Enhanced power efficiency of single-layer white triplet polymer light-emitting diodes by blending with polymer oxides

Yung Shiuan Chen, Shang Chieh Chien, Fang-Chung Chen*, Jan Tian Lian, Chien Lung Tsou, Chi Neng Mo

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

In this study, we have demonstrated enhanced performance of blue, red and white phosphorescent polymer light-emitting diodes (PLEDs) by blending poly(ethylene glycol) (PEG) into the active layer of the devices. By introducing PEG into the PLEDs, the turn-on voltages of these devices became lower than those of the conventional devices. In addition, the luminance efficiency and the external quantum efficiency of the blue and white phosphorescent PLEDs were both improved. Most important of all, because of the lower operating voltage, the higher power efficiency (7.3 lm/W, 1.5 lm/W, 4.61m/W) of the blue, red and white phosphorescent PLEDs than those of the control devices (2.9 lm/W, 1.9 lm/W, 1.9 lm/W) have been achieved, respectively. Finally, the improvement mechanism will be discussed.

Original languageEnglish
Pages (from-to)2043-2045
Number of pages3
JournalDigest of Technical Papers - SID International Symposium
Volume39
Issue number3
DOIs
StatePublished - 30 Oct 2008
Event2008 SID International Symposium - Los Angeles, CA, United States
Duration: 20 May 200821 May 2008

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