標題: Solution-processed small molecular electron transport layer for multilayer polymer light-emitting diodes
作者: Liu, Zong-You
Tseng, Shin-Rong
Chao, Yu-Chiang
Chen, Chun-Yu
Meng, Hsin-Fei
Horng, Sheng-Fu
Wu, Yu-Hsun
Chen, Su-Hua
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: Blade coating;Solution-processed electron transport layers
公開日期: 1-Mar-2011
摘要: Solution-processed electron transport layers (ETL) have been fabricated by solution process and applied in multilayer polymer light-emitting diodes with tris[2-(p-tolyl)pyridine]iridium(III) blended in poly(vinylcarbazole) as the emissive layer. Three kinds of small molecular electron transport materials, including 2,2',2 ''-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)(TPBi),3-(4-biphenyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ), and 4,7-diphenyl-1,10-phenanthroline (BPhen), are tested and dissolved in methanol to form electron transport layers by blade coating. Such electron transport layer provides efficient electron injection and electron transport ability in the devices. The efficiency of the devices with the combination of ETL and LiF/Al cathode reaches 21.5 cd/A at 10 V (4050 cd/m(2)). The efficiency of the devices without ETL are 3.5 cd/A (13 V) for LiF/Al cathode and 17 cd/A (7 V) for CsF/Al cathode at 1000 cd/m(2). The aggregation of the solution-processed ETL can be controlled by annealing temperature to further optimize the device performance to maximal efficiency of 53 cd/A. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.synthmet.2010.12.021
http://hdl.handle.net/11536/9189
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2010.12.021
期刊: SYNTHETIC METALS
Volume: 161
Issue: 5-6
起始頁: 426
結束頁: 430
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