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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 5
BKCSDE 34(5)
May 20, 2013 

Phosphorescent Iridium Complexes for OLEDs Based on 1-Phenylpyrazole Ligands with Fluorine and Methyl Moieties
Seung Soo Yoon*, Ji Young Song, Eun Jae Na, Kum Hee Lee, Seong Kyu Kim, Dong Whan Lim, Seok Jae Lee, Young Kwan Kim*
Phosphorescence, Iridium complex, Phenylpyrazole ligand, White OLED
A series of phosphorescent iridium(III) complexes 1-4 based on phenylpyrazole were synthesized and their photophysical properties were investigated. To evaluate their electroluminescent properties, OLED devices with the structure of ITO/NPB/mCP: 8% Iridium complexes (1-4)/TPBi/Liq/Al were fabricated. Among those, the device with 3 showed the most efficient white emission with maximum luminance of 100.6 cd/m2 at 15 V, maximum luminous efficiency of 1.52 cd/A, power efficiency of 0.71 lm/W, external quantum efficiency of 0.59%, and CIE coordinates of (0.35, 0.40) at 15.0 V, respectively.
1366 - 1370
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