標題: Deep blue light-emitting diode based on high molecular weight poly(9,9-dioctylfluorene) with high efficiency and color stability
作者: Tseng, Shin-Rong
Li, Shiuan-Yi
Meng, Hsin-Fei
Yu, Yi-Hsiang
Yang, Chia-Ming
Liao, Hua-Hsien
Horng, Sheng-Fu
Hsu, Chian-Shu
應用化學系
物理研究所
Department of Applied Chemistry
Institute of Physics
關鍵字: polymer light-emitting diodes;blocking layer;molecular weight;deep blue;stability
公開日期: 1-Jun-2008
摘要: A highly efficient deep blue polymer light-emitting diode based on poly(9,9-dioctylfluorene) is demonstrated. The performance is found to increase significantly with the molecular weight. Two different molecular weights are compared, one is 71,000 and the other is 365,000. The electroluminescent efficiency and color stability are improved by slightly doping hole traps into the emission layer and bilayer structure. The maximum efficiency is 3.8 cd/A with the corresponding external quantum efficiency of 3.7% at deep blue with Commission Internationale de L'Eclairage (CIE) coordinate at (0.15, 0.09). Stable blue emission is maintained up to 6600 cd/m(2) without growth of green shoulder in emission spectrum. (C) 2007 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.orgel.2007.11.003
http://hdl.handle.net/11536/8739
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2007.11.003
期刊: ORGANIC ELECTRONICS
Volume: 9
Issue: 3
起始頁: 279
結束頁: 284
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