Novel Efficient Non-doped Blue Phosphorescent Light-emitting Organic Diodes Based on Bi-(2’,6’-Difluoro-2,3’-bipyridinato-N,C4’)Iridium(Ⅲ) (3-Acetyl -1,7,7-trimethylbicyclo[2.2.1]Heptan-2-one -O,O)
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Novel Efficient Non-doped Blue Phosphorescent Light-emitting Organic Diodes Based on Bi-(2’,6’-Difluoro-2,3’-bipyridinato-N,C4’)Iridium(Ⅲ) (3-Acetyl -1,7,7-trimethylbicyclo[2.2.1]Heptan-2-one -O,O)
Chinese Journal of LuminescenceVol. 35, Issue 10, Pages: 1158-1164(2014)
LUO Kai-jun, ZHANG Chen-yang, SU Yi-wei etc. Novel Efficient Non-doped Blue Phosphorescent Light-emitting Organic Diodes Based on Bi-(2’,6’-Difluoro-2,3’-bipyridinato-N,C4’)Iridium(Ⅲ) (3-Acetyl -1,7,7-trimethylbicyclo[2.2.1]Heptan-2-one -O,O)[J]. Chinese Journal of Luminescence, 2014,35(10): 1158-1164
LUO Kai-jun, ZHANG Chen-yang, SU Yi-wei etc. Novel Efficient Non-doped Blue Phosphorescent Light-emitting Organic Diodes Based on Bi-(2’,6’-Difluoro-2,3’-bipyridinato-N,C4’)Iridium(Ⅲ) (3-Acetyl -1,7,7-trimethylbicyclo[2.2.1]Heptan-2-one -O,O)[J]. Chinese Journal of Luminescence, 2014,35(10): 1158-1164 DOI: 10.3788/fgxb20143510.1158.
Novel Efficient Non-doped Blue Phosphorescent Light-emitting Organic Diodes Based on Bi-(2’,6’-Difluoro-2,3’-bipyridinato-N,C4’)Iridium(Ⅲ) (3-Acetyl -1,7,7-trimethylbicyclo[2.2.1]Heptan-2-one -O,O)
A new blue phosphorescent iridium(Ⅲ) complex based on 2'
6'-difluoro-2
3'-bipyridine and 3-Acetyl-camphor
(dfpypy)
2
Ir(acam) was synthesized. The complex emits bright blue phosphorescence with
max
at 466 nm accompanied a weakly shoulder peak at 487 nm and has the full-width at half maximum (FWHM) of 55 nm. The photoluminescence (PL) quantum yield in degassed THF solution at room temperature is estimated to be 0.51. The efficient non-doped blue phosphorescent electroluminescence devices were fabricated. The structure of devices is ITO/HATCN(1 nm)/TAPC(40 nm)/(dfpypy)
2
Ir(acam) (10 nm)/BmpypB (40 nm)/LiF(1 nm)/Al(90 nm). The devices show electroluminescence with
max
at 474 nm. The devices have
V
on
value of 3.5 V. At a current density of 20 mAcm
-2
CIE coordinates are (0.17
0.29). Maximum brightness of 2 170 cdm
-2
is achieved at driven voltage of 11 V. At driven voltage of 4.2 V
maximum power efficiency of 5.25 lmW
-1
and maximum luminance efficiency of 6.45 cdA
-1
are obtained
respectively.
关键词
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references
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