Design, synthesis, and characterization of a novel c-donor-nc-bridge-c-acceptor type block copolymer for optoelectronic applications
作者:Sam-Shajing Sun、Jaleesa Brooks、Thuong Nguyen、Cheng Zhang
DOI:10.1002/pola.27098
日期:2014.4.15
A novel conjugated block copolymer system containing a donor‐type conjugated block (c‐D) covalently connected to an acceptor type conjugated block (c‐A) via a nonconjugated and flexible bridge chain (nc‐B), also called a DBA type block copolymer, has been designed, synthesized, and characterized for potential cost‐effective and high‐efficiency optoelectronic applications such as solar cells. Specifically
一种新型的共轭嵌段共聚物系统,其中包含通过非共轭柔性桥链(nc-B)共价连接至受体型共轭嵌段(c-A)的供体型共轭嵌段(c-D),也称为DBA型嵌段该共聚物已经过设计,合成和表征,可用于潜在的具有成本效益和高效的光电应用,例如太阳能电池。具体来说,D是区域规则的对-2-乙基己氧基取代的聚苯撑乙烯撑(或EH-RO-PPV),A是具有砜(SO 2)受体部分和线性氧化癸烷(‐OC 10 H 21)在每个亚苯基单元上取代的基团,并且B包含具有两个或四个亚甲基单元的脂族链。每个嵌段的大小可以通过单体和终止剂的合成进料比来控制。基于凝胶许可色谱法测得的D,A和DBA的平均分子量与使用单体:终止剂合成进料比计算的分子量高度吻合。初步的光电器件研究表明,在相同的制造和测试条件下,与相应的D / A混合物相比,DBA的光电功率转换效率提高了一个数量级。这种改进可以归因于与D / A混合物相比,DBA中更有效的光诱导电荷分离和电荷传输。©2014