Luminescence excitation study of the higher energy states of Pr3+ and Mn2+ in SrAlF5, CaAlF5, and NaMgF3
| Autor: | J.P. Chaminade, Pieter Dorenbos, C.W.E. van Eijk, E. van der Kolk, A.P. Vink, M. Weil |
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| Přispěvatelé: | Interfaculty Reactor Institute, Delft University of Technology (TU Delft), Netherlands Organization for Scientific Research, Institute for Chemical Technology and Analytic, Vienna University of Technology (TU Wien), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB) |
| Rok vydání: | 2004 |
| Předmět: |
Physics::General Physics
Luminescence Photon Photoluminescence Astrophysics::High Energy Astrophysical Phenomena General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Condensed Matter::Materials Science Energy level Physics::Chemical Physics Codoped Fluoroaluminate Manganese Chemistry Sodium PACS: 78.55.Hx 71.20.Ps 71.35.Pq Fluoromagnesate [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Photon upconversion 0104 chemical sciences Strontium Excited state Calcium Quantum efficiency Praseodymium Atomic physics 0210 nano-technology Excitation |
| Zdroj: | Journal of Applied Physics Journal of Applied Physics, American Institute of Physics, 2004, 95 (12), pp.7867-7872. ⟨10.1063/1.1751628⟩ |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | The possibility to use Mn2+ co-doping to modify the emission properties of Pr3+-based quantum cutting phosphors—i.e., phosphors that emit one UV and one visible photon for each absorbed vacuum UV (VUV) photon—into phosphors that emit two visible photons, was studied experimentally. In this respect a luminescence excitation study, using synchrotron radiation, between 500 and 50 nm of Pr3+ and Mn2+ impurities in SrAlF5, CaAlF5, and NaMgF3 was performed. Excitation of Pr3+ into the 4f5d excited states results in emission of UV photons from the 1S0 state followed by visible photons from the 3P0 state with an internal quantum efficiency exceeding 100%. It was found that a favorable overlap between the 1S0→1I6 Pr3+ emission and the 6A1→4Eg, 4A1g Mn2+ absorption exists that should promote energy transfer from Pr3+ to Mn2+. However no such energy transfer could be observed in SrAlF5. At higher excitation energies (>7 eV) intense structured Mn2+ excitation bands are found that are assigned to 3d5→3d44s transitions, Mn2+ related charge transfer transitions, and Mn2+ bound excitons. These bands have an unfavorable overlap with the Pr3+ 4f5d states, preventing efficient selective Pr3+ excitation, prerequisite for the quantum cutting process. |
| Databáze: | OpenAIRE |
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