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High Performance Top‐Emitting Organic Light‐Emitting Diodes for Super Video Graphics Array Monochromatic Microdisplays Application
Author(s) -
Wu Yukun,
Zhang Zhensong,
Yue Shouzhen,
Huang Ran,
Du Huan,
Zhao Yi
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500303
Subject(s) - chemistry , oled , luminous efficacy , optoelectronics , phosphor , iridium , quantum efficiency , light emitting diode , phosphorescence , fluorescence , optics , materials science , layer (electronics) , organic chemistry , physics , catalysis
We have demonstrated a high performance top‐emitting organic light‐emitting diode (TEOLED) achieving a brightness of 1000 cd/m 2 at a low voltage of 3.4 V, a power efficiency of 55.2 lm/W at a brightness of 611 cd/m 2 , and a low efficiency roll‐off 5.1% calculated from the maximum efficiency value to that of 5000 cd/m 2 . 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.