Alternating Electron Donor鈥揂cceptor Conjugated Polymers Based on Modified Naphthalene Diimide Framework: The Large Enhancement of p-Type Semiconducting Performance upon Solvent Vapor Annealing

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• 作者：Yonghai Li ; Guanxin Zhang ; Zitong Liu ; Xin Chen ; Jianguo Wang ; Chong鈥檃n Di ; Deqing Zhang
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：July 23, 2013
• 年：2013
• 卷：46
• 期：14
• 页码：5504-5511
• 全文大小：459K
• 年卷期：v.46,no.14(July 23, 2013)
• ISSN：1520-5835

文摘

Three new alternating conjugated D鈥揂 polymers P1, P2, and P3 are reported. They entail a new expanded conjugated framework that is derived from naphthalene diimide (NDI) possesses planar structure and moderate electron-accepting capacity. Benzo[1,2-b:4,5-b鈥瞉dithiophene with alkoxyl and alkyl chains and thiophene are the respective electron-donating moieties. These conjugated polymers are thermally stable under 325 掳C based on their TGA data. P1, P2, and P3 exhibit similar HOMO (ca. 鈭?.39 to 鈭?.43 eV) and LUMO (ca. 鈭?.58 to 鈭?.59 eV) energies according to their absorption spectra and redox potentials. The results reveal that P1, P2, and P3 can be solution-processed, and the resulting OTFTs exhibit hole mobilities in the range of (1.3鈥?.0) 脳 10^鈥? cm² V^鈥? s^鈥? and current on/off ratios of 10⁵鈥?0⁷ after conventional thermal annealing. Notably, hole mobilities of thin films of P2 and P3 increase to 0.024 and 0.135 cm² V^鈥? s^鈥?, respectively, upon solvent vapor annealing.