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Journal of Photonics for Energy

Polymer light-emitting diodes with inorganic nanocomposite interlayers for efficiency enhancement
Author(s): Boris Riedel; Julian Hauss; Yuxin Shen; Markus Aichholz; Uli Lemmer; Martina Gerken
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Paper Abstract

We report on polymer light-emitting diodes (PLEDs) with embedded SiO2 nanoparticle interlayers. We fabricated PLEDs with a rather thick (180 nm) SiO2 interlayer between the hole injection layer and a 50-nm thin emission layer. We also made devices, where the interlayer was embedded inside the emission layer. The devices were characterized by electroluminescence and photoluminescence measurements and compared to the respective reference devices. We achieved an enhancement factor of 1.74 for the luminous efficacy and 2.13 for the current efficiency at 4000 cd/m2 for the PLED with the interlayer between the hole injection layer and the emission layer compared to the reference device. For PLEDs with the interlayer between the two emission layers, we obtained an enhancement factor of 1.68 for the luminous efficacy and 1.45 for the current efficiency at 4000 cd/m2 compared to the corresponding reference device. This surprising enhancement can be explained by a superposition of increased internal quantum efficiency and an increase in the extraction efficiency.

Paper Details

Date Published: 1 January 2011
PDF: 7 pages
J. Photon. Energy. 1(1) 011018 doi: 10.1117/1.3569102
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Boris Riedel, Karlsruher Institut für Technologie (Germany)
Julian Hauss, Karlsruher Institut für Technologie (Germany)
Yuxin Shen, Karlsruher Institut für Technologie (Germany)
Markus Aichholz, Karlsruher Institut für Technologie (Germany)
Uli Lemmer, Karlsruher Institut für Technologie (Germany)
Martina Gerken, Christian-Albrechts-Univ. zu Kiel (Germany)


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