https://scholars.lib.ntu.edu.tw/handle/123456789/444686
標題: | Self-organization and phase transformation of all π-conjugated diblock copolymers and its applications in organic solar cells | 作者: | Shen, C. Lee, Y.-H. Lee, Y.-P. Chiang, C.-J. Wei, F.-K. Wu, C.-H. Kau, K.-C. Liu, H.-W. Hsieh, C.-C. Wang, L. CHI-AN DAI CHIH-CHEN HSIEH |
公開日期: | 2016 | 卷: | 108 | 起(迄)頁: | 94-102 | 來源出版物: | Reactive and Functional Polymers | 摘要: | In this study, we report on the synthesis and self-assembling behavior of a series of monodisperse all π-conjugated poly(2,5-dihexyloxyp-phenylene)-block-(3-hexylthiophene) (PPP-P3HT) block copolymer system and construct its phase diagram that exhibits diverse nanostructures of predominant PPP nanofibers, PPP-P3HT lamellae, broken lamellae and predominant P3HT nanofibers as a function of the copolymer composition. An order-to-disorder phase transition is also observed for the copolymers at a temperature above the melting point of the predominant blocks, indicating the rod-rod interaction between the corresponding π-conjugated chains plays a key role in the formation and the stabilization of the observed nanostructures. In particular, we have also found that the incorporation of PPP segments to P3HT to form nanofibrillar structure significantly enhance the self-organization behavior of the P3HT in the copolymer. The improvements in crystallinity and mobility for the copolymers therefore substantially enhance their solar cell performance. The use of this novel material with diverse nanostructures provides a new strategy to enhance photovoltaic performance and shows the potential for use in future optoelectronic applications. © 2016 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/444686 | DOI: | 10.1016/j.reactfunctpolym.2016.06.007 | SDG/關鍵字: | Block copolymers; Nanofibers; Nanostructures; Organic solar cells; Phase diagrams; Phase transitions; Solar cells; Conjugated chain; Copolymer compositions; Crystallinities; ITS applications; Optoelectronic applications; Photovoltaic performance; Self organizations; Solar cell performance; Nanostructured materials |
顯示於: | 化學工程學系 |
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