研究目的
Investigating the color-tunable and upconversion luminescence properties of Gd2O2S:Er,Tm phosphors through experimental and computational methods.
研究成果
Color-tunable emission can be obtained by adjusting the doping concentration of Tm3+ ions in Tm3+/Er3+-co-doped Gd2O2S phosphors under 980 nm diode laser excitation. The obtained color tunability from green to red regions of the visible spectra has great potential in optical displays, fluorescent microprobe, biomedicine multi-color displays and near-infrared light-emitting diodes, etc.
研究不足
The study focuses on the luminescence properties under specific conditions (980 nm excitation) and may not cover all potential applications or environmental conditions.
1：Experimental Design and Method Selection:
Solid-state reaction method in vacuum was used for the phosphors synthesis.
2：Sample Selection and Data Sources:
Starting materials included Gd2O3, Er2O3, Tm2O3, S, Na2CO3, and Li2CO
3：List of Experimental Equipment and Materials:
X-ray diffractometer (Mini Flex 600), transmission electron microscope (JEM-2100), fluorescence spectrometer (FLS980).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The starting chemicals were mixed, pelletized, annealed at 1000°C for 2h under vacuum, then washed.
5：Data Analysis Methods:
XRD for crystal structure, TEM for morphology, fluorescence spectrometer for UC spectra and decay curves.
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