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Characterization of Fluoride Phosphors for Diode Pumped Solid-State Lighting Applications 预览
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作者 Bommareddi Rami Reddy Kristopher Liggins Vernessa M. Edwards 《光学与光子学期刊(英文)》 2018年第8期288-300,共13页
Phosphor coated diodes are critical to the lighting industry. Rare-earth doped fluoride phosphors are characterized in this work. Spectroscopy and lifetime measurements of CaF2: Dy3+, LaF3: Eu3+ and Tb3+-doped LaF3 an... Phosphor coated diodes are critical to the lighting industry. Rare-earth doped fluoride phosphors are characterized in this work. Spectroscopy and lifetime measurements of CaF2: Dy3+, LaF3: Eu3+ and Tb3+-doped LaF3 and CaF2 crystals were performed by irradiating the samples with 405 and 375 nm diode lasers. Chromaticity diagrams are developed from spectral measurements. Dy3+-doped CaF2 revealed bright white light emission having peaks at 492, 570 and 654 nm. The measured color coordinates are x = 0.322 and y = 0.340 for Dy3+-doped CaF2 and these values are close to those of sunlight and the coordinated color temperature is 6147 K, under 405 m laser excitation. Eu3+-doped LaF3 revealed twenty emission peaks in the visible wavelength region. The color coordinates measured for LaF3: Eu3+ are x = 0.283 and y = 0.293 under 405 nm diode laser excitation and the color temperature is 9557 K. Eu3+-doped LaF3 provides cool white-light, under 405 nm diode laser excitation. Tb3+-doped fluoride crystals revealed bright white light under low power diode laser excitation. The measured color coordinates for Tb3+-doped CaF2 are x = 0.329 and y = 0.558 and the color temperature is 7713 K. The color coordinates for LaF3: Tb3+ are x = 0.342 and y = 0.365 and the coordinated color temperature is 5370 K. These values are close to those of sunlight. 展开更多
关键词 Rare-Earth Spectroscopy WHITE-LIGHT Emission COLOR Coordinates Coordinated COLOR Temperature FLUORIDE Materials Laser Induced Fluorescence EUROPIUM TERBIUM DYSPROSIUM Ions
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镝离子掺杂铝锗酸盐玻璃的高效可见荧光发射 预览
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作者 杨殿来 周岩 +6 位作者 刘博 张莹莹 时卓 赵明 赵辉 吴学坤 王娇 《合成材料老化与应用》 2016年第1期73-75,85共4页
制备了高质量镝离子掺杂铝锗酸盐玻璃。对玻璃的吸收、荧光光谱和激发光谱展开了测试与分析。紫外光激发下,Dy^3+离子掺杂铝锗酸盐玻璃放出明亮的黄白色光,发射光谱由峰值为479nm蓝光和574nm绿光发射峰组成。激发光谱表明:氩离子激... 制备了高质量镝离子掺杂铝锗酸盐玻璃。对玻璃的吸收、荧光光谱和激发光谱展开了测试与分析。紫外光激发下,Dy^3+离子掺杂铝锗酸盐玻璃放出明亮的黄白色光,发射光谱由峰值为479nm蓝光和574nm绿光发射峰组成。激发光谱表明:氩离子激光器和紫外、蓝色激光二极管及发光二极管是Dy^3+掺杂铝锗酸盐玻璃有效的泵浦光源。 展开更多
关键词 鏑离子 铝锗酸盐玻璃 荧光光谱 激发光谱
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