Skip to content

Research at St Andrews

Competing roles of defects in SrAl2O4:Eu2+,Dy3+ phosphors detected by luminescence techniques

Research output: Contribution to journalArticle

DOI

Author(s)

Y. Wang, M. Cui, Y. Zhao, Z. G. Xia, A. A. Finch, P. D. Townsend

School/Research organisations

Abstract

Thermoluminescence (TL) and radioluminescence (RL) spectra of the long-lasting phosphorescence of SrA12O4:Eu2+,Dy3+ with A1N addition and commercially used SrA12O4:Eu2+,Dy3+ were compared. Their spectra were slowly recorded over the temperature range from 25 to 673 K (400 °C). A1N offers a higher temperature TL peak, which should lengthen the phosphor lifetime. However, both TL and RL, especially that below room temperature, reveal that there are additional decay paths for the samples of SrA12O4:Eu2+,Dy3+ with A1N additions. These new defect sites reduce the phosphor efficiency. Some speculative models of potential sites are proposed and discussed. In addition, discontinuous intensity changes have been observed for both sample types in TL and RL spectra, which are assigned to the transitions of embedded impurity phases. The justification for this model is explained. Suggestions for future experimentation are also considered.
Close

Details

Original languageEnglish
Pages (from-to)1403-1412
Number of pages10
JournalJournal of Materials Research
Volume31
Issue number10
Early online date26 May 2016
DOIs
StatePublished - 28 May 2016

    Research areas

  • Defects, Dopant, Luminescence

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Dating agpaitic rocks: a multi-system (U/Pb, Sm/Nd, Rb/Sr and 40Ar/39Ar) isotopic study of layered nepheline syenites from the Ilímaussaq complex, Greenland

    Borst, A. M., Waight, T., Finch, A. A., Storey, M. & Le Roux, P. Jan 2019 In : Lithos. 324-325, p. 74-88 15 p.

    Research output: Contribution to journalArticle

  2. The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

    Allison, N., Cole, C., Hintz, C., Hintz, K., Rae, J. & Finch, A. 10 Oct 2018 In : Chemical Geology. 497, p. 162-169 8 p.

    Research output: Contribution to journalArticle

  3. Optical determination of the width of the band-tail states, and the excited state and ground state energies of the principal dosimetric trap in feldspar

    Riedesel, S., King, G. E., Prasad, A. K., Kumar, R., Finch, A. A. & Jain, M. 3 Sep 2018 In : Radiation Measurements. In press

    Research output: Contribution to journalArticle

  4. Temperature dependence of bulk luminescence from ZnO

    Cui, M., Zhang, Z., Wang, Y., Finch, A. & Townsend, P. D. Jun 2018 In : Luminescence. 33, 4, p. 654-659

    Research output: Contribution to journalArticle

Related by journal

  1. Ion size effects on thermoluminescence of terbium and europium doped magnesium orthosilicate

    Zhao, Y., Zhou, Y., Jiang, Y., Zhou, W., Finch, A. A., Townsend, P. D. & Wang, Y. 2015 In : Journal of Materials Research. FirstView

    Research output: Contribution to journalArticle

  2. 中孔分子筛MCM41的合成与结构

    Zhou, W. 1998 In : Journal of Materials Research. 12, Suppl., p. 1-6

    Research output: Contribution to journalReview article

  3. CHARACTERIZATION OF PB-DOPED AND CA-DOPED BI2+XSR2-XCUO6+DELTA

    SINCLAIR, DC., Irvine, J. T. S. & WEST, AR. Jan 1992 In : Journal of Materials Research. 7, 1, p. 43-47 5 p.

    Research output: Contribution to journalArticle

ID: 245469464