Electropolymerization of Starburst Triarylamines and Their Application to Electrochromism and Electroluminescence

详细信息    查看全文

• 作者：Meng-Yen Chou ; Man-kit Leung ; Yuhlong Oliver Su ; Chang Ling Chiang ; Chang-Chih Lin ; Jun-Hong Liu ; Chin-Kuei Kuo ; and Chung-Yuan Mou
• 刊名：Chemistry of Materials
• 出版年：2004
• 出版时间：February 24, 2004
• 年：2004
• 卷：16
• 期：4
• 页码：654 - 661
• 全文大小：309K
• 年卷期：v.16,no.4(February 24, 2004)
• ISSN：1520-5002

文摘

Starburst triarylamines 2 and 3 were electropolymerized to form electrochromic thin films.Film from 2 showed intense absorption at 372 nm before voltage was applied. There weretwo absorption bands at 496 nm and 1000-2000 nm at 0.3 V, and a broad band, whichpeaked at 807 nm at 0.6 V. Film from 3 showed intense absorption at 372 nm before voltagewas applied. There were two absorption bands at 498 nm and 1000-2000 nm at 0.3 V, anda broad band, which peaked at 890 nm at 0.7 V. The switching time studies revealed thatthin film from 2 would require 3 s at 0.46 V for switching absorbance at 1600 nm and 1 s forbleaching. It would also require 4 s at 0.66 V for coloration at 800 nm and 2 s for bleaching.On the other hand, thin film from 3 would require 3 s at 0.46 V for switching absorbance at1500 nm and 1 s for bleaching. It would also require 3.3 s at 0.76 V for switching absorbanceat 900 nm and 1.5 s for bleaching. Electropolymerized thin films of 2 and 3 were also usedas the surface modification layers to modify the surface of ITO for polymeric light emittingdiode (PLED). To evaluate the performance of the modification layer, we selected a deviceof ITO/modification layer/PVK-Alq₃-coumarin 6/metal electrode as the standard forcomparison. We discovered that co-electropolymerization of the triarylamines 2 or 3 withpoly(vinylcarbazole) (PVK) on ITO greatly reduces the turn-on voltage of the PLED devicesand their performance is comparable to that of the commercially available PEDOT.