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Copolymer of bithiophene diazosulfide and dibenzothiophene (BDT) and application thereof

A technology of benzothiadiazole and copolymer, which is applied in the field of application, can solve the problem that the solubility of dithiophene benzothiadiazole-based polymers is not very good, and achieve a good effect of photoelectric conversion function

Inactive Publication Date: 2010-11-03
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dithiophene benzothiadiazolyl polymer still has the problem that the solubility properties are not very good.

Method used

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  • Copolymer of bithiophene diazosulfide and dibenzothiophene (BDT) and application thereof
  • Copolymer of bithiophene diazosulfide and dibenzothiophene (BDT) and application thereof
  • Copolymer of bithiophene diazosulfide and dibenzothiophene (BDT) and application thereof

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Embodiment Construction

[0045] The present invention uses the above-mentioned polymer as a working medium, and the method for preparing a polymer solar cell is: mix PBDT-DODTBT with an appropriate amount of C 60 and its derivatives or other substances that can be used as electron acceptors, add an appropriate amount of solvent to dissolve, prepare a layer of translucent film on ITO conductive glass by conventional spin coating or other methods, and then vacuum evaporated The metal electrode is vapor-deposited on the polymer to prepare a polymer solar cell device.

[0046] 5mg of PBDT-DODTBT with 10mg of C 60 Mix, add 0.25mL o-dichlorobenzene to dissolve, prepare a layer of about 70nm thick film on the conductive glass modified by PEDOT:PSS by spin coating at 2000rpm, and then use aluminum on the polymer by vacuum evaporation Prepare metal electrodes. Its device performance is as follows:

[0047] Short circuit current=8.96mA / cm 2 ; Open circuit voltage = 0.76V; Fill factor = 59%;

[0048] Simula...

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Abstract

The invention relates to a copolymer of bithiophene diazosulfide and dibenzothiophene (BDT) and application thereof. 4,7-bithiophene-5,6-dioctyloxy-diazosulfide (DODTBT) and a di-tin compound of the BDT are coupled through Stille to obtain poly-[2,6-(4',8'-di-iso-octyl-benzene-(1',2'-b;3',4'-b)-bithiophene)-CO-4,7-bithiophene-5,6-dioctyloxy-diazosulfide (PBDT-DODTBT). The polymer has good photoelectric conversion function and can be widely applied to polymer solar cells. Particularly, the PBDT-DODTBT is used as a donor material and mixed with a C60 receptor, and an obtained mixture is coated on ITO (Indium Tin Oxid) conducting glass to prepare a semitransparent thin film; and then a metal electrode is evaporated on the polymer through a vacuum evaporation mode to prepare a polymer solar cell device, wherein the preliminary survey energy conversion efficiency (PCE) of the device reaches 4.02 percent.

Description

technical field [0001] The invention relates to a copolymer material of dithiophenebenzothiadiazole and dithiophenebenzene; [0002] The invention also relates to the use of the above materials in solar cells. Background technique [0003] In recent two years, conjugated polymers containing benzodithiophene (BDT) groups as donors have shown excellent photovoltaic performance. Yang Yang et al. synthesized a series of BDT-based conjugated polymers, which have very good photoelectric properties, the highest reported PCE is 7.4%, but the stability performance is slightly lacking. 1,2,3-Benzothiadiazole is an important electron acceptor unit. In recent years, dithiophenebenzothiadiazolyl (DTBT) polymer has been widely used in electrochromic, polymer solar cells, polymer light-emitting diodes, etc. has been extensively studied [(1) Svensson M; Zhang F L; Inganas O; et al. Advanced Materials.2003, 15, (12), 988-991. (2) Yang R Q; Tian R Y; Cao Y; et al. al.Macromolecules.2005, 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/46
CPCY02E10/549
Inventor 邹应萍丁娉刘波杨苗张振华潘春跃
Owner CENT SOUTH UNIV
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