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 |
Appears in Collections: | Articles |
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