5.1: Fluorescent RGB OLEDs with High Performance

Abstract

We developed highly efficient fluorescent dopants for full‐color OLEDs. For blue, green and red OLEDs, current efficiencies of 8.7cd/A, 20.5 cd/A and 11.4 cd/A at 10mA/cm2 were achieved, respectively. Lifetime of the blue device was estimated to be 23,000hours at an initial luminance of 1,000 cd/m2. Moreover, long lifetime of 100,000 hours was estimated in the green and red devices. By the use of these dopants, we expect that a full‐color OLED display with the lifetime of 18,000 hours at a white luminance of 300 cd/m2 can be achieved.

Electrical doping is paving the way for the implementation of OLEDs in consumer electronics

“…The key to this problem is the chemical stability of the blue-emitter materials. In this context, the longest lifetime reported to date was announced last year by Idemitsu Kosan [1]. Using their fluorescent blue emitter material, it took 23 000 hours of continuous operation until the luminance of a corresponding OLED dropped to half the initial brightness of 1000 cd/m 2 .…”

Core-Structure Effects of Novel Indenopyrazine Derivatives for Blue Emitter

“…These days, red emitters with CIE coordinates (0.67, 0.33), long lifetime of more than 100,000 hours and luminance efficiency of 11 cd/A have been produced, and green emitters with CIE coordinates (0.29, 0.64), lifetime of 100,000 hours and luminance efficiency of 21 cd/A have been also developed. 3 Blue emitters, however, have CIE coordinates (0.14, 0.16), efficiency of 7 cd/A and lifetime of only 12,000 hours even when using doping. 3 As they show lower efficiency and shorter lifetime, compared to red and green emitters, new blue emitters are presently in much need of development.…”

“…3 Blue emitters, however, have CIE coordinates (0.14, 0.16), efficiency of 7 cd/A and lifetime of only 12,000 hours even when using doping. 3 As they show lower efficiency and shorter lifetime, compared to red and green emitters, new blue emitters are presently in much need of development. In addition, the blue emitters become deteriorated in performance in case adopting the hole injection layer (HIL) and the hole transporting layer (HTL) used in common in green and red emitters.…”

Spin and device engineering for blue organic light emitting devices

“…offer only about 25% of the phosphorescent efficiencies achieved in red and green. 2 The two approaches we discuss here use device architecture to address a weakness of each material set: phosphorescent saturation, and fluorescent efficiency. The first approach is to employ a highlyefficient but unsaturated blue phosphorescent material in a microcavity.…”