Afterglow and thermoluminescence of ZrO2 nanopowders

• Autorzy: Laurits Puust , Valter Kiisk , Kathriin Utt , Hugo Mändar , Ilmo Sildos
• Języki publikacji: EN

Abstrakty

EN

A careful study of the phosphorescence afterglow and the thermoluminescence (TL) of sol-gel-prepared m-ZrO2 nanocrystalline powders in an extended temperature range −100 to 300 °C was carried out. Wavelength-resolved TL proved the existence of a single active luminescence centre in this temperature range. A TL method based on various heating rates was used to derive more reliable trap depths of 0.75, 0.95, 1.25, 1.46 and 1.66 eV whereas deconvolution methods provided somewhat lower values. The most intense room-temperature afterglows (that were easily observable beyond 1000 s) were obtained from samples annealed at 1250 and 1500 °C, and were attributed mainly to depopulation of the 1.25 eV traps.

Słowa kluczowe

EN

zirconium dioxide; photoluminescence; afterglow; thermoluminescence; electron traps

• Czasopismo: Open Physics
• Rocznik: 2014
• Tom: 12
• Numer: 6
• Strony: 415-420

Daty

wydano

2014-06-01

online

2014-05-31

Twórcy

autor

Laurits Puust

• Institute of Physics, University of Tartu, Riia str 142, 51014, Tartu, Estonia,

autor

Valter Kiisk

• Institute of Physics, University of Tartu, Riia str 142, 51014, Tartu, Estonia,

autor

Kathriin Utt

• Institute of Physics, University of Tartu, Riia str 142, 51014, Tartu, Estonia

autor

Hugo Mändar

• Institute of Physics, University of Tartu, Riia str 142, 51014, Tartu, Estonia

autor

Ilmo Sildos

• Institute of Physics, University of Tartu, Riia str 142, 51014, Tartu, Estonia

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Identyfikatory

DOI

10.2478/s11534-014-0456-9