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Journal Article
Multi-Color Broadband Visible Light Source Via GaN Hexagonal Annular Structure
- Authors
- Young-Ho Ko, Jie Song, Benjamin Leung, Jung Han, Yong-Hoon Cho
- Issue Date
- 2014-07
- Citation
- Scientific Reports, v.4, pp.1-5
- ISSN
- 2045-2322
- Publisher
- Nature Publishing Group
- Language
- English
- Type
- Journal Article
- Abstract
- Multi-color and broadband visible emission was realized thorough the hexagonal annular structure of GaN. The annular structure fabricated by selective-area growth emitted purple, blue and green color-emission from the multi-facets. The hexagonal annular structure provided various sidewalls of {101} and {112} semi-polar facets, and (0001) polar facet. From the cathodoluminescence study, the (0001) plane had the longest wavelength of 525μnm, and the {101} facet of 440μnm peak wavelength had longer wavelength emission than the {112} of 412μnm peak wavelength. The origin of longer wavelength emission of {101} was mostly due to high In-composition, as well as slightly larger well thickness, which means that {101} facet has higher In-incorporation efficiency. Various In-composition of each facet provided multi-color and broadband emission with the international commission on illumination (CIE) of (0.22, 0.45) and high emission efficiency. The hexagonal annular structure becomes building blocks for highly efficient broadband visible lighting sources.
- KSP Keywords
- Emission efficiency, Green color, Highly efficient, Light source, Multi-color, Peak wavelength, Polar facets, Selective area growth, Visible Light, broadband emission, building block
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
