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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 Solid State Communications Elsevier. Copyright of this article belongs to Elsevier. Division of Chemical Sciences > Inorganic & Physical Chemistry 03 Jul 2008 19 Sep 2010 04:46 http://eprints.iisc.ac.in/id/eprint/14745

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