X-ray and pulsed electron beam excited luminescence and optical absorption in KTaO3 crystals
| Autor(en): | Millers, D. Grigorjeva, L. Trepakov, V. Kapphan, S.E. Boatner, L.A. |
Stichwörter: | Light absorption; Luminescence; Potassium compounds; Semiconductor doping; Single crystals, Electron beam excitation; Luminescence decay kinetics; Time-resolved transient absorption, Electron beams | Erscheinungsdatum: | 2005 | Journal: | Physica Status Solidi C: Conferences | Volumen: | 2 | Ausgabe: | 1 | Startseite: | 200 | Seitenende: | 203 | Zusammenfassung: | Pulsed electron beam excited time-resolved transient absorption and luminescence have been studied in nominally pure and Li- doped KTaO3 single crystals. It is found that under electron beam excitation in nominally pure KTaO3 the absorption bands peaks at ∼0.8 eV, ∼1.1 eV and 1.7 eV whereas in KTaO3:Li at ∼1.1 eV and ∼1.7 eV. The transient absorption decay varies over the spectrum thus revealing several short-lived centers. The main luminescence peak is centred at ∼2.7 eV in all KTaO3 specimens. Luminescence decay kinetics observed for the two bands slightly differ indicating different kinds of excited states are involved. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
ISSN: | 16101634 | DOI: | 10.1002/pssc.200460145 | Externe URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-27444446370&doi=10.1002%2fpssc.200460145&partnerID=40&md5=0ee4847651ce99b2b23f02096a9c4578 |
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