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Green phosphorescent light-emitting diodes from polymer doped with iridium complex
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/content/aip/journal/apl/92/19/10.1063/1.2927357
2008-05-15
2014-09-02

Abstract

We demonstrate efficient organic light-emitting diodes by using a phosphorescent host/guest system consisting of a recently developed green electrophosphorescent molecule, bis[(4,6-difluorophenyl)-8-methylpyridinato- )iridium pyrazinate , as the guest and a blend of poly( -vinylcarbazole) (PVK) with 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as the host and different cathode structures such as a triple layer of and a bilayer of . The electrophosphorescence emission was characteristic of , with its maximum at with Commission International de L’Eclairage coordinates of (0.43, 0.53). The device with of in PVK/PBD with a CsF bilayer exhibited an external quantum efficiency of 6.2%, luminescence efficiency of , luminous power efficiency of , and maximum brightness of .

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Scitation: Green phosphorescent light-emitting diodes from polymer doped with iridium complex
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/19/10.1063/1.2927357
10.1063/1.2927357
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