Abstract
The optical electronic spectra of Cs2NaErF6, Cs2NaY0.9Er0.1F6, and Cs2NaM0.5Er0.5F6 (M Sc, Ga) have been investigated at temperatures down to 10 K. The absorption spectra span the range from 6000 to 41 000 cm-1, whereas emission has been observed from the 4S3/2, 4F9/2, 4I9/2, and 4I11/2 multiplet terms in the spectral range from 25 000 to 9000 cm-1. Each transition between crystal field levels comprises extensive, well-resolved vibronic structure. From the detailed vibronic analyses, 39 crystal field levels have been assigned from 0 to 27 642 cm-1. A configuration interaction assisted crystal field (CIACF) calculation provides a good energy level fit with reasonable energy parameters. The mean deviation of the standard 4f112p6 fit to the energy levels (23 cm-1) exceeded that for the 4f112p6/4f122p5 CIACF fitting (6.4 cm-1), which provides 4f112p6/4f122p5 further evidence for the importance of the charge-transfer configuration interaction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
