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Absolute quantum yield for understanding upconversion and downshift luminescence in PbF$_{2}$:Er$^{3+}$,Yb$^{3+}$ crystals

Madirov, Eduard ORCID iD icon 1; Busko, Dmitry 1; Howard, Ian A. 1,2; Richards, Bryce S. ORCID iD icon 1,2; Turshatov, Andrey 1
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)
2 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)

Abstract:

The search for new materials capable of efficient upconversion continues to attract attention. In this work, a comprehensive study of the upconversion luminescence in PbF$_{2}$:Er$^{3+}$,Yb$^{3+}$ crystals with different concentrations of Yb$^{3+}$ ions in the range of 2 to 7.5 mol% (Er$^{3+}$ concentration was fixed at 2 mol%) was carried out. The highest value of upconversion quantum yield (ϕ$_{UC}$) 5.9% (at 350 W cm$^{-2}$) was found in the PbF$_{2}$ crystal doped with 2 mol% Er$^{3+}$ and 3 mol% Yb$^{3+}$. Since it is not always easy to directly measure ϕ$_{UC}$ and estimate the related key figure of merit parameter, saturated photoluminescence quantum yield (ϕ$_{UCsat}$), a method to reliably predict ϕ$_{UCsat}$ can be useful. Judd–Ofelt theory provides a convenient way to determine the radiative lifetimes of the excited states of rare-earth ions based on absorption measurements. When the luminescence decay times after direct excitation of a level are also measured, ϕ$_{UCsat}$ for that level can be calculated. This approach is tested on a series of PbF$_{2}$:Er$^{3+}$,Yb$^{3+}$ crystals. Good agreement between the estimates obtained as above and the directly experimentally measured ϕ$_{UCsat}$ values is demonstrated. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000158478
Veröffentlicht am 10.05.2023
Originalveröffentlichung
DOI: 10.1039/D3CP00936J
Scopus
Zitationen: 5
Web of Science
Zitationen: 5
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 03.05.2023
Sprache Englisch
Identifikator ISSN: 1463-9076, 1463-9084
KITopen-ID: 1000158478
HGF-Programm 38.01.05 (POF IV, LK 01) Simulations, Theory, Optics and Analytics (STOA)
Erschienen in Physical Chemistry Chemical Physics
Verlag Royal Society of Chemistry (RSC)
Band 25
Heft 17
Seiten 11986–11997
Nachgewiesen in Dimensions
Web of Science
Scopus
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