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Characterization of Hybrid Dual Emitting Layers in Blue Organic Light-Emitting Diodes by Controlling the Fluorescent Doping Concentration

Published online by Cambridge University Press:  15 May 2013

Bo Mi Lee
Affiliation:
Department of Engineering Physics and Centre for Emerging Device Technologies, McMaster University, Hamilton ON, Canada
Nam Ho Kim
Affiliation:
Department of Green Energy & Semiconductor Engineering, Hoseo University, Asan, Korea
Ju-An Yoon
Affiliation:
Department of Green Energy & Semiconductor Engineering, Hoseo University, Asan, Korea
Woo Young Kim
Affiliation:
Department of Engineering Physics and Centre for Emerging Device Technologies, McMaster University, Hamilton ON, Canada Department of Green Energy & Semiconductor Engineering, Hoseo University, Asan, Korea
Peter Mascher
Affiliation:
Department of Engineering Physics and Centre for Emerging Device Technologies, McMaster University, Hamilton ON, Canada
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Abstract

In this study, we demonstrate blue organic light-emitting diodes (OLEDs) with a dual emitting layer (EML) configuration consisting of fluorescent and phosphorescent emitting materials. We investigated the influence of dopants on the electrical and optical characteristics of devices when controlling the fluorescent dopant concentration. The current density and luminance of device B doped with 12wt% BCzVBi was 141.6 mA/cm2 and 6582 cd/m2 at 10V, respectively. In addition, a maximum luminous efficiency of 8.11 cd/A, was achieved from device B. The corresponding Commission Internationale de l’E´ clairage (CIExy) coordinates of device D doped with 5wt% BCzVBi were (0.143, 0.255) at 6V.

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Copyright
Copyright © Materials Research Society 2013 

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Characterization of Hybrid Dual Emitting Layers in Blue Organic Light-Emitting Diodes by Controlling the Fluorescent Doping Concentration
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Characterization of Hybrid Dual Emitting Layers in Blue Organic Light-Emitting Diodes by Controlling the Fluorescent Doping Concentration
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Characterization of Hybrid Dual Emitting Layers in Blue Organic Light-Emitting Diodes by Controlling the Fluorescent Doping Concentration
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