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Benzodifuran-based polymer materials and their photovoltaic application

A polybenzodifuran, polymer technology, used in photovoltaic power generation, electrical components, circuits, etc.

Inactive Publication Date: 2012-12-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Benzo[1,2-b;3,4-b]difuran (BDF) is an important electron-donor unit, but it is used as a donor unit after polymerization with other fused heterocyclic acceptor units in organic electronics. There are few reports in the field

Method used

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  • Benzodifuran-based polymer materials and their photovoltaic application
  • Benzodifuran-based polymer materials and their photovoltaic application
  • Benzodifuran-based polymer materials and their photovoltaic application

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Embodiment 1

[0029] Embodiment 1: the preparation of polymer solar cell

[0030] 5mg of PBDFDODTBT with 10mg of C 70 Mix, add 0.25mL o-dichlorobenzene to dissolve, prepare a layer of about 80nm thick film on the conductive glass modified by PEDOT:PSS by spin coating, and then use aluminum to prepare on the polymer by vacuum evaporation metal electrodes. Its device performance is as follows:

[0031] Short circuit current=9.87mA / cm 2 ; Open circuit voltage = 0.69V; Fill factor = 65%;

[0032] Simulated sunlight (A.M.1.5, 100mW / cm 2 ) under the energy conversion efficiency = 4.5%.

Embodiment 2

[0033] Embodiment 2: replace PBDFDODTBT with PBDFDTBTz and PBDFDTBO as the working medium, and the remaining conditions are the same as in Embodiment 1.

[0034] A series of polybenzodifuran materials provided by the invention have good processability, and have been proved to have good photoelectric conversion characteristics through preliminary attempts, and have broad application prospects as the working medium of polymer solar cells.

[0035] The preparation method of a series of polybenzodifuran derivative materials provided by the present invention is to directly polymerize BDF units with another aromatic heterocycle or their derivatives by using a Stille coupling method.

[0036] Specifically, the preparation method of material of the present invention, its main steps are:

[0037] 1) Mix benzodifuran-4,8-dione (1.88g, 10mmol), NaOH (6.0g, 150mmol) and zinc powder (1.43g, 22mmol) in 33mL water, stir and reflux for 1 hour, add Isooctane bromide (1.74g, 9mmol) and tetrabu...

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Abstract

A series of derivative materials with the main chain containing benzodifuran (BDF) units are prepared, and a BDF polymer derivative material is obtained through connecting the BDF units with another aromatic ring, an aromatic heterocyclic ring or their derivatives by C-C single bonds via a Stille coupling polymerization method. The series of polymers have a good photoelectric conversion function when they are applied to solar batteries. A concrete application process comprises the following steps: mixing the polymer material with a C60 or C70 acceptor, coating on ITO conductive glass to prepare a semi-transparent film, and vapor-plating a metal electrode on the polymer in a vacuum vapor plating manner, and preparing a polymer solar battery device.

Description

technical field [0001] The invention relates to a series of polybenzodifuran materials, in particular to a series of polybenzodifuran derivative photovoltaic materials connected by carbon-carbon single bonds. [0002] The invention also relates to the use of the above materials in solar cells. Background technique [0003] Benzo[1,2-b;3,4-b]difuran (BDF) is an important electron-donor unit, but it is used as a donor unit after polymerization with other fused heterocyclic acceptor units in organic electronics. There are few reports in the field. Benzo[1,2-b;3,4-b]dithiophene (BDT) was used as an electron-donor unit in polymer solar cells, and an energy conversion efficiency as high as 8% was obtained. [Zhicai He, Chengmei Zhong, Xun Huang, Wai-Yeung Wong, Hongbin Wu, Liwei Chen, Shij ian Su, and Yong Cao. Advanced materials, 2011, 23, 4636-4643.]. In fact, benzo[1,2-b;3,4-b]difuran is chemically similar to benzo[1,2-b;3,4-b]dithiophene (BDT), and BDF has a higher The bett...

Claims

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Application Information

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IPC IPC(8): C08G61/12C08L65/00H01L51/46
CPCY02E10/549
Inventor 邹应萍刘波陈学文唐万军肖璐
Owner CENT SOUTH UNIV
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