標題: White organic electroluminescence from an exciplex based on the novel substituted aluminium quinolate complex
作者: Cheng, JA
Chen, CH
應用化學系
友訊交大聯合研發中心
Department of Applied Chemistry
D Link NCTU Joint Res Ctr
公開日期: 2005
摘要: A saturated white organic light-emitting device was obtained from an exciplex mechanism by using a novel blue-green fluorescent tris(5-mesitylsulfone-8-hydroxyquinolato)aluminium(III), Al(MSq)(3). Its absorption and photoluminescence appear at 3.25 eV and 2.56 eV. In photoluminescence, an exciplex, generated from an Al(MSq)(3)/TPD blend, was found at 2.10 eV. The lifetime of the Al(MSq)(3)/TPD blend is 22.3 ns, which is longer than that of either Al(MSq)(3) or TPD. Due to the exciplex formation, the orange light generated can be combined with the blue-green light generated from Al(MSq)(3) to achieve a white light emission. In an optimized electroluminescence device structure of [glass/ITO (200 nm)/PEDOT:PSS (75 nm)/blend (72 nm)/BCP (8 nm)/LiF (1 nm)/Al (200 nm)], the saturated white light emission was observed at Commision Internationale De L'Eclairage (CIE) coordinates of (0.35, 0.34). The EL spectrum of the device is also independent of the applied voltage. Its maximum brightness and efficiency are 26 cd m(-2) at 15.2 V/67 mA cm(-2), and 597 muW A(-1) at 12.5 V/28 mA cm(-2), respectively.
URI: http://hdl.handle.net/11536/25448
http://dx.doi.org/10.1039/b415095c
ISSN: 0959-9428
DOI: 10.1039/b415095c
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 15
Issue: 11
起始頁: 1179
結束頁: 1185
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