题目：

Large Modulation of Charge Transport Anisotropy by Controlling the Alignment of π�π Stacks in Diketopyrrolopyrrole-Based Polymers

作者：

Shuanghua Wei , Yuyue Zhang , Jie Liu , Xiaohui Li , Yangjiang Wu , Hong Wei ,Yuyan Weng , Xu Gao , Yuning Li , Sui-Dong Wang , * and Zhijun Hu *

单位：

Jiangsu Key Laboratory for Carbon Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China

Research Center for Functional Organic/Polymer Micro/Nanofabrication College of Chemistry Chemical Engineering and Materials Soochow University Suzhou 215123 , China

摘要：

Semiconducting polymers have received considerable attentions due to their solution processability and flexibility for use in low-cost and large-area optoelectronic devices such as thin film field effect transistors (FETs) and photovoltaic cells. The solution processability allows one to easily prepare uniform thin films by high-throughput methods such as spin coating,drop casting, inkjet printing, and roll-to-roll printing. Because of high and uncontrolled nucleation density in the semicrystalline π-conjugated polymers, a random in-plane orientation of polymer chains and/or π-stacked lamellar crystals is usually obtained under the solvent casting crystallization conditions.  Although the semiconducting polymer thin films can be post-annealed using solvent or thermal treatment to increase the crystallinity, the large entropy in a polymer system hinders the formation of single-crystalline thin films. The fi lm morphology thus typically comprises ordered, nanocrystalline π-stacked lamellae embedded in amorphous matrix. The random in-plane orientation of polymer chains and π-stacked lamellar crystals, and the existence of amorphous matrix both result in a relatively low average charge transport mobility μ in FET devices.  The development of high-mobility semiconducting polymers requires, thus,not only a deep insight into the structure-property relationship at the molecular level, but also a thorough understanding of the interplay between the hierarchical morphologies and electric properties, which is unfortunately far from being clearly articulated.

影响因子：

新期刊

分区情况：

新期刊

链接：

http://onlinelibrary.wiley.com/doi/10.1002/admi.201500153/full