Electron Transfer between Different Lanthanide Centers in BaF2 Crystals—Part II: Transfer Mechanisms
| Autor: | E. A. Radzhabov, V. A. Kozlovskii |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Lanthanide Materials science Solid-state physics Barium fluoride Condensed Matter Physics 01 natural sciences Acceptor Photoinduced electron transfer Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound Electron transfer chemistry 0103 physical sciences Physical chemistry 010306 general physics Fluoride |
| Zdroj: | Physics of the Solid State. 61:785-788 |
| ISSN: | 1090-6460 1063-7834 |
| Popis: | Processes of photo-induced electron transfer from a bivalent acceptor lanthanide (Eu, Sm, and Yb) onto a trivalent donor lanthanide (Nd, Sm, Dy, Tm, and Yb) and the inverse thermally activated transfer are studied in barium fluoride crystals. At room temperature, photoinduced electron transfer is accompanied by oncoming displacement of the interstitial charge-compensating fluoride ion. On photoquenching at low temperatures, a bivalent donor lanthanide remains next to the interstitial fluoride ion, which causes a redshift of its 4f–5d absorption bands. The shift increases as the lanthanide size decreases (as in the series Nd, Sm, Dy, Tm, and Yb). A detailed analysis of the mechanisms of photo and thermal electron transfers between the different lanthanide centers in BaF2 crystals is provided. |
| Databáze: | OpenAIRE |
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