Fused Ring Cyclopentadithienothiophenes as Novel Building Blocks for High Field Effect Mobility Conjugated Polymers

详细信息    查看全文

• 作者：Hongliang Zhong ; Yang Han ; Jessica Shaw ; Thomas D. Anthopoulos ; Martin Heeney
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：August 25, 2015
• 年：2015
• 卷：48
• 期：16
• 页码：5605-5613
• 全文大小：435K
• ISSN：1520-5835

文摘

A novel electron-rich cyclopentadithienothiophene (9H-thieno[3,2-b]thieno[2鈥?3鈥?4鈥?5鈥瞉thieno[2鈥?3鈥?3,4]cyclopenta[1,2-d]thiophene, CDTT) is reported by an optimized one-pot procedure involving two sequential lithiation/acylation steps. Three novel copolymers containing the varied electron-deficient acceptors 2,1,3-benzothiadiazole (BT), 5,6-difluoro-2,1,3-benzothiadiazole (DFBT) and naphtho[1,2-c:5,6-c]bis[1,2,5]-thiadiazole (NT) were prepared by Stille polymerization. These three polymers show promising charge transport properties in transistor devices, with PCDTT-BT exhibiting unipolar hole mobility up to 0.67 cm² V^鈥? s^鈥? in top gate devices utilizing gold source drain electrodes. Changing to a bilayer electrode of Al/Au resulted in ambipolar transistor behavior, with PCDTT-DFBT exhibiting balanced hole and electron mobilities of 0.38 and 0.17 cm² V^鈥? s^鈥? respectively. These results clearly demonstrate that CDTT is a promising new building block for conjugated polymers.