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Enhanced Light Extraction of Flip-Chip Mini-LEDs with Prism-Structured Sidewall
- Source :
- Nanomaterials, Volume 9, Issue 3, Nanomaterials, Vol 9, Iss 3, p 319 (2019)
- Publication Year :
- 2019
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2019.
-
Abstract
- Current solutions for improving the light extraction efficiency of flip-chip light-emitting diodes (LEDs) mainly focus on relieving the total internal reflection at sapphire/air interface, but such methods hardly affect the epilayer mode photons. We demonstrated that the prism-structured sidewall based on tetramethylammonium hydroxide (TMAH) etching is a cost-effective solution for promoting light extraction efficiency of flip-chip mini-LEDs. The anisotropic TMAH etching created hierarchical prism structure on sidewall of mini-LEDs for coupling out photons into air without deteriorating the electrical property. Prism-structured sidewall effectively improved light output power of mini-LEDs by 10.3%, owing to the scattering out of waveguided light trapped in the gallium nitride (GaN) epilayer.
- Subjects :
- Materials science
General Chemical Engineering
Gallium nitride
02 engineering and technology
prism-structured sidewall
waveguide photons
light extraction
01 natural sciences
law.invention
010309 optics
lcsh:Chemistry
chemistry.chemical_compound
Etching (microfabrication)
law
0103 physical sciences
General Materials Science
Diode
Total internal reflection
business.industry
021001 nanoscience & nanotechnology
chemistry
lcsh:QD1-999
flip-chip mini-LED
Sapphire
Optoelectronics
Prism
0210 nano-technology
business
Flip chip
Light-emitting diode
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Database :
- OpenAIRE
- Journal :
- Nanomaterials
- Accession number :
- edsair.doi.dedup.....177e38bd1082f169bec510e4a436f8a9
- Full Text :
- https://doi.org/10.3390/nano9030319