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http://dx.doi.org/10.5012/bkcs.2010.31.02.389

Highly Efficient Blue-Light-Emitting Diodes Based on Styrylamine Derivatives End-capped with a Diphenylvinyl Group  

Kim, Seul-Ong (Department of Chemistry, Sungkyunkwan University)
Lee, Kum-Hee (Department of Chemistry, Sungkyunkwan University)
Kang, Sun-Woo (Department of Chemistry, Sungkyunkwan University)
Lee, Jin-Yong (Department of Chemistry, Sungkyunkwan University)
Seo, Ji-Hoon (Department of Information Display, Hongik University)
Kim, Young-Kwan (Department of Information Display, Hongik University)
Yoon, Seung-Soo (Department of Chemistry, Sungkyunkwan University)
Publication Information
Bulletin of the Korean Chemical Society / v.31, no.2, 2010 , pp. 389-396 More about this Journal
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 lighte-mitting 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 $24,000\;cd/m^2$ at 11.0 V, a luminous efficiency of 12.5 cd/A at $20\;mA/cm^2$, a power efficiency of 6.50 lm/W at $20\;mA/cm^2$, and $CIE_{x,y}$ coordinates of (x = 0.173, y = 0.306) at 8.0 V, all of which demonstrate the superiority of these materials in blue OLEDs.
Keywords
OLEDs; Blue emission; Styrylamine; Diphenylvinyl group; Horner-Wadsworth-Emmons reaction;
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