 CO 3 Mix in solution and toluene solvent, in tetrakistriphenylphosphine palladium (Pd(PPh 3 ) 4 ) as a catalyst, the Suzuki coupling reaction occurred to obtain the target compound P2.

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Abstract

The invention relates to a narrow-energy-gap organic solar cell material and a preparation method thereof, particularly a novel narrow-energy-gap organic solar cell material based on thiophene-diazosulfide p-n structure and a preparation method thereof. The quantities and contents of the p-type electron donating primitive thiophene and n-type electron receiving primitive diazosulfide are regulated to precisely regulate the band gap of the target material, and the alkyl chain is modified to implement solubility in a polar solvent and application in the field of organic photoelectricity. The structure is disclosed as Formula I. According to the material provided by the invention, Suzuki reaction is utilized to synthesize the monomer, and the material is simple in synthesis technique, easy for mass production and easy to purify. The material has favorable spectrum heat stability, amorphous film-forming stability and narrow optical energy gap, can absorb sunlight within a wider wave spectrum range, and can be used in organic solar cell devices as an active material.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials and preparation, and specifically relates to an organic solar photoelectric conversion material, more specifically a novel narrow-bandgap organic solar cell material based on a thiophene-benzothiadiazole p-n structure and a preparation method thereof. The material precisely adjusts the band gap of the target material by adjusting the quantity and content of the p-type electron-donating element thiophene and the n-type electron-accepting element benzothiadiazole, and modifies the polar functional group on its alkyl chain. Applied to organic optoelectronic devices, especially organic solar cell devices. Background technique [0002] Organic Photo Voltage (OPV) is one of the hot frontiers of current scientific research. This type of device has the advantages of high flexibility, low manufacturing cost, and large-area uniform film. New energy sources in transportation, lighting and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D417/14H01L51/46
CPCC07D417/14H10K85/6576H10K85/657Y02E10/549
Inventor 张广维方旭赖文勇黄维范曲立王龙
Owner NANJING UNIV OF POSTS & TELECOMM
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