Thieno[3,2-b]thiophene-Bridged D鈭捪€鈥揂 Polymer Semiconductor Based on Benzo[1,2-b:4,5-b鈥瞉dithiophene and Benzoxadiazole

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• 作者：Xiaochen Wang ; Pei Jiang ; Yu Chen ; Hao Luo ; Zhiguo Zhang ; Haiqiao Wang ; Xiaoyu Li ; Gui Yu ; Yongfang Li
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：June 25, 2013
• 年：2013
• 卷：46
• 期：12
• 页码：4805-4812
• 全文大小：517K
• 年卷期：v.46,no.12(June 25, 2013)
• ISSN：1520-5835

文摘

Thieno[3,2-b]thiophene-bridged polymer semiconductor, P(BDT-TT-BO), featuring benzoxadiazole (BO) acceptor unit was designed and synthesized. P(BDT-TT-BO) showed broad absorption, in the wavelength range of 350鈥?00 nm, and low highest occupied molecular orbital (HOMO) energy level (鈭?.31 eV). The benzoxadiazole-based polymer semiconductor exhibited very promising optoelectronic performance. Power conversion efficiency of the polymer solar cell with P(BDT-TT-BO) as donor reached 7.05%, which is the champion efficiency in benzoxadiazole containing conjugated polymers and comparable to that of the most efficient benzothiadiazole-based donor polymers. The sensitive dependence of carrier mobility on the annealing temperature of the polymer semiconductors was systematic studied. After annealing at 200 掳C, P(BDT-TT-BO)-based polymer field effect transistor showed a mobility of more than 12 times that of unannealed devices, reached 0.023 cm² V^鈥? s^鈥?, with a high on/off current ratio of 2.7 脳 10⁵.