<abstract xmlns="http://www.w3.org/1999/xhtml">SiO2 particles and red-emitting CaMgSi2O6:Eu2+,Mn2+ phosphor have been added into a yellow phosphor compound YAG:Ce3+ to enhance the optical efficiency of white light LEDs whose average correlated color temperature (CCT) is in the range of 5600 K ÷ 8500 K. It was observed that altering CaMgSi2O6:Eu2+,Mn2+ concentration from 2 % to 30 % while maintaining 5 % of the SiO2 strongly influenced the color rendering index (CRI), color quality scale (CQS), and lumen efficiency of the compound. Besides, through the application of Monte Carlo simulation and Mie-scattering theory, it was possible to improve the optical properties by CaMgSi2O6:Eu2+,Mn2+ and SiO2 addition. The results provided a practical approach to achieve higher luminous efficiency and better color uniformity in remote-phosphor white LEDs (RP-WLEDs).</abstract>

SiO2 particles and red-emitting CaMgSi2O6:Eu2+,Mn2+ phosphor have been added into a yellow phosphor compound YAG:Ce3+ to enhance the optical efficiency of white light LEDs whose average correlated color temperature (CCT) is in the range of 5600 K ÷ 8500 K. It was observed that altering CaMgSi2O6:Eu2+,Mn2+ concentration from 2 % to 30 % while maintaining 5 % of the SiO2 strongly influenced the color rendering index (CRI), color quality scale (CQS), and lumen efficiency of the compound. Besides, through the application of Monte Carlo simulation and Mie-scattering theory, it was possible to improve the optical properties by CaMgSi2O6:Eu2+,Mn2+ and SiO2 addition. The results provided a practical approach to achieve higher luminous efficiency and better color uniformity in remote-phosphor white LEDs (RP-WLEDs).

Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi2O6:Eu2+,Mn2+

National Kaohsiung University of Sciences and Technology

Faculty of Electrical and Electronics Engineering

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSiO:Eu,Mn

SiO2 particles and red-emitting CaMgSi2O6:Eu2+,Mn2+ phosphor have been added into a yellow phosphor compound YAG:Ce3+ to enhance the optical efficiency of...

Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi₂O₆:Eu²⁺,Mn²⁺

Published Online: Dec 12, 2020

Page range: 409 - 415

Received: Jun 13, 2018

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0045

Keywords
remote-phosphor white LEDs, SiO, CaMgSiO:Eu, Mn, color quality scale, Mie-scattering theory

© 2020 Guo-Feng Luo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi2O6:Eu2+,Mn2+

Published Online: Dec 12, 2020

Page range: 409 - 415

Received: Jun 13, 2018

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0045

Keywordsremote-phosphor white LEDs, SiO, CaMgSiO:Eu, Mn, color quality scale, Mie-scattering theory

© 2020 Guo-Feng Luo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi₂O₆:Eu²⁺,Mn²⁺

Keywords
remote-phosphor white LEDs, SiO, CaMgSiO:Eu, Mn, color quality scale, Mie-scattering theory