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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65098

    Title: 聚(3-己基噻吩)(poly(3-hexylthiophene)均聚物在不同溶劑性質下之團聚形貌研究
    Authors: 詹德群;Zhan,De-qun
    Contributors: 化學工程與材料工程學系
    Keywords: 共軛高分子;聚(3-己基噻吩);團聚;韓森溶解度參數;激子耦合分析;Conjugated polymers;P3HT;Aggregation;Hansen solubility parameters;Excitonic coupling analysis
    Date: 2014-08-28
    Issue Date: 2014-10-15 14:40:18 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 近年來利用調控不同溶劑性質來引導聚(3-己基噻吩)(poly(3-hexylthiophene) , P3HT)在溶液中結晶受到廣大的關注,比起單純利用溶劑退火或是熱退火等後處理,此方法有利於大量製造結晶度較高的奈米纖維。由於良好的有機元件的性質通常取決於良好的結構,探究其溶劑性質對於結構的影響有其必要。
    ;Organic devices have attracted great interests due to their advantages of low cost, solution-based processes, and flexibility. Poly(3-hexylthiophene)(P3HT), as a typical linear conjugated polymer, have been applied in commercial processes.
    In this study, we focused on the conformation of P3HT chains in three organic solvents of different selectivity. The chain conformation in the dilute solutions affected the morphology in solid state. By controlling the composition of binary co-solvent mixtures, the drive force of P3HT aggregation can be finely tuned.
    THF is a good solvent for the thiophene backbone and but a poor one for the 3-hexyl side chain. In contrast, the affinity of cyclohexane shows an opposite trend, being good for 3-hexyl side chains but poor for the thiophene backbone. The selectivity of toluene lies between THF and cyclohexane. Next I added a series of alcohols with different CH2 length to tune the solvent quality to form P3HT aggregates with different nanostructures in solutions.
    UV-vis and PL measurements were used to identify the correlations between solvent quality and the degree of ordering in aggregates. AFM and GIWAXD characterizations were carried out to investigate the P3HT morphology and the degree of crystallization in solid state. As the polarization of alcohols increased, the aging rate increased. the nearest-neighbor inter-chain coulombic coupling J0 did not significantly change. J0 is sensitive to the selectivity of solvents and the ratios of alcohols in binary co-solvent mixtures.
    P3HT aged quickly in the solvent mixture of THF/alcohols and formed large-sized aggregation structures with disorder orientation. In the solvent mixtures of toluene/ alcohols (except for toluene/1-propanol), P3HT formed single fibers and well dispersed. In contrast, P3HT in the cosolvent mixtures of cyclohexane/alcohols was found to form bundles of nano-sized fibers with high orientational ordering.
    Appears in Collections:[化學工程與材料工程研究所] 博碩士論文

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