Nanowire light emitting device and method of manufacturing the same
View Patent ↗The invention provides a nanowire light emitting device and a manufacturing method thereof. In the light emitting device, first and second conductivity type clad layers are formed and an active layer is interposed therebetween. At least one of the first and second conductivity type clad layers and the active layer is a semiconductor nanowire layer obtained by preparing a layer of a mixture composed of a semiconductor nanowire and an organic binder and removing the organic binder therefrom.
1. A nanowire light emitting device, comprising:
a first conductivity type clad layer and a second conductivity type clad layer; and
an active layer interposed between the first conductivity clad layer and second conductivity type clad layer, wherein:
at least one of the first and second conductivity type clad layers is a semiconductor nanowire layer that includes semiconductor nanowires and a conductive polymer,
the active layer is a semiconductor nanowire layer that includes semiconductor nanowires and a conductive polymer, and
the conductive polymer of the active layer is transparent while the conductive polymer of the at least one of the first and second conductivity type clad layers is not transparent.
2. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowires of the active layer comprise at least two types of semiconductor materials emitting light at different wavelengths.
3. The nanowire light emitting device according to claim 2 , wherein the wavelengths of the semiconductor nanowire materials are combined to generate white light.
4. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowires comprise a nitride semiconductor having a composition expressed by Al x Ga y In 1-x-y N, where 0≦x≦1 and 0≦y≦1.
5. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowires are 70 to 95 volume % of the mixture.
6. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowires have a length greater than 1.5 times or more with respect to a thickness of the semiconductor nanowire layer.
7. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowire layer includes a pore space between the semiconductor nanowires.
8. A nanowire light emitting device, comprising:
a first conductivity type clad layer;
a second conductivity type clad layer; and
an active layer interposed between the first conductivity type clad layer and the second conductivity type clad layer, wherein:
the second conductivity type clad layer includes a semiconductor nanowire and a conductive polymer,
the first conductivity type clad layer is free of semiconductor nanowires,
the active layer includes a semiconductor nanowire and a conductive polymer, and
the conductive polymer of the active layer is transparent while the conductive polymer of the second conductivity type clad layer is not transparent.