Abstract

In this work, the novel, to the best of our knowledge, blue-cyan ${\rm Y}_2{\rm Mg}_{0.8}{\rm Sr}_{0.2}{{\rm Al}_{4}}{\rm SiO}_{12}{:}{{\rm Eu}^{2 +}}$ (${{\rm YM}_{0.8}}{{\rm S}_{0.2}}{\rm AS}{:}{{\rm Eu}^{2 +}}$) phosphors were synthesized by the solid-state method. At 150°C, the emission intensity of ${\rm Y}_2{\rm Mg}_{0.8}{\rm Sr}_{0.2}{{\rm Al}_{4}}{\rm SiO}_{12}{:}{0.005}{{\rm Eu}^{2 +}}$ can retain 96.38% of the relative intensity, which means that this phosphor shows high thermal stability. A white light-emitting diode (LED) device is fabricated by combining a 370 nm near ultraviolet LED chip and commercial phosphors (green, ${({\rm Ba},{\rm Sr})_2}{{\rm SiO}_{4}}{:}{\rm Eu}$; red, ${{\rm CaSiAlN}_{3}}{:}{\rm Eu}$). The white LED has an excellent property with the correlated color temperature ${\rm CCT} = {5236}\;{\rm K}$ and superhigh color rendering index ${\rm Ra} = {96.1}$, which indicates the potential application in white LED fields.

© 2021 Optical Society of America

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