Experiments and analysis of infrared quantum cutting luminescence phenomena of Ho3+/Yb3+ codoped nanophase oxyfluoride vitroceramics
| Autor: | Xiaobo Chen, Jinying Liu, Guo-Jian Yang, Gregory J. Salamo, Luan Chen, Masaaki Ohtsuka, Sawanobori Naruhito, Song Li |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Infrared business.industry Atomic and Molecular Physics and Optics Fluorescence spectroscopy Electronic Optical and Magnetic Materials Ion Optics Excited state Quantum efficiency Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence business Absorption (electromagnetic radiation) Excitation |
| Zdroj: | Optics Communications. 285:5247-5253 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2012.08.035 |
| Popis: | The infrared quantum cutting phenomenon, which is an international hot research field, of Ho3+Yb3+: oxyfluoride vitroceramics (FOV) was studied in the present paper. It was found from the fluorescence spectroscopy experiments that the excitation spectrum of 973.0 nm fluorescence of Yb3+ ion is very similar to the absorption and excitation spectra of Ho3+ ion. It suggests that the energy transfer from Ho3+ ion to Yb3+ ion is very efficient. Then, all the possible important energy transfer passages were analyzed. It was found that the energy transfers {5G4(Ho3+)→5F5(Ho3+), 2F7/2(Yb3+)→2F5/2(Yb3+)} and {5F5(Ho3+)→5I7(Ho3+), 2F7/2(Yb3+)→2F5/2(Yb3+)} result in the effective two-photon quantum cutting 973.0 nm fluorescence of Yb3+ ion when 5G4 or 3K7 or the above energy level of Ho3+ ion are excited. Finally, the quantum efficiency η Q E , 1 % Yb = 43.0 % and η Q E , 5 % Yb = 171.7 % of two-photon quantum cutting was calculated for Ho(0.5)Yb(1):FOV and Ho(0.5)Yb(5):FOV respectively. This research would be beneficial for the enhancement of solar cell efficiency. |
| Databáze: | OpenAIRE |
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