標題: General application of blade coating to small-molecule hosts for organic light-emitting diode
作者: Chang, Hao-Wen
Lee, Yi-Ting
Tseng, Mei-Rurng
Jang, Meng-Hao
Yeh, Han-Cheng
Luo, Fang-Tsai
Meng, Hsin-Fei
Chen, Chin-Ti
Chi, Yun
Qiu, Yong
Duan, Lian
Lin, Hao-Wu
Horng, Sheng-Fu
Zan, Hsiao-Wen
物理研究所
Institute of Physics
公開日期: 1-十月-2014
摘要: Blade coating is applied to multi-layer phosphorescent OLED with five small-molecule hosts for the emission layer, including bis[3,5-di (9H-carbazol-9-yl)phenyl]diphenylsilane (SimCP2), 2,6-bis(3-(9H-carbazol-9-yl)phenyl) pyridine (26DCzPPy), 4,4\',4 \'\'-tris-(N-carbazolyl)-triphenylamine (TCTA), 9,9-bis[4-(3,6-di-tert-butylcarbazol-9-yl)phenyl]fluorene (TBCPF), and 2,7-bis(diphenylphosphoryl)-9,9\'-spirobi[fluorene] (SPPO13). In general, blade coating gives low surface roughness around 0.2 nm without phase separation of the emitter and the host. In the large area of 2 cm by 3 cm the film thickness distribution is within 10% and uniform light-emission is achieved. 1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) is added to tune the electron transport. Among all the hosts, 26DCzPPy and SimCP2 have by far the best electron hole balance and consequently show the highest efficiency. For SimCP2, the maximal efficiency is 15.8 cd/A for blue and 24.2 cd/A for white emission. The order of efficiencies for the hosts is found to be quite different from the order in vacuum evaporation for the same device structures. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.synthmet.2014.07.003
http://hdl.handle.net/11536/25352
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2014.07.003
期刊: SYNTHETIC METALS
Volume: 196
Issue: 
起始頁: 99
結束頁: 109
顯示於類別:期刊論文