Efficient electron injection in organic light-emitting diodes using dipotassium phthalate as n-type dopant

Meng Huan Ho*, Ming Ta Hsieh, Jenn-Fang Chen, Shiao Wen Hwang, Chin H. Chen

*Corresponding author for this work

研究成果: Conference article同行評審

摘要

An efficient n-doped electron transport layer composed of 4, 7-diphenyl-1, 10-phenanthroline (BPhen) and dipotassium phthalate (PAK2) has been developed. By temperature-dependent admittance spectroscopy, the incorporation of PAK2 into BPhen is found to increase electron concentration in BPhen layer, resulting in raising the Fermi-level to ̃0.5 eV below its LUMO which further enhances the efficiency of electron injection from Al cathode. When this n-doped layer is adopted in OLED device, the green Alq3 device can achieve a current efficiency of 3.6 cd/A and a power efficiency of 2.1 lm/W at 20 mA/cm 2 and lower drive voltage of 5.3 V.

原文English
頁(從 - 到)2056-2059
頁數4
期刊Digest of Technical Papers - SID International Symposium
39
發行號1
DOIs
出版狀態Published - 30 十月 2008
事件2008 SID International Symposium - Los Angeles, CA, United States
持續時間: 20 五月 200821 五月 2008

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