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.
|Number of pages||3|
|Journal||Digest of Technical Papers - SID International Symposium|
|State||Published - 30 Oct 2008|
|Event||2008 SID International Symposium - Los Angeles, CA, United States|
Duration: 20 May 2008 → 21 May 2008