Polarization-matched LED Shows 18% Efficiency Increase
Mar 27, 2009
Using Gallium Indium Nitride/Gallium Indium Nitride (GaInN/GaInN) layer instead of conventional Gallium Indium Nitride/Gallium Nitride (GaInN/GaN), researches from Rensselaer Polytechnic Institute developed a new polarization-matched LED, which exhibits an 18% increase in light output.
The study, conducted in collaboration with Samsung Electro-Mechanics, discovered that mismatched polarization of material in LED chip causes "efficiency droop", a well-known phenomenon that provokes LEDs to loose efficiency, when current density increases.
Reference: Applied Physics Letters
Author: Yaroslav Oleksenko
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