Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film Transistors
Siloxane-Terminated Solubilizing Side Chains: Bringing Conjugated Polymer Backbones Closer and Boosting Hole Mobilities in Thin-Film Transistors
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DOI：
10.1021/ja209328m
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发表时间：
2011-12-21
影响因子：
15
通讯作者：
Bao, Zhenan
中科院分区：
文献类型：
--
作者：
Mei, Jianguo;Kim, Do Hwan;Bao, Zhenan
我们引入了一种新型的硅氧烷封端的增溶基团，并证明了它作为一种基于异靛蓝的共轭聚合物的侧链的有效性。从溶液处理的薄膜晶体管中获得了2.00平方厘米每伏每秒（最大迁移率为2.48平方厘米每伏每秒）的平均空穴迁移率，这是迄今为止报道的最高迁移率之一。相比之下，带有支化烷基侧链的参比聚合物的平均空穴迁移率为0.30平方厘米每伏每秒，最大迁移率为0.57平方厘米每伏每秒。这在很大程度上可以通过聚合物的堆积来解释：我们的新型聚合物呈现出3.58埃的π - π堆积距离，而参比聚合物的距离为3.76埃。
We introduce a novel siloxane-terminated solubilizing group and demonstrate its effectiveness as a side chain in an isoindigo-based conjugated polymer. An average hole mobility of 2.00 cm(2) V-1 s(-1) (with a maximum mobility of 2.48 cm(2) V-1 s(-1)), was obtained from solution-processed thin-film transistors, one of the highest mobilities reported to date. In contrast, the reference polymer with a branched alkyl side chain gave an average hole mobility of 0.30 cm(2) V-1 s(-1) and a maximum mobility of 0.57 cm(2) V-1 s(-1). This is largely explained by the polymer packing: our new polymer exhibited a pi-pi stacking distance of 3.58 angstrom, while the reference polymer showed a distance of 3.76 angstrom.