荧光粉
材料科学
光致发光
分析化学(期刊)
量子效率
兴奋剂
发光二极管
发光
发射强度
半最大全宽
热稳定性
光电子学
矿物学
化学
有机化学
色谱法
作者
Zhen Gao,Yi Zhang,Ming‐Yong Han,Shuyang Chen,Yingguang Li,Jie Li,Jingwei Guo,Xinfeng Jin,Ying Tian,Degang Deng,Shiqing Xu
摘要
Abstract Recently, there has been a growing demand for broadband near‐infrared (NIR) phosphor. The paper proposes a novel Cr 3+ doped Ca 2 Y 3 Sb 3 O 14 phosphor through basic research of Ca 2 Ln 3 Sb 3 O 14 : Cr 3+ (Ln = Sc, Lu, and Y) phosphor. Under 467 nm excitation, Ca 2 Y 3 Sb 3 O 14 : Cr 3+ phosphor shows a broad NIR emission band (650–950 nm) centered at 776 nm with a full width at half‐maximum of 110 nm. The optimal Cr 3+ doping concentration is 0.05, with an internal quantum efficiency of 78%. Meanwhile, the photoluminescence emission intensity at 373 K remains 61.3% of that at room temperature. Using phosphor‐in‐glass technology, a glass–ceramic plate showed a slight improvement in its thermal stability compared to the pure phosphor. Combining Ca 2 Y 3 Sb 3 O 14 : 0.05Cr 3+ phosphor with a commercial blue‐light‐emitting chip presents an output power of 44.51 mW with a photoelectric conversion efficiency of 14.78% at a drive current of 100 mA. These results suggest that the Ca 2 Y 3 Sb 3 O 14 : Cr 3+ phosphor has great potential in the pc‐light‐emitting diodes.
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