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高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (5): 865-872.doi: 10.1007/s40242-015-5184-1

• Articles • 上一篇    下一篇

Impact of Alkoxyl Tail of Fullerene Dyad Acceptor on Crystalline Microstructure for Efficient External Treatment-free Polymer Solar Cells with Poly(3-hexylthiophene) as Donor

XUE Rongming1, ZHAO Yue1, XU Guiying1, LI Yaowen1,2, LI Yongfang1,3   

  1. 1. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China;
    2. Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China;
    3. Beijing National Laboratory for Molecular Sciences, Institution of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • 收稿日期:2015-05-08 修回日期:2015-06-23 出版日期:2015-10-01 发布日期:2015-07-06
  • 通讯作者: LI Yaowen, E-mail: ywli@suda.edu.cn E-mail:ywli@suda.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.21204057, 91333204), the Natural Science Foundation of Jiangsu Province, China(No.BK2012213), the Priority Academic Development Program of Jiangsu Higher Education Institutions, China and the Soochow University Undergraduate Training Program for Innovation and Entrepreneurship, China(No.2013XjOZO).

Impact of Alkoxyl Tail of Fullerene Dyad Acceptor on Crystalline Microstructure for Efficient External Treatment-free Polymer Solar Cells with Poly(3-hexylthiophene) as Donor

XUE Rongming1, ZHAO Yue1, XU Guiying1, LI Yaowen1,2, LI Yongfang1,3   

  1. 1. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China;
    2. Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China;
    3. Beijing National Laboratory for Molecular Sciences, Institution of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2015-05-08 Revised:2015-06-23 Online:2015-10-01 Published:2015-07-06
  • Contact: LI Yaowen, E-mail: ywli@suda.edu.cn E-mail:ywli@suda.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21204057, 91333204), the Natural Science Foundation of Jiangsu Province, China(No.BK2012213), the Priority Academic Development Program of Jiangsu Higher Education Institutions, China and the Soochow University Undergraduate Training Program for Innovation and Entrepreneurship, China(No.2013XjOZO).

摘要:

A series of tri(alkoxyl)benzene-fullerene dyads(PCBB-Cn, n=4, 6, 8, 10, 12) with varied tri(alkoxyl) chain lengths was designed, synthesized and used as acceptor materials in polymer solar cells(PSCs). The five fullerene dyads possess similar absorption spectra in dilute solution, decreased glass-transition temperature(Tg) and gradually elevated lowest unoccupied molecular orbital(LUMO) energy levels from -3.87 eV to -3.73 eV with the increase of the alkoxy chain length. In the fabrication of PSCs with poly(3-hexylthiophene)(P3HT) as donor and the fullerene dyads as acceptor, PCBB-Cn with longer tri(alkoxyl) chains and lower Tg can induce crystalline structure of P3HT during spin-coating the photoactive layer at room temperature and form nanoscale phase separated interpenetrating network of P3HT:PCBB-Cn blend films, which results in the improvement of photovoltaic performance of PSCs. A power conversion efficiency of 3.03% for the PSCs based on P3HT:PCBB-C10 was obtained without thermal annealing or solvent annealing. The thermal and solvent annealing-free fabrication using the fullerene dyads as acceptor is very important for the roll to roll production of PSCs with flexible large area.

关键词: Polymer solar cell, Induced crystalline, Fullerene dyad

Abstract:

A series of tri(alkoxyl)benzene-fullerene dyads(PCBB-Cn, n=4, 6, 8, 10, 12) with varied tri(alkoxyl) chain lengths was designed, synthesized and used as acceptor materials in polymer solar cells(PSCs). The five fullerene dyads possess similar absorption spectra in dilute solution, decreased glass-transition temperature(Tg) and gradually elevated lowest unoccupied molecular orbital(LUMO) energy levels from -3.87 eV to -3.73 eV with the increase of the alkoxy chain length. In the fabrication of PSCs with poly(3-hexylthiophene)(P3HT) as donor and the fullerene dyads as acceptor, PCBB-Cn with longer tri(alkoxyl) chains and lower Tg can induce crystalline structure of P3HT during spin-coating the photoactive layer at room temperature and form nanoscale phase separated interpenetrating network of P3HT:PCBB-Cn blend films, which results in the improvement of photovoltaic performance of PSCs. A power conversion efficiency of 3.03% for the PSCs based on P3HT:PCBB-C10 was obtained without thermal annealing or solvent annealing. The thermal and solvent annealing-free fabrication using the fullerene dyads as acceptor is very important for the roll to roll production of PSCs with flexible large area.

Key words: Polymer solar cell, Induced crystalline, Fullerene dyad