The Intermediate Role of Gd3+ in the Energy Transfer from a Sensitizer to an Activator (Especially Tb3+)
| Autor: | W. L. Konijnendijk, J.Th.W. de Hair |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Energy transfer Phosphor Condensed Matter Physics Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Activator (phosphor) Materials Chemistry Electrochemistry Quantum efficiency Luminescence Excitation |
| Zdroj: | Journal of The Electrochemical Society. 127:161-164 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.2129608 |
| Popis: | Energy transfer from a sensitizer to an activator via Gd3+ ions is discussed. This is done for the Bi3+ → Dy3+ and Sb3+ → Dy3+ transfer in , and for the Bi3+ → Tb3+ transfer in . The phosphor shows Tb3+ luminescence with a quantum efficiency of 80% for excitation of Bi3+. After excitation of Bi3+, energy transfer takes place to Gd3+ ions. Then the energy may migrate from one Gd3+ to another until energy transfer from Gd3+ to Tb3+ occurs. Compared to the energy transfer in other sensitized Tb3+ phosphors, this process has a high efficiency at relatively low activator concentrations. The energy transfer from Bi3+ to Gd3+ and between Gd3+ions mutually has been investigated for . For energy transfer between Gd3+ ions is observed. The quantum efficiency of the Gd3+ luminescence for Bi3+ excitation of amounts to 75% and decreases for increasing Gd concentrations. |
| Databáze: | OpenAIRE |
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