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P‐163: Carbazole‐Isoquinoline Hybrid Bipolar Host Material for Highly Efficient Green Electrophosphorescent OLEDs
Author(s) -
Lee Kum Hee,
Kang Hyun Ju,
Kim Seul Ong,
Yoon Seung Soo,
Kim Heo Min,
Seo Ji Hyun,
Kim Young Kwan
Publication year - 2010
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3500371
Subject(s) - carbazole , iridium , oled , electroluminescence , phosphorescence , dopant , materials science , isoquinoline , quantum efficiency , optoelectronics , doping , chemistry , photochemistry , fluorescence , optics , physics , organic chemistry , nanotechnology , layer (electronics) , catalysis
We synthesized and demonstrated electroluminescent properties of a bipolar host material such as 9‐(3‐(isoquinolin‐1‐yl)phenyl)‐9H‐carbazole (Czpiq). Particularly, by using Czpiq as a host and (bis[2‐(1,1′,2′,1″‐terphen‐3‐yl)pyridinato‐C,N]iridium (III) (acetylacetonate) (tphpy) 2 Ir(acac) as a dopant, a green electrophosphorescent OLED was fabricated, showing a maximum power efficiency of 47.13 lm/W, maximum external quantum efficiency of 12.31%, and CIE x,y coordinates of (0.34, 0.58) at 8V.