荧光粉
发光
兴奋剂
能量转移
红外线的
热稳定性
激发
分析化学(期刊)
近红外光谱
发射光谱
材料科学
化学
物理
光电子学
光学
谱线
分子物理学
量子力学
色谱法
有机化学
天文
作者
Ziwei Lu,Yongfu Liu,SunYueZi Chen,Peng Sun,Zhaohua Luo,Xiaojun Wang,Jun Jiang
标识
DOI:10.1021/acsaom.3c00011
摘要
Developing high-performance broadband near-infrared (NIR) phosphors for NIR phosphor-converted light-emitting diodes is still a challenge. Co-doping is an effective strategy for enhancing the performance of NIR phosphors. Herein, we explore a NIR phosphor by co-doping Yb3+ into LiScSi2O6:Cr3+ (LSS:Cr3+). Under 468 nm excitation, LSS:Cr3+,Yb3+ exhibits a broad NIR emission from 700 to 1100 nm. Due to the efficient energy transfer from Cr3+ to Yb3+, the maximum bandwidth of LSS:Cr3+,Yb3+ reaches 219 nm, broader than that of LSS:Cr3+ (170 nm). The addition of Yb3+ further suppresses the thermal quenching compared with that of the Cr3+ singly doped specimen. At 150 °C, LSS:Cr3+,Yb3+ retains 62% of the emission intensity at room temperature, while that of singly doped LSS:Cr3+ is only 40%. These results indicate that the construction of Cr3+ → Yb3+ energy transfer not only can broaden the emission spectrum but also can improve the thermal stability.
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