Facile Synthesis of (Sr,Ca)2Si5N8:Eu2+-Based Red-Emitting Phosphor for Solid-State Lighting
作者： Takayuki Suehiro , Rong-Jun Xie , Naoto Hirosaki
DOI: 10.1021/IE400741U
关键词: Wavelength 、 Phosphor 、 Diode 、 Solid-state lighting 、 Nitride 、 Materials science 、 Analytical chemistry 、 Color rendering index 、 Quantum efficiency 、 Photoluminescence 、 Optics
摘要: A new facile synthetic route to produce a nitride-based red-emitting phosphor has been established. The (Sr,Ca)2Si5N8:Eu2+-based multicomponent was successfully synthesized from the stable SrCO3–CaCO3–Eu2O3–Si3N4 system by simple one-step heating at 1600 °C for 4 h in an unpressurized N2 atmosphere. red broadband emitting exhibited peak wavelength as long 661 nm with practically high external quantum efficiency of 60% under excitation 450 nm, while coexisting secondary phase inactive blue-light excitation, showing no detrimental effects on photoluminescent properties. enhanced emission compared unmodified Sr2Si5N8:Eu2+ enables further improvement color rendering properties white light-emitting diodes solid-state lighting applications.
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