紫光激發(fā)類太陽光LED用 Eu2+ 激活硅酸鹽黃色熒光粉合成及發(fā)光性能
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關鍵詞：熵增；高效；黃色熒光粉；類太陽光LED；健康照明中圖分類號：0482.31 文獻標識碼：ADOI：10.37188/CJL.20250012 CSTR：32170.14.CJL.20250012
Abstract：Sunlike LEDs，with their advantages of excellent spectral continuity，high color rendering index （Ra）， highcolorfidelity （Rf）? ，andhighcolorsaturation （Rg）， havebecome aninevitable trend in thefutureof healthylightingdevelopment.Efficientand stable multi-color phosphorsarethe keymaterialsforachieving sunlike/full-spectrum LEDs.In this paper，a novel violet-excited yellow phosphor， ?（Ba0.6Ca0.7Sr0.7）02-SiO2?：Eu2+ was synthesized using a high-temperature solid-state method basedon an entropy-increasing strategy.This phosphor，under 371nmultraviolet excitation，emits yellow lightwithaspectralrangeof 420-80Onmandacentralwavelengthof 56O nm，achieving an external quantum efficiency of 75% .Notably，under 4OO nm violet excitation，theluminous intensityof the phosphor can reach 88.2% of itsmaximum emission at the optimal excitation wavelength，achieving an external quantum efficiency of 53. 0% ，demonstrating good adaptability to violet chips.Finally，a sunlike LED was fabricated by combining the ?（Ba0.6Ca0.7Sr0.7）02-SiO2?：Eu2+ yellw phosphor with commercial red，blue，and cyan phosphors and coupling with a 410nm violetLED chip.The resultingLED exhibited high color rendering index（ Ra=96 ），high color saturation index （ Rg=100 ），and high color fidelity index （ Rf=95. 1 ）. The entropy-increasing strategy proposed in this studyalso provides anew approach for the development of novel high-efficiencyand stable phosphor systems.
Key Words：entropy-increasing；high efficiency;yellow phosphor;sunlike LED;healthy lighting
1引言
類太陽光LED的光譜分布接近自然陽光，具備較好的光譜連續(xù)性、高顯色指數(shù) （Ra） 、高色保真指數(shù) （Rf） 和高色飽和度 Ξ（Rg） 等優(yōu)點，是未來健康照明發(fā)展的必然趨勢。（剩余15667字）