The effect green YF3:ER3+,YB3+ phosphor on luminous flux and color quality of multi-chip white light-emitting diodes

Abstract

The purpose of this paper is to demonstrate the advantages of the green phosphor YF₃:Er³⁺,Yb³⁺ combined with multi-chip package to the enhancement of lighting efficiency of modern WLEDs. In an effort to improve the quality of WLEDs and create a new generation of lighting device, green phosphor YF₃:Er³⁺,Yb³⁺ is added into the phosphor compounding of the WLED package to improve the color quality and lighting capacity. Through experiments, WLEDs with YF₃:Er³⁺,Yb³⁺ green phosphor has shown improved results in lighting performance specifically in color homogeneity and light output of WLEDs in the ACCT range from 5600-7000 K. However, the color quality scale (CQS) declines gradually. Therefore, if the appropriate concentration and size of YF₃:Er³⁺,Yb³⁺ are determined, the performance of MCW-LEDs will be enhanced and become more stable.