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http://dx.doi.org/10.4313/JKEM.2007.20.9.802

Electrical and Optical Properties of Red Phosphorescent Top Emission OLEDs with Transparent Metal Cathodes  

Kim, So-Youn (순천향대학교 신소재공학과)
Ha, Mi-Young (순천향대학교 신소재공학과)
Moon, Dae-Gyu (순천향대학교 신소재공학과)
Lee, Chan-Jae (전자부품연구원 디스플레이센터)
Han, Jeong-In (전자부품연구원 디스플레이센터)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.20, no.9, 2007 , pp. 802-807 More about this Journal
Abstract
We have developed red phosphorescent top emission organic light-emitting diodes with transparent metal cathodes deposited by using thermal evaporation technique. Phosphorescent guest molecule, BtpIr(acac), was doped in host CBP for the red phosphorescent emission, Ca/Ag, Ba/Ag, and Mg/Ag double layers were used as cathode materials of top emission devices, which were composed of glass/Ni/2TNATA(15 nm)/${\alpha}$-NPD(35 nm)/CBP:BtpIr(acac)(40 nm, 10%)/BCP(5 nm)/$Alq_3$(5 nm)/cathodes. The optical transparencies of these metal cathodes strongly depend on underlying Ca, Ba, and Mg layers. These layers also strongly affect the electrical conduction and emission properties of the red phosphorescent top emission devices.
Keywords
Organic light emitting diode; Top emission; Transparent cathode; Red; Phosphorescence;
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Times Cited By KSCI : 1  (Citation Analysis)
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