中国物理B ›› 2019, Vol. 28 ›› Issue (7): 76101-076101.doi: 10.1088/1674-1056/28/7/076101

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Control on β conformation of poly(9,9-di-n-octylfluorene) via solvent annealing

Zhi Chao Zhang(张志超), Bing Yue Zhang(张丙悦), Yu Yan Weng(翁雨燕), Tian Hui Zhang(张天辉)   

  1. 1 Center for Soft Condensed Matter Physics and Interdisciplinary Research and College of Physics, Soochow University, Suzhou 215006, China;
    2 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:2019-02-25 修回日期:2019-04-26 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Yu Yan Weng, Tian Hui Zhang E-mail:wengyuyan@suda.edu.cn;zhangtianhui@suda.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674235, 11374218, and 21204058), the National Laboratory of Solid State Microstructures, China (Grant No. M30036), and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions, China.

Control on β conformation of poly(9,9-di-n-octylfluorene) via solvent annealing

Zhi Chao Zhang(张志超)1, Bing Yue Zhang(张丙悦)1, Yu Yan Weng(翁雨燕)1,2, Tian Hui Zhang(张天辉)1   

  1. 1 Center for Soft Condensed Matter Physics and Interdisciplinary Research and College of Physics, Soochow University, Suzhou 215006, China;
    2 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2019-02-25 Revised:2019-04-26 Online:2019-07-05 Published:2019-07-05
  • Contact: Yu Yan Weng, Tian Hui Zhang E-mail:wengyuyan@suda.edu.cn;zhangtianhui@suda.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674235, 11374218, and 21204058), the National Laboratory of Solid State Microstructures, China (Grant No. M30036), and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions, China.

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摘要：

Films of poly(9,9-dioctylfluorene) (PFO) are of great importance in fabricating light emitting diodes. In practice, the β-phase of PFO is expected due to its high efficiency in the transport of charge carrier. To promote the formation of β-phase, PFO films are immersed and annealed in the mixture of solvent/nonsolvent. The effects of temperature, solvent/nonsolvent ratio, and annealing time are examined systematically. It is found that the fraction of β-phase can be highly improved by increasing the ratio of solvent/nonsolvent. The reconfiguration of PFO molecules for β-phase in annealing is generally finished in 10 min. The finding in this study demonstrates that solvent-assisted annealing offers a fast and economic approach for mass annealing.

关键词: organic crystal, conjugated polymer, solvent annealing

Abstract:

Films of poly(9,9-dioctylfluorene) (PFO) are of great importance in fabricating light emitting diodes. In practice, the β-phase of PFO is expected due to its high efficiency in the transport of charge carrier. To promote the formation of β-phase, PFO films are immersed and annealed in the mixture of solvent/nonsolvent. The effects of temperature, solvent/nonsolvent ratio, and annealing time are examined systematically. It is found that the fraction of β-phase can be highly improved by increasing the ratio of solvent/nonsolvent. The reconfiguration of PFO molecules for β-phase in annealing is generally finished in 10 min. The finding in this study demonstrates that solvent-assisted annealing offers a fast and economic approach for mass annealing.

Key words: organic crystal, conjugated polymer, solvent annealing

中图分类号:  (Polymers, organic compounds)

  • 61.82.Pv
61.82.Rx (Nanocrystalline materials) 81.40.Ef (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)