Abstract
AbstractWe have demonstrated a high performance top‐emitting organic light‐emitting diode (TEOLED) achieving a brightness of 1000 cd/m2 at a low voltage of 3.4 V, a power efficiency of 55.2 lm/W at a brightness of 611 cd/m2, and a low efficiency roll‐off 5.1% calculated from the maximum efficiency value to that of 5000 cd/m2. Such improved properties are controlled by electron injection from 7‐diphenyl‐1,10‐phenanthroline (BPhen) into and transport by the 2,4,6‐tris[3′‐(pyridin‐3‐yl)biphenyl‐3‐yl]‐1,3,5‐triazine (TmPPPyTz) layer along with hole injection from 4,4′,4′′‐tris(N‐carbazolyl)diphenylamine (TcTa) directly into the fac‐tris(2‐phenylpyridine)iridium [Ir(ppy)3] highest occupied molecular level (HOMO), leading to direct carrier recombination and excitons formation on the phosphor dopants. Eventually we integrated our high performance TEOLEDs on complementary metal oxide semiconductor (CMOS) substrates to realize super video graphics array (SVGA) OLED microdisplays.
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