標題: High-efficiency blue multilayer polymer light-emitting diode fabricated by a general liquid buffer method
作者: Tseng, Shin-Rong
Meng, Hsin-Fei
Yeh, Chi-Hung
Lai, Huan-Chung
Horng, Sheng-Fu
Liao, Hua-Hsien
Hsu, Chain-Shu
Lin, Li-Chi
應用化學系
物理研究所
電子工程學系及電子研究所
Department of Applied Chemistry
Institute of Physics
Department of Electronics Engineering and Institute of Electronics
關鍵字: polymer light-emitting diodes;multilayer;blue;white;high efficiency
公開日期: 1-Feb-2008
摘要: A bright, highly efficient blue polymer light-emitting diode is fabricated by spin-coating with multilayer structure. By introducing a liquid buffer layer, the dissolution problem is overcome successfully. This general method can be applied to fabricate arbitrary polymer multilayer structure, in particular the addition of the carrier blocking layers to balance the electron and hole currents and improve the device efficiency. By adding an electron-blocking layer, the external quantum efficiency for blue emission can be increased to 5.5% (9.1 cd/A) which is even higher than the theoretical limit of 5%. The luminance reaches 26,530cd/m(2) and the Commission Internationale de L'Eclairage (CIE) coordinates is (0.15, 0.23). Further more the lifetime is increased by three times relative to the single layer device. (c) 2007 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.synthmet.2007.12.016
http://hdl.handle.net/11536/9733
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2007.12.016
期刊: SYNTHETIC METALS
Volume: 158
Issue: 3-4
起始頁: 130
結束頁: 134
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