標題: Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes
作者: Chang, Yu-Fan
Chen, Chun-Yu
Luo, Fang-Tsai
Chao, Yu-Chiang
Meng, Hsin-Fei
Zan, Hsiao-Wen
Lin, Hao-Wu
Horng, Sheng-Fu
Chao, Teng-Chih
Yeh, Han-Cheng
Tseng, Mei-Rurng
物理研究所
光電工程學系
Institute of Physics
Department of Photonics
關鍵字: Lamination;Polyethylene glycol;Low work function
公開日期: 1-Mar-2012
摘要: The low work function cathode of blade-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination without vacuum. The cathode is a bilayer of polyethylene glycol (PEG) (< 10 nm) and Al (100 nm). A sacrificial layer of polystyrene with low Mw 1500 and melting point of 120 degrees C is inserted between the cathode and PDMS for the subsequent mold removal at 150 degrees C by melting polystyrene. Current efficiency of 3 cd/A (1.1%) and luminance of 2500 cd/m(2) are achieved for green polyfluorene fluorescent emitter. 25 cd/A (8.2%) and 3200 cd/m(2) are achieved for green phosphorescent tris[2-(p-tolyl) pyridine] iridium(III) (Ir(mppy)(3)) emitter in polymer blend host. The efficiency is about 70% of the devices with thermally evaporated cathode. The turn-on voltage is about 5 V higher. (C) 2011 Elsevier B. V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.orgel.2011.11.008
http://hdl.handle.net/11536/15584
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2011.11.008
期刊: ORGANIC ELECTRONICS
Volume: 13
Issue: 3
起始頁: 388
結束頁: 393
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