Adding Na2CO3 and repeated sintering enhancing red upconversion luminescence in GdLaO3:Er3+/Yb3+/Sc3+ under 980 nm laser excitation

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2025-02-05 DOI:10.1016/j.jlumin.2025.121123

Meiling Li , Yongze Cao , Lihong Cheng , Yuhan Fan , Danyang Wu , Yichao Wang , Tianshuo Liu , Baojiu Chen

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引用次数: 0

Abstract

GdLaO₃(GLO):0.1Er³⁺/0.1 Yb³⁺/0.1Sc³⁺ phosphors were prepared by solid state sintering by adding Na₂CO₃. When the adding Na₂CO₃ is 0.05 mol%, the upconversion luminescence (UCL) intensity is the highest. In order to increase the brightness, we optimize the preparation process and carry out repeated sintering at 1500 °C. The samples repeatedly sintered four times have the highest UCL intensity. Under the 980 nm laser power density of 197.84 W/cm², the red UCL integral intensity of GLO:Er³⁺/Yb³⁺/Sc³⁺ is 1.1 times greater than that of β-NaYF₄:Er³⁺/Yb³⁺. This excellent UCL intensity is attributed to the shrinkage of the volume, the reduction of oxygen defects, and the increase of n in the multiphoton process. The maximum relative temperature sensitivity S_R is found to be 1.461 % K⁻¹ using the luminescence intensity ratio (LIR) technique. GLO:Er³⁺/Yb³⁺/Sc³⁺ has an outstanding pure red UCL intensity and can replace β-NaYF₄:Er³⁺/Yb³⁺ in applications such as luminescence display and temperature sensing.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.