Synthesis and thin film phase behaviour of functional rod-coil block copolymers based on poly(para-phenylenevinylene) and poly(lactic acid).
Synthesis and thin film phase behaviour of functional rod-coil block copolymers based on poly(para-phenylenevinylene) and poly(lactic acid).
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DOI：
10.1002/marc.201100012
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发表时间：
2011-06
影响因子：
4.6
通讯作者：
C. Braun;Benjamin Schöpf;Chheng Ngov;C. Brochon;G. Hadziioannou;Edward J. W. Crossland;S. Ludwigs
中科院分区：
文献类型：
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作者：
C. Braun;Benjamin Schöpf;Chheng Ngov;C. Brochon;G. Hadziioannou;Edward J. W. Crossland;S. Ludwigs
本文报道了一系列由棒状半导体聚（2，5-二（2 '-乙基己氧基）-1，4-亚苯基亚乙烯基）（DEH-PPV）嵌段和柔性聚乳酸（PLA）嵌段组成的嵌段共聚物的合成。这种可选择性降解的嵌段共聚物被设计为有机太阳能电池中本体异质结供体-受体层的自组装模板。一个层状微相分离的域结构被确定为嵌段共聚物与PLA体积分数在29和79%之间的散装和薄膜，使用SAXS，TEM和AFM。根据这两个块的比例，我们发现在薄膜中层状取向平行于或垂直于衬底。
We report the synthesis of a series of block copolymers consisting of a rod-like semiconducting poly(2,5-di(2'-ethylhexyloxy)-1,4-phenylenevinylene) (DEH-PPV) block and a flexible poly(lactic acid) (PLA) block that can be selectively degraded under mild conditions. Such selectively degradable block copolymers are designed as self-assembling templates for bulk heterojunction donor-acceptor layers in organic solar cells. A lamellar microphase-separated domain structure was identified for block copolymers with PLA volume fractions between 29 and 79% in bulk and thin films using SAXS, TEM, and AFM. Depending on the ratio of the two blocks we find either lamellae oriented parallel or perpendicular to the substrate in thin films.