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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Sociedad Mexicana de Física A.C.
2007
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=57016046011 |
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Inhaltsangabe:
- Non-isolated pair model for upconversion energy transfer processes S.O. Vásquez Física, Astronomía y Matemáticas Upconversion energy transfer processes The description of the temporary evolution of upconversion energy transfer processes in solid samples including doped luminescent centersis revised using a simple but non-restrictive pair model. The formalism is related to upconversion processes between a collective of donorand acceptor optical centers, and leads to analytic expressions for the temporary behavior of the emission intensities from the intermediateexcited states and the up converted excited state. From a microscopic viewpoint, the results of the model are compared with numerical solutions of the system of differential equations and with those obtained from kinetic type equations, showing the limits of directly using the latter in the analysis of upconversion processes. The proposed model makes it possible to obtain average macroscopic solutions, explicitlydependent on the concentration of dopant luminescent centers in the crystalline lattice, and permits an adequate prediction of the shapes ofthe decay curves. It would improve the determination of the upconversion energy transfer rates from experimental data. 2007 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57016046011 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.1 Vol.53