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上海应用技术大学 材料科学与工程学院, 上海 201418
[ "田玉珂(2000-),女,河南商丘人,硕士研究生,2022年于常熟理工学院获得学士学位,主要从事发光材料及器件方面的研究。" ]
[ "房永征(1970-),男,山东滨州人,博士,教授,博士生导师,2007年于中国科学院上海光学精密机械研究所获得博士学位,主要从事光电子功能材料的研究。" ]
收稿:2025-01-14,
修回:2025-02-11,
纸质出版:2025-06-25
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田玉珂,吴江华,覃志宇等.紫光激发类太阳光LED用Eu2+激活硅酸盐黄色荧光粉合成及发光性能[J].发光学报,2025,46(06):1057-1066.
TIAN Yuke,WU Jianghua,QIN Zhiyu,et al.Synthesis and Luminescence Properties of Eu2+ Activated Silicate Yellow Phosphor for Violet-excited Sunlike LEDs[J].Chinese Journal of Luminescence,2025,46(06):1057-1066.
田玉珂,吴江华,覃志宇等.紫光激发类太阳光LED用Eu2+激活硅酸盐黄色荧光粉合成及发光性能[J].发光学报,2025,46(06):1057-1066. DOI: 10.37188/CJL.20250012. CSTR: 32170.14.CJL.20250012.
TIAN Yuke,WU Jianghua,QIN Zhiyu,et al.Synthesis and Luminescence Properties of Eu2+ Activated Silicate Yellow Phosphor for Violet-excited Sunlike LEDs[J].Chinese Journal of Luminescence,2025,46(06):1057-1066. DOI: 10.37188/CJL.20250012. CSTR: 32170.14.CJL.20250012.
类太阳光LED具有光谱连续性好、高显色指数(
R
a
)、高色保真指数(
R
f
)和高色饱和度(
R
g
)等优点,是未来健康照明发展的必然趋势。高效稳定的荧光粉是实现类太阳光/全光谱LED的核心材料。本文基于熵增策略,通过高温固相法合成了紫光激发[(Ba
0.6
Ca
0.7
Sr
0.7
)O
2
-SiO
2
]∶Eu
2+
黄色荧光粉。该荧光粉在371 nm紫外光激发下,可以发射出光谱范围涵盖420~800 nm、中心波长位于560 nm的黄光,外量子效率达75%。在400 nm紫光激发下,发光强度可以达到其最优激发波长下的88.2%,外量子效率达53.3%,可有效适配紫光芯片。最后,将[(Ba
0.6
Ca
0.7
Sr
0.7
)O
2
-SiO
2
]∶Eu
2+
黄色荧光粉和商用蓝色、青色和红色荧光粉混合后与410 nm紫光LED芯片相结合,制备出了高显色指数(
R
a
= 96)、高色饱和指数(
R
g
= 100)和高色保真指数(
R
f
= 95.1)的类太阳光LED。
Sunlike LEDs, with their advantages of excellent spectral continuity, high color rendering index
(
R
a
), high color fidelity (
R
f
), and high color saturation (
R
g
), have become an inevitable trend in the future of healthy lighting development. Efficient and stable multi-color phosphors are the key materials for achieving sunlike/full-spectrum LEDs. In this paper, a novel violet-excited yellow phosphor, [(Ba
0.6
Ca
0.7
Sr
0.7
)O
2
-SiO
2
]∶Eu
2+
was synthesized using a high-temperature solid-state method based on an entropy-increasing strategy. This phosphor, under 371 nm ultraviolet excitation, emits yellow light with a spectral range of 420-800 nm and a central wavelength of 560 nm, achieving an external quantum efficiency of 75%. Notably, under 400 nm violet excitation, the luminous intensity of the phosphor can reach 88.2% of its maximum 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 [(Ba
0.6
Ca
0.7
Sr
0.7
)O
2
-SiO
2
]∶Eu
2+
yellow phosphor with commercial red, blue, and cyan phosphors and coupling with a 410 nm violet LED chip. The resulting LED exhibited high color rendering index (
R
a
= 96), high color saturation index (
R
g
= 100), and high color fidelity index (
R
f
= 95.1). The entropy-increasing strategy proposed in this study also provides a new approach for the development of novel high-efficiency and stable phosphor systems.
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