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Improvement of electron injection in inverted bottom-emission blue phosphorescent organic light emitting diodes using zinc oxide nanoparticles
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/content/aip/journal/apl/96/15/10.1063/1.3400224
2010-04-16
2014-11-28

Abstract

We fabricated highly efficient iridium(III) bis[(4,6-di-fluorophenyl)-pyridinato-] picolinate doped inverted bottom-emission blue phosphorescent organic light-emitting diodes, with an electron injection layer of zinc oxide (ZnO) nanoparticles (NPs). The ZnO NPs layer lowers the turn-on voltage by about 4 V and significantly enhances the efficiency. The device with ZnO NPs shows peak efficiencies of 16.5 cd/A and 8.2%, about three times higher than those of the device without ZnO NPs. Since the ZnO NPs layer has a wide band gap, good electron transporting properties and low work function, it can be utilized as an effective electron injection layer with good transparency.

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Scitation: Improvement of electron injection in inverted bottom-emission blue phosphorescent organic light emitting diodes using zinc oxide nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/15/10.1063/1.3400224
10.1063/1.3400224
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