Title :
High-efficiency and color stable deep-blue organic light-emitting diodes
Author :
Park, Jung Sun ; Seo, Ji Hoon ; Koo, Ja Ryong ; Seo, Bo Min ; Lee, Kum Hee ; Park, Jeong Keun ; Yoon, Seung Soo ; Kim, Young Kwan
Author_Institution :
Dept. of Inf. Display, Hongik Univ., Seoul, South Korea
Abstract :
We have demonstrated high-efficiency and color stable deep-blue organic light emitting diodes (OLED) using 4,4´-bis (9-ethyl-3-carbazovinylene)-1,1´ -biphenyl doped in new blue host material as emitting layer. As host change of the doped blue emitter, blue OLED improved efficiency and exhibited color stability. The optimized blue OLED showed the peak external quantum efficiency of 4.72%, luminous efficiency of 5.12 cd/A at 0.08 mA/cm2, and Commission Internationale de I´Eclairage coordinates of (0.15, 0.12) at 1000cd/m2. This result showed higher efficiency of 1.6 times than control device.
Keywords :
doping; organic compounds; organic light emitting diodes; 4,4´-bis (9-ethyl-3-carbazovinylene)-1,1´ -biphenyl; Commission Internationale de I´Eclairage coordinates; blue OLED; color stable deep-blue organic light-emitting diodes; doped blue emitter; high-efficiency organic light emitting diodes; luminous efficiency; peak external quantum efficiency; Chemistry; Current density; Flat panel displays; Fluorescence; Glass; Indium tin oxide; Organic light emitting diodes; Organic materials; Stability; Sun;
Conference_Titel :
Nanoelectronics Conference (INEC), 2010 3rd International
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-3543-2
Electronic_ISBN :
978-1-4244-3544-9
DOI :
10.1109/INEC.2010.5424566
