Browsing by Author "Song, YH"

Now showing 1 - 2 of 2

Efficient and bright blue-emitting phosphorescent materials
(2005-10-01)
Yeh, SJ
;
Chen, CT
;
Song, YH
;
Chi, Y
;
Ho, MH
A new type of ancillary ligand for blue-emitting heteroleptic iridium complexes has been successfully developed. New ligands, 3-(trifluoromethyl)-5-( pyridin-2-yl)-1,2,4-triazolate and 5( pyridin-2-yl)-tetrazolate, show stronger blue-shifting power than that of the picolate of Flrpic [ iridium (III) bis(4,6-difluorophenylpyridinato) picolate]. Organic light-emitting diodes (OLEDs) fabricated with a new complex, Flrtaz [ iridium ( III) bis( 4,6-difluorophenylpyridinato)( 5-(pyridine-2-yl)-1,2,4-triazolate) or FlrN4 [(iridium ( III) bis( 4,6-difluorophenylpyridinato)( 5-(pyridin-2-yl)-tetrazolate], as the blue dopant in the host of mCP [ 1,3- bis(9-carbazolyl) benzene], exhibit near-saturated blue electrophosphorescence with Commision Internale de l'Eclairage (CIEx,y) coordinates of (0.14, 0.18) and ( 0.15, 0.24), respectively.
New dopant and host materials for blue-light-emitting phosphorescent organic electroluminescent devices
(2005-02-10)
Yeh, SJ
;
Wu, MF
;
Chen, CT
;
Song, YH
;
Chi, Y
Efficient organic light-emitting diodes (OLEDs) incorporating Ir-III bis(4,6-difluorophenylpyridinato)3-(trifluoromethyl)-5-(pyridin-2-yl)-1,2,4-triazolate (FIrtaz) and Ir-III bis(4,6-difluorophenylpyridinato)-5- (pyridin-2-yl)-1H-tetrazolate (FIrN4) demonstrate higher-purity blue-light emission than the long-known Ir-III bis(4,6-difluorophenylpyridinato)-picolate (FIrpic) phosphorophore. New host materials with higher glass-transition temperatures were also found to enhance the OLED performance.