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Effect of temperature on the luminescence and decay behavior of divalent europium in lithium barium borate.
- Source :
- Physica Status Solidi. A: Applications & Materials Science; Dec2015, Vol. 212 Issue 12, p2922-2927, 6p
- Publication Year :
- 2015
-
Abstract
- The optical properties of LiBaBO<subscript>3</subscript> doped with Eu<superscript>2+</superscript> are investigated in the temperature regime between 10 and 525 K for the first time. At room temperature (RT), a broad emission band peaking around 485 nm is observed. The emission is ascribed to the 4f<superscript>6</superscript>5d<superscript>1</superscript> → 4f<superscript>7</superscript> transition on Eu<superscript>2+</superscript>. The excitation spectra consist of broad bands between 220 and 450 nm. The emission intensity shows no remarkable decline at lower temperatures; although it decreases drastically at higher temperatures. The Stokes shift is calculated to be 0.52 eV. The thermal activation of an electron from the Eu<superscript>2+</superscript> excited state to the conduction band is responsible for the thermal quenching behavior in LiBaBO<subscript>3</subscript>:Eu system. The energy gap E<subscript>A</subscript> for the best fit of decay time is 0.38 eV. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18626300
- Volume :
- 212
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Physica Status Solidi. A: Applications & Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 111555420
- Full Text :
- https://doi.org/10.1002/pssa.201532399