The emission spectra of the Er containing

Table 4.
Parameters of CK-636 interatomic interaction potential.Interaction╬╗ (aJ/Å2)¤ü (Å)Ca–O311.060.3697Gd–O400.430.3024W–O(1)926.720.3346W–O(2)677.720.3662O–O325.170.3807Full-size tableTable optionsView in workspaceDownload as CSV
Fig. 6. The upconversion photoluminescence emission spectra of (a) CaGd2(WO4)4, (b) CaGd1.8(WO4)4:Er0.2, (c) CaGd1.7(WO4)4:Er0.1Yb0.2 and (d) CaGd1.5(WO4)4:Er0.05Yb0.45 particles excited under 980 nm at room temperature.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 7. The schematic energy level diagrams of Er3+ ions (activator) and Yb3+ ions (sensitizer) in the as-prepared CaGd2(WO4)4:Er3+/Yb3+ system and the upconversion mechanisms accounting for the green and red emissions under 980-nm laser excitation. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)Figure optionsDownload full-size imageDownload as PowerPoint slide