Increasing the Content of <italic style="font-style: italic">β</italic> Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time

Ya-Di Liu; Qiang Zhang; Xin-Hong Yu; Jian-Gang Liu; Yan-Chun Han

doi:10.1007/s10118-019-2259-3

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Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time

ARTICLE | Updated：2021-02-18

- Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time
- Chinese Journal of Polymer Science Vol. 37, Issue 7, Pages: 664-673(2019)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  niitawh@ciac.ac.cn (J.G.L.)
  ychan@ciac.ac.cn (Y.C.H.)
- Funds：
- DOI：10.1007/s10118-019-2259-3
  CLC：
- Received：25 January 2019，
  
  Revised：2019-3-14，
  
  Accepted：21 March 2019，
  
  Online First：24 April 2019，
  
  Published：2019-07
- Accepted：
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Citation: Liu, Y. D.; Zhang, Q.; Yu, X. H.; Liu, J. G.; Han, Y. C. Increasing the content of , β, phase of poly(9,9-dioctylfluorene) by synergistically controlling solution aggregation and extending film-forming time. Chinese J. Polym. Sci. 2019, 37, 664–673

Ya-Di Liu, Qiang Zhang, Xin-Hong Yu, et al. Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time[J]. Chinese Journal of Polymer Science, 2019, 37(7): 664-673. DOI: 10.1007/s10118-019-2259-3.
Citation: Liu, Y. D.; Zhang, Q.; Yu, X. H.; Liu, J. G.; Han, Y. C. Increasing the content of , β, phase of poly(9,9-dioctylfluorene) by synergistically controlling solution aggregation and extending film-forming time. Chinese J. Polym. Sci. 2019, 37, 664–673 DOI： 10.1007/s10118-019-2259-3.

Ya-Di Liu, Qiang Zhang, Xin-Hong Yu, et al. Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time[J]. Chinese Journal of Polymer Science, 2019, 37(7): 664-673. DOI: 10.1007/s10118-019-2259-3. DOI：

摘要

Abstract

For poly(9

9-dioctylfluorene) (PFO)

phase (coplanar conformation with the intra-chain torsion angle of 165°) has a greater conjugation length and higher degree of order compared to those of

phase

which favors charge carrier transport. However

the highest content of

phase obtained so far is 45%. We propose to increase the content of

phase by promoting the solution aggregation of PFO molecules and extending film-forming time. For this purpose

8-diiodooctane (DIO) is added to PFO

-xylene solution

which enhances the interaction of PFO chains and improves the planarity of PFO backbone

resulting in the formation of ordered aggregation. The aggregates act as nucleation centers to promote the formation of

phase. The content of

phase increases with increasing DIO concentration and reaches a platform of 39% as DIO is more than 4 vol%. Furthermore

the film is kept in a sealed environment with

-xylene atmosphere for 3 h

thus the PFO molecules have enough time to diffuse to the crystallization front and achieve disorder-order transition. As a result

the crystallinity of PFO is improved significantly and the content of

phase increases to 52%

reaching the highest value reported so far.

关键词

Keywords

references

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Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time

DOI：10.1007/s10118-019-2259-3

摘要

Abstract

关键词

Keywords

references