Enhanced luminance of white organic light-emitting diode with yellow nanophosphors-embedded blue polymer emitting layer

White organic light-emitting device was achieved through an incorporation of yellow YAG nanophosphors into blue polyfluorene emitting layer: electrode/YAG@polyfluorene/hole-transport/injection layers/ITO glass. The brightness of the proposed device (230 cd/m 2 at 30 V) was enhanced by a factor of ab...

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Bibliographic Details
Published in:Journal of luminescence 2010-08, Vol.130 (8), p.1415-1418
Main Authors: Park, J.H., Jeong, Y.S., Jang, N.W., Kim, J.S.
Format: Article
Language:English
Subjects:
Application fields
Applied sciences
Devices
Electronics
Emission
Emittance
Exact sciences and technology
Indium tin oxide
Luminance
Luminescence
Nanocomposites
Nanomaterials
Nanostructure
Optoelectronic devices
Phosphors
Polyfluorene
Polymer industry, paints, wood
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Technology of polymers
White organic light-emitting device
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Summary:White organic light-emitting device was achieved through an incorporation of yellow YAG nanophosphors into blue polyfluorene emitting layer: electrode/YAG@polyfluorene/hole-transport/injection layers/ITO glass. The brightness of the proposed device (230 cd/m 2 at 30 V) was enhanced by a factor of about two in comparison with that of phosphor-free reference device. It is attributed to the increased local electric field caused by bumps of nanophophors on the emitting layer. With increase of voltage, the blue–green emission decreased whereas the yellow emission increased. It is due to the effective energy transfer from the blue–green to the yellow bands.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2010.03.003