Renero-Lecuna, C.; Martin-Rodriguez, R.; Valiente, R.; Gonzalez, J.; Rodriguez, F.; Krämer, K.W.; Güdel, H.U. (2011). Origin of the high upconversion green luminescence efficiency in -NaYF4:2% Er3+,20% Yb3+. Chemistry of materials, 23(15), pp. 3442-3448. Washington, D.C.: American Chemical Society 10.1021/cm2004227
Full text not available from this repository. (Request a copy)Site-selective spectroscopy in hexagonal beta-NaYF4:Er3+,Yb3+ has revealed different environments for Er3+ ions (multisite formation). The low-temperature S-4(3/2) -> (I15/2Er3+)-I-4 green emission depends on the excitation wavelength associated with the F-4(7/2) Er3+ level. We have studied the effect of hydrostatic pressure on the green, red, and blue Er3+ emission upon NIR excitation at similar to 980 nm, in order to establish the role played by energy resonance conditions and the multiple Er3+ sites due to the disordered structure for the upconversion (UC) process (energy tuning). The variation of photoluminescence spectra and lifetimes as a function of pressure and temperature reveals that the origin of the high green UC efficiency of the beta-NaYF4:Er3+,Yb3+ compound is mainly due to the multisite distribution, and the low phonon energy of the host lattice.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Krämer, Karl, Güdel-Zahler, Hans-Ulrich |
ISSN: |
0897-4756 |
Publisher: |
American Chemical Society |
Language: |
English |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:26 |
Last Modified: |
02 Mar 2023 23:21 |
Publisher DOI: |
10.1021/cm2004227 |
Web of Science ID: |
000293357100008 |
URI: |
https://boris.unibe.ch/id/eprint/9264 (FactScience: 214960) |
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