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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 2
BKCSDE 31(2)
February 20, 2010 

 
Title
Highly Efficient Blue-Light-Emitting Diodes Based on Styrylamine Derivatives End-capped with a Diphenylvinyl Group
Author
Seul Ong Kim, Kum Hee Lee, Sunwoo Kang, Jin Yong Lee, Ji Hoon Seo, Young Kwan Kim*, Seung Soo Yoon*
Keywords
OLEDs, Blue emission, Styrylamine, Diphenylvinyl group, Horner-Wadsworth-Emmons reaction
Abstract
In this paper, we reported the synthesis and electroluminescent properties of blue fluorescent styrylamine derivatives end-capped with a diphenylvinyl group. A new series of styrylamine derivatives have been synthesized via the Horner- Wadsworth-Emmons reaction. To explore electroluminescent properties of these molecules, multilayer organic lightemitting devices with the configuration of ITO/NPB/1-5 doped in MADN/Bphen/Liq/Al were fabricated. All devices exhibited blue emissions with good EL performances. Among those reported herein, the device using dopant 5 exhibited a maximum luminance of 24,000 cd/m2 at 11.0 V, a luminous efficiency of 12.5 cd/A at 20 mA/cm2, a power efficiency of 6.50 lm/W at 20 mA/cm2, and CIEx,y coordinates of (x = 0.173, y = 0.306) at 8.0 V, all of which demonstrate the superiority of these materials in blue OLEDs.
Page
389 - 396
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