Manipulating the Crystallization of Methanofullerene Thin Films with Polymer Additives

Manipulating the Crystallization of Methanofullerene Thin Films with Polymer Additives
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用聚合物添加剂控制亚甲基富勒烯薄膜的结晶

DOI:
10.1002/macp.201200341
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发表时间:
2012-10
影响因子:
2.5
通讯作者:
韩艳春
韩艳春
中科院分区:
化学4区
文献类型:
--
作者:
韩艳春

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采用微量(1% ~ 5%)聚合物[聚苯乙烯(PS)、聚甲基丙烯酸甲酯(PMMA)和聚3-己基噻吩(P3HT)]作为添加剂,对[6,6]-苯基- c61丁酸甲酯(PCBM)薄膜进行冷结晶操作。通过调整聚合物添加剂的种类、分子量和数量,可以制备出由连接良好的畴和孤立的球粒组成的高结晶PCBM薄膜。在成核阶段,聚合物添加剂对PCBM的成核有抑制作用。在生长阶段,我们认为PCBM的生长速率是由PCBM分子扩散决定的,这与聚合物的分子迁移率和结晶度密切相关。
Trace amount (1% to 5%) of polymers [polystyrene (PS), poly(methyl methacrylate) (PMMA), and poly(3-hexylthiophene) (P3HT)] are utilized as additives to manipulate the cold crystallization of [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) thin films. Highly crystalline PCBM films made up of well-connected domains and isolated spherulites with tunable size are produced by adjusting the type, molecular weight, and amount of polymer additives. In the nucleation stage, the polymer additives are demonstrated to have a depressing effect on PCBM nucleation. In the growth stage, we suggest that the PCBM growth rate is determined by PCBM molecular diffusion, which is demonstrated to have close correlations with the molecular mobility and crystallinity of the polymer.
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