Organic light-emitting diodes having exclusive near-infrared electrophosphorescence
Near-infrared (NIR) emission is demonstrated from phosphorescent organic light-emitting
diodes containing blends of polymeric host and heavy metal complex, iridium (III) bis (1-
pyrenyl-isoquinolinato-N, C′) acetylacetonate. The devices exhibit exclusive NIR
emission with a peak value at 720 nm. Forward light output exceeds 100 μ W∕ cm 2,
and the external quantum efficiency is nearly 0.1%. These values are shown to increase
upon using a hole blocking layer in the device architecture.
diodes containing blends of polymeric host and heavy metal complex, iridium (III) bis (1-
pyrenyl-isoquinolinato-N, C′) acetylacetonate. The devices exhibit exclusive NIR
emission with a peak value at 720 nm. Forward light output exceeds 100 μ W∕ cm 2,
and the external quantum efficiency is nearly 0.1%. These values are shown to increase
upon using a hole blocking layer in the device architecture.
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