Dual-mode optical thermometry and multicolor anti-counterfeiting based on Bi3+/Er3+ co-activated BaGd2O4 phosphor Academic Article uri icon

abstract

  • AbstractHere, Bi3+, Er3+ coactivated gadolinium phosphors with multimode emission properties are prepared, which can emits blue, green, and orange light under the excitation of ultraviolet, 980 and 1550nm, respectively. Moreover, BaGd2O4:Bi3+, Er3+ can show multicolor luminescence under different excitation conditions, such as pump light source, ambient temperature, working current, and other factors. Based on the dynamic luminescence characteristics, the dynamic anticounterfeiting experiments are designed based on the phosphor. At the same time, the material also shows multimode temperature sensing characteristics. Under the excitation of 980nm laser, three strong upconversion signals Er3+ ions are generated at 528nm (2H11/2), 555nm (4S3/2), and 668nm (4F9/2), which have different temperature dependences. Based on the fluorescence intensity ratio between thermalcoupled energy levels (2H11/2/4S3/2) and nonthermalcoupled energy levels (2H11/2/4F9/2) of Er3+ ions, respectively, the dualmode temperature thermometer was constructed with hightemperature sensitivity. In addition, the fluorescence lifetime of Bi3+ ions also has a strong temperature dependence, which can be used as another temperature detection signal, greatly improving the stability of thermometers under harsh conditions. Therefore, the material has a bright prospect in the field of anticounterfeiting and temperature sensing.

published proceedings

  • JOURNAL OF THE AMERICAN CERAMIC SOCIETY

author list (cited authors)

  • Fu, J., Zhou, L., Chen, Y., Lin, J., Ye, R., Lei, L., ... Xu, S.

citation count

  • 6

complete list of authors

  • Fu, Jie||Zhou, Liuyan||Chen, Yanling||Lin, Jianhua||Ye, Renguang||Lei, Lei||Shen, Yang||Deng, Degang||Xu, Shiqing

publication date

  • February 2023

publisher