Abstract-Highlights of the recent development of highly efficient and robust blue fluorescent organic light-emitting device (OLED) materials and devices are reviewed with emphasis on work accomplished at the
We have developed new phosphorescent hosts having an electron transporting triazine molecular skeleton connected to hole transporting carbazolyl moieties, designed in order to attain high thermal stability, triplet energy sufficiently high enough to be compatible with phosphorescent green dopants. Green phosphorescent OLEDs using PH2 and PH3 achieved longer lifetime (T 80 = 37h, 22h at L 0 of 10000nits), seven fold increase in power efficiency at low driving voltage (~ 4V) compared to CBP, with 17% external quantum efficiency.
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