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 |
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| 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: |
Materials science
Analytical chemistry Physics::Optics Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Ion Inorganic Chemistry [SPI]Engineering Sciences [physics] [CHIM]Chemical Sciences Emission spectrum Electrical and Electronic Engineering Physical and Theoretical Chemistry Astrophysics::Galaxy Astrophysics Spectroscopy ComputingMilieux_MISCELLANEOUS Organic Chemistry Rate equation 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Photon upconversion 0104 chemical sciences Electronic Optical and Magnetic Materials Excited state 0210 nano-technology Luminescence Single crystal Excitation |
| 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 |
| 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 |
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