Spectroscopic characterization by up conversion of Ho3+/Yb3+ codoped CdF2 single crystal

Autor: Hamid Satha, Jean-Pierre Jouart, Daniel Zambon, Rachid Mahiou, Sabrina Bordj, Anthony Barros, M. Diaf
Přispěvatelé: Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Optical Materials
Optical Materials, Elsevier, 2021, 118, pp.111249. ⟨10.1016/j.optmat.2021.111249⟩
Optical Materials, 2021, 118, pp.111249. ⟨10.1016/j.optmat.2021.111249⟩
ISSN: 0925-3467
1873-1252
DOI: 10.1016/j.optmat.2021.111249⟩
Popis: Single crystal of CdF2 codoped with the couple Ho3+/Yb3+ with good optical quality were grown by a Bridgman technique after purification of the starting materials. Emission spectra are recorded at room temperature under UV and NIR excitation. The kinetics of the green and red emissions arising from both (5F4, 5S2) and 5F5 excited states of Ho3+ ions are analyzed in the frame of Ho3+→Ho3+ and Yb3+↔Ho3+ energy transfers. The luminescence decays are parametrized using Inokuti-Hirayama model considering dipole-dipole interaction, in the case of UV excitation and also NIR excitation for the green emission, leading to a R0 critical transfer distance of 9–11 A. The kinetics of the 5F5→5I8 red upconverted emission is analyzed and discussed using a rate equation model.
Databáze: OpenAIRE