Abstract
We present an application of the red Y2O3:Eu3+ dopant phosphor compound for reaching the color rendering index as high as 86. The Multi-Chip White LED lamps (MCW-LEDs) with high Correlated Color Temperatures (CCTs) including 7000 K and 8500 K are employed in this study. Besides, the impacts of the Y2O3:Eu3+ phosphor on the attenuation of light through phosphor layers of the various packages is also demonstrated based on the Beer-Lambert law. Simulation results provide important conclusion for selecting and developing the phosphor materials in MCW-LEDs manufacturing.
Highlights
There are many benefits of MCW-LEDs to consumers such as high brightness, low power consumption, long lifetime, fast response, climate impact resistance [1]
We introduce the impacts of Y2O3:Eu3+ phosphor particles in multi-chip white light LEDs with conformal phosphor or in-cup phosphor packages to enhance color rendering ability
Both the Color Rendering Index (CRI) and the lumen output of MCW-LEDs depend on the red Y2O3:Eu3+ phosphor concentration
Summary
There are many benefits of MCW-LEDs to consumers such as high brightness, low power consumption, long lifetime, fast response, climate impact resistance [1]. Luminous output and Correlated Color Temperature (CCT) uniformity are two main factors of white LED lamps. The lumen output of MCW-LEDs can be enhanced significantly after adding the green Ce0.67 Tb0.33 MgAl11 O19:Ce, Tb phosphor to MCW-LEDs [2]. We introduce the impacts of Y2O3:Eu3+ phosphor particles in multi-chip white light LEDs with conformal phosphor or in-cup phosphor packages to enhance color rendering ability. It has been found that the participation of Y2O3:Eu3+ phosphor particles can dominate the red-light emitting event in pc-WLEDs, so that the LED light distribution can be free from the dispersion incurred by LED packages to yield higher Color Rendering Index. We have investigated the effects of Y2O3:Eu3+ phosphor particles on the color rendering ability of MCW-LEDs according to the simc 2016 ADVANCES IN ELECTRICAL AND ELECTRONIC ENGINEERING. The proposed method of doping certain amounts of Y2O3:Eu3+ in the LED packages can improve their CRI significantly
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