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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 29, Number 2
BKCSDE 29(2)
February 20, 2008 

Synthesis and Characterization of Novel Red-Light-Emitting Materials with Push-Pull Structure Based on Benzo[1,2,5]thiadiazole Containing Arylamine as an Electron Donor and Cyanide as an Electron Acceptor
Jin Uk Ju, Sung Ouk Jung, Qing Hua Zhao, Yun Hi Kim*, Jong Tae Je, Soon Ki Kwon*
Benzo[1,2,5]thiadiazole, Push-pull, Inhibited intermolecular interaction, Amorphous
New efficient red emitter having short π -conjugation length and asymmetric bulky structure, 2-(7- diphenylamino-benzo[1,2,5]thiadiazole-4-ylmethylene)-malononitrile, was synthesized and characterized. Using this material as a dopant, we fabricated electroluminescence device with a structure of ITO/DNTPD/ NPD/BTZA (5 wt% in Alq3)/Alq3/LiF/Al. The device exhibited a high brightness of 761 cd/m2 at a driving voltage of 4.8 V, and current efficiency is 0.75 cd/A. The Commission International de I’Eclairage (CIE) coordinates of the EL device were found to be (0.62, 0.37) at 10 mA/cm2.
335 - 338
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