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Indexed by:期刊论文

Date of Publication:2018-10-01

Journal:APPLIED PHYSICS B-LASERS AND OPTICS

Included Journals:SCIE

Volume:124

Issue:10

ISSN No.:0946-2171

Abstract:The CaSrSiO4 nanophosphor-doped 0.7mol% Tb3+ ions have been prepared by the high-temperature sintering method. XRD pattern is consistent with the standard card of CaSrSiO4 host, and the average particle size of CaSrSiO4:0.7Tb is about 50nm. There exist intense green (544, 552nm) and weak blue (485, 488nm), yellow (588nm), and red (625nm) emissions under the excitation of 325nm He-Cd laser, corresponding, respectively, to the transitions of Tb3+ ions from D-5(4) and its splitting to F-7(5,4,6,3,2) energy levels. The low-temperature photoluminescence characteristics of the sample are measured in the range of 290-10K. The relationship between fluorescence intensity ratio and temperature is FIR=0.895+0.469exp(-145.8/T) and the maximum value of sensitivity is 17.6x10(-4)K(-1) at 70K, indicating that CaSrSiO4:Tb3+ nanophosphor is a promising sensing material for low-temperature measurement.