P‐109: High‐Performable Green‐Emitting OLEDs

Abstract

High‐performance green emitters for OLEDs have been studied. New green emitters, C‐GEM1, C‐GEM2 and C‐GEM3, showed high efficiency and long lifetime when making devices using each material as an emitter. The optimized device demonstrated an external quantum efficiency of over 6% and a power efficiency of 26 lm/W at 1,000 cd/m2 with the lifetime of over 25,000 hours.

Recent Development of Blue Fluorescent OLED Materials and Devices

“…Similar improvement of extremely efficient green phosphorescent devices ( 40 cd/A) with operational stability of 20 000 h at an initial luminance of 1000 cd/cm and a 1931 Commission Internationale de L'Eclairage close to (0.31, 0.64) has also been disclosed by many which include UDC [3], Chi Mei [4], Covion [5], [33], and Canon [6]. It is expected that, in the future, we would also find one of these green phosphorescent materials ending up in some forms of OLED products in the marketplace.…”

5.1: Fluorescent RGB OLEDs with High Performance

“…Especially the very high efficiency of a phosphorescent green OLED was established [3]. On the other hand, a fluorescent green OLED with a power efficiency of 26 lm/W and a lifetime of 25,000 hours were reported [4]. Fluorescent OLEDs still have the possibility to solve a lifetime problem for OLEDs.…”