標題: | Ambient-Stable, Annealing-Free, and Ambipolar Organic Field-Effect Transistors Based on Solution-Processable Poly(2,2 \'-bis(trifluoromethyl)biphenyl-alt-2,5-divinylthiophene) without Long Alkyl Side Chains |
作者: | Chiang, Chi-Jui Chen, Jyh-Chien Tsao, Hsiang-Yen Wu, Kuan-Yi Wang, Chien-Lung 應用化學系 Department of Applied Chemistry |
關鍵字: | ambient-stability;ambipolar;annealing-free;organic field-effect transistors;poly(thienylenevinylene)s |
公開日期: | 28-Jan-2015 |
摘要: | An ambipolar conjugated polymer CF3-PBTV, poly(2,2-bis(trifluoromethyl)biphenyl-alt-2,5-divinylthiophene), consisting of thienylenevinylene as the donor and trifluoromethyl-substituted biphenyl as the acceptor has been successfully synthesized. CF3-PBTV shows solution-processability without electrically insulating long alkyl side chains. Grazing incidence X-ray diffraction results suggest a nearly equal population of flat-on and end-on domains in CF3-PBTV thin film. The excellent ambipolarity of CF3-PBTV is demonstrated by well-equivalent charge mobilities of 0.065 and 0.078 cm(2) V-1 s(-1) for p- and n-channel, respectively. The organic field-effect transistors (OFET) also shows very high on/off ratio (approximate to 10(7)) which is attributed to the relatively large bandgap and low-lying highest occupied molecular orbital (HOMO) of CF3-PBTV. The OFET performance barely changes after the device is stored in ambient conditions for 90 days. The ambient-stability is attributed to the enhanced oxidative stability from its low-lying HOMO and the better moisture resistance from its fluorine contents. The performance of CF3-PBTV based OFET is annealing independent. It is noteworthy that the solution-processable, ambipolar, and thienylenevinylene-containing conjugated polymer without any long alkyl side chains is reported for the first time. And to the best of our knowledge, it is the first ambient-stable, annealing-free OFET with well-equivalent ambipolarity. |
URI: | http://dx.doi.org/10.1002/adfm.201403428 http://hdl.handle.net/11536/124367 |
ISSN: | 1616-301X |
DOI: | 10.1002/adfm.201403428 |
期刊: | ADVANCED FUNCTIONAL MATERIALS |
Volume: | 25 |
起始頁: | 606 |
結束頁: | 614 |
Appears in Collections: | Articles |