Naphthalenediimides Fused with 2-(1,3-Dithiol-2-ylidene)acetonitrile: Strong Electron-Deficient Building Blocks for High-Performance n-Type Polymeric Semiconductors

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• 作者：Zheng Zhao ; Fengjiao Zhang ; Yunbin Hu ; Zhongli Wang ; Bing Leng ; Xike Gao ; Chong-an Di ; Daoben Zhu
• 刊名：ACS Macro Letters
• 出版年：2014
• 出版时间：November 18, 2014
• 年：2014
• 卷：3
• 期：11
• 页码：1174-1177
• 全文大小：231K
• ISSN：2161-1653

文摘

Naphthalenediimides (NDI) fused with two 2-(1,3-dithiol-2-ylidene)acetonitrile moieties (NDI-DTYA2), a novel strong electron-deficient monomer, was designed and readily synthesized by aromatic nucleophilic substitution to develop n-type polymers. Two NDI-DTYA2 based donor鈥揳cceptor (D鈥揂) polymers P(NDI-DTYA2鈥?T) and P(NDI-DTYA2鈥?T) have been prepared (1T = thiophene, 2T = 2,2鈥?bithiophene) and showed low-lying LUMO energies (<鈭?.2 eV) and near-infrared optical absorptions (optical band gap <1.3 eV). Although the film feature of these polymers is amorphous, pure electron transport with high mobility of up to 0.38 cm² V ^鈥? s ^鈥? could be achieved for their bottom gate organic thin film transistors, which was among the highest performances for unipolar n-type polymers. The results demonstrate that NDI-DTYA2 derivatives are promising building blocks for developing electron transport 蟺-functional materials.