Superior color rendering with a phosphor-converted blue-cyan monolithic light-emitting diode
Autor: | Alexei V. Sakharov, Andrey F. Tsatsulnikov, Thomas J. Slight, Sergey Yu. Karpov, Amit Yadav, I. E. Titkov, Andrei Gorodetsky, Edik U. Rafailov |
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Rok vydání: | 2016 |
Předmět: |
010302 applied physics
Materials science business.industry Cyan Phosphor 02 engineering and technology Color temperature 021001 nanoscience & nanotechnology Condensed Matter Physics Chip 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Color rendering index Optics Light source law 0103 physical sciences Optoelectronics Emission spectrum 0210 nano-technology business Light-emitting diode |
Zdroj: | Laser & Photonics Reviews. 10:1031-1038 |
ISSN: | 1863-8880 |
Popis: | The future generation of modern illumination should not only be cheap and highly efficient, but also demonstrate high quality of light, light which allows better color differentiation and fidelity. Here we are presenting a novel approach to create a white solid-state light source providing ultimate color rendition necessary for a number of applications. The proposed semi-hybrid device combines a monolithic blue-cyan light emitting diode (MBC LED) with a green-red phosphor mixture. It has shown a superior color rendering index (CRI), 98.6, at correlated color temperature of around 3400 K. The MBC LED epi-structure did not suffer from the efficiency reduction typical for monolithic multi-color emitters and was implemented in the two most popular chip designs: “epi-up” and “flip-chip”. Redistribution of the blue and cyan band amplitudes in the white-light emission spectrum, using the operating current, is found to be an effective tool for fine tuning the color characteristics. (Figure presented.). |
Databáze: | OpenAIRE |
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