Effect of solvent-assisted nanoscaled organo-gels on morphology and performance of organic solar cells

Li Jian Zuo, Xiao Lian Hu, Tao Ye, Thomas R. Andersen, Han Ying Li, Min Min Shi, Mingsheng Xu, Jun Ling, Qiang Zheng, Jun Ting Xu, Eva Bundgaard, Frederik C. Krebs, Hong Zheng Chen

科研成果: 期刊稿件文章同行评审

20 引用 (Scopus)

摘要

This paper reports how the morphology of a polymer-fullerene derivative blend is tuned via the different aggregate states of the polymer in solutions. Based on a copolymer with benzodiothiophene and thiophene-3-carboxylate as alternating units (PBDTCT), we explored the polymer aggregation (i.e., organo-gels) behavior as a function of steric hindrance of aromatic solvents imposed by substituents. We showed that the size of organo-gels decreased as the substituents of solvents got larger. Also, the phase separation and domain size of the subsequent spin-coated films increased monotonically with that of the organo-gels in solution. Through this knowledge, we eventually achieve controlled morphology and optimized organic solar cells (OSCs) performance. Our results present a significant step forward for understanding the self-assembly behavior of conjugated polymers, control of their morphology and optimization of OSC performance.

源语言英语
页(从-至)16893-16900
页数8
期刊Journal of Physical Chemistry C
116
32
DOI
出版状态已出版 - 16 8月 2012
已对外发布

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