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Intensity Enhancement of Self-Activated Blue Luminescence of ZnS Phosphors by $\[Mg^2^+\]$ Ions

Kutty, TRN and Revathi, R (1985) Intensity Enhancement of Self-Activated Blue Luminescence of ZnS Phosphors by $\[Mg^2^+\]$ Ions. In: Solid State Communications, 55 (2). pp. 197-200.

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Abstract

Addition of < 1 mol.% $\[Mg^2^+\]$ ions enhances the intensity of blue photo- and cathodo-luminescence in ZnS phosphor with $\lambda_{max}$ at 468 nm. All characteristics of this emission indicate that the luminescence involves $\[(V_Z_n-Br_S\]$)' centres whose hole binding energy modified by the presence of $\[Mg^2^+\]$ in the vicinity. The oscillator strength of the transition for ZnS: 0.5 Mg is larger than that of self-activated ZnS. The capture cross section for electrons $\[(6\times10^-^1^9cm^2\]$) and holes $\[(2\times10^-^1^5cm^2)$ are also increased by the presence of $\[Mg^2^+\]$. The recombination energy of the electron-hole pair transferred to $\[(V_z_n-Br_S\]$)' via $Mg^{2+}$, causing enhancement in emission intensity.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: H.S. Divakara
Date Deposited: 03 Jul 2008
Last Modified: 19 Sep 2010 04:46
URI: http://eprints.iisc.ac.in/id/eprint/14745

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