Chin. J. Org. Chem. ›› 2013, Vol. 33 ›› Issue (07): 1522-1526.DOI: 10.6023/cjoc201212017 Previous Articles     Next Articles



邹文武a, 刘颖b, 贾庆明a, 葛子义b   

  1. a 昆明理工大学化学工程学院 昆明 650500;
    b 中国科学院宁波材料技术与工程研究所 宁波 315201
  • 收稿日期:2012-12-12 修回日期:2013-02-23 发布日期:2013-03-01
  • 通讯作者: 贾庆明, 葛子义
  • 基金资助:

    国际自然科学基金(No. 21074144)资助项目.

Synthesis of New Donor-Acceptor Copolymer and Its Application in Organic Bulk Hetero-junction Solar Cells

Zou Wenwua, Liu Yingb, Jia Qingminga, Ge Ziyib   

  1. a Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming Yunnan Province, Kunming 650500;
    b Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201
  • Received:2012-12-12 Revised:2013-02-23 Published:2013-03-01
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21074144).

Alternative copolymer (PBDTDT) was synthesized from acceptor unit with strong electro-withdrawing structure of dibutyl malonate in branch chain and donor unit based on benzo[1,2-b:4,5-b']dithiophene. And its thermal, optical, electrochemical properties and photovoltaic properties blending with[6,6]-phenyl-C71 butyric acid methyl ester as the active layer in the bulk hetero-junction devices of organic solar cells were investigated. The influence of different ratio of polymer PBDTDT and PC71BM on the photovoltaic properties was also studied. And the open voltage reached 0.82 V, when the weight ratio of PBDTDT and PC71BM is 1:3, and its power conversion efficiency (PCE) was 0.90%, with Voc of 0.82 V, Jsc of 3.25 mA/cm2 and FF of 33.8%. Comparing with the poly(3-hexylthiophene) (P3HT) in the same method, the solar cells with P3HT blending with PC71BM as the active layer can only get 0.55 V, which can be lower about 0.29 V than that of the PBDTDT. And the possible factors resulting in low PCE and the higher open voltage than that of P3HT were analyzed.

Key words: dibutyl malonate, alternative copolymer, organic solar cells