Strong red upconversion luminescence of CaAl2O4: Yb3+/Er3+ for optical thermometry

被引：0
作者：
Zhang, Lijuan [1 ]
Wang, Cong [1 ]
Zhang, Tianhang [1 ]
Jin, Wei [2 ]
Ding, Changchun [2 ]
Wang, Zongyi [3 ]
机构：
[1] Civil Aviat Flight Univ China, Sch Air Traff Management, Guanghan 618307, Peoples R China
[2] Xihua Univ, Sch Sci, Key Lab High Performance Sci Computat, Chengdu 610039, Peoples R China
[3] Quanzhou Jinjiang Int Airport, Quanzhou 362299, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2025年 / 44卷
关键词：
Upconversion luminescence; Rare earth doping; Intense red emission; Optical temperature measurement; PHOSPHOR;
D O I：
10.1016/j.mtcomm.2025.111859
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A CaAl2O4 upconversion luminescent material co-doped with Yb3+ and Er3+ ions was successfully synthesized via a high-temperature solid-state method. The CaAl2O4: Yb3+/Er3+ phosphor, when excited by a 980 nm near- infrared laser, shows weak green emissions at 542 nm and 554 nm (from 2H11/2 and 4S3/2 to 4I15/2), and stronger red emissions at 653 nm and 670 nm (from 4F9/2 to 4I15/2). The optimal doping concentrations for Yb3+ and Er3+ were determined to be 0.07 and 0.02, respectively, with a red-to-green emission intensity ratio reaching as 11.9. In this material, the dominant excitation pathway for the upconversion process involves energy transfer through Yb3+ (2F5/2) + Er3+ (4I13/2) -> Yb3+ (2F7/2) + Er3+ (4F9/2). In addition, CaAl2O4: 0.07Yb3+/0.02Er3+ phosphor has good optical temperature measurement at 298-673 K with a maximum relative sensitivity of 0.64 % K-1 (673 K).
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页数：8
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