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 first and second conductivity type semiconductor clad layers and an active layer interposed therebetween,
wherein the active layer is a semiconductor nanowire layer obtained by preparing a layer of a mixture composed of a semiconductor nanowire and a transparent conductive polymer and curing the transparent conductive polymer, the semiconductor nanowire contacts the first and second conductivity type semiconductor clad layers and comprises a nitride semiconductor having a composition expressed by AI x Ga y In 1-x-y N, where 0<x<1 and 0<y<1,
wherein the semiconductor nanowire occupies 70 to 95 volume % of the mixture.
2. The nanowire light emitting device according to claim 1 , wherein the semiconductor nanowire of the active layer comprises 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 nanowire has a length greater than 1.5 times or more with respect to a thickness of any of the first and second conductivity type clad layers and the active layer including the semiconductor nanowire.
5. The nanowire light emitting device according to claim 1 , wherein the transparent conductive polymer comprises one selected from a group consisting of polypyrrole, polyaniline, poly (3,4-ethylenedioxythiophene), polyacetylene, poly (p-phenylene), polythiophene, poly (p-phenylenevinylene) and poly (thienylen vinylene).
6. The nanowire light emitting device of claim 1 , further comprising:
a first electrode connected to the first conductivity type clad layer; and
a second electrode connected to the second conductivity type clad layer.
7. A method for manufacturing a nanowire light emitting device, which includes first and second conductivity type semiconductor clad layers and an active layer interposed therebetween, wherein the active layer is formed by steps of:
preparing a layer of a transparent conductive polymer having a semiconductor nanowire dispersed therein, and
curing the transparent conductive polymer, the semiconductor nanowire contacting the first and second conductivity type semiconductor clad layers and comprising a nitride semiconductor having a composition expressed by AI x Ga y In 1-x-y N, where 0<x<1 and 0<y<1,
wherein the semiconductor nanowire is dispersed in the transparent conductive polymer at 70 to 95 volume % of a mixture of the transparent conductive polymer and the semiconductor nanowire.
8. The method according to claim 7 , wherein the semiconductor nanowire of the active layer comprises at least two types of semiconductor materials emitting light at different wavelengths.
9. The method according to claim 8 , wherein the wavelengths of the semiconductor nanowire materials are combined to generate white light.
10. The method according to claim 7 , wherein the semiconductor nanowire has a length greater than 1.5 or more with respect to a thickness of any of the first and second conductivity type clad layers and the active layer including the semiconductor nanowire.
11. The method according to claim 7 , wherein the transparent conductive polymer comprises one selected from a group consisting of polypyrrole, polyaniline, poly(3,4-ethylenedioxythiophene), polyacetylene, poly(p-phenylene), polythiophene, poly(p-phenylenevinylene) and poly(thienylen vinylene).