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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 10
BKCSDE 31(10)
October 20, 2010 

Red Fluorescent Organic Light-Emitting Diodes Using Modified Pyran-containing DCJTB Derivatives
Kum Hee Lee, Sung Min Kim, Jeong Yeon Kim, Young Kwan Kim, Seung Soo Yoon*
OLED, Red fluorescence, DCJTB derivatives, Pyran
Two red fluorescent DCJTB derivatives (Red 1 and 2) based on modified pyrans were synthesized and their electroluminescent properties were investigated. Multilayered OLEDs were fabricated with the device structure of ITO/ NPB (40 nm)/Red 1, 2 or DCJTB (0.5 or 1%): Alq3 (20 nm)/Alq3 (40 nm)/Liq (2 nm)/Al. All devices exhibited efficient red emissions. In particular, a device containing emitter Red 2 as a dopant in the emitting layer, the maximum luminance was 8737 cd/m2 at 12.0 V, the luminous and power efficiencies were 2.31 cd/A and 1.25 lm/W at 20 mA/cm2, respectively. The peak wavelength of the electroluminescence was 638 nm with the CIE (x,y) coordinates of (0.63, 0.36) at 7.0 V.
2884 - 2888
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