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Optimization and enhancement of fluorescence in strontium sulphide by cadmium incorporation
Author(s) -
Ray B.,
Lenton P.,
Arterton B. W.,
Viney I. V. F.,
Brightwell J. W.,
Clough S.
Publication year - 1997
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985139
Subject(s) - strontium , photoluminescence , fluorescence , ion , materials science , cadmium , divalent , analytical chemistry (journal) , solubility , solid solution , wavelength , lattice (music) , chemistry , optoelectronics , optics , physics , environmental chemistry , organic chemistry , acoustics , metallurgy
— Solid solutions of Sr 1−x Cd x S, up to the solid solubility limit of x = 0.03, have been prepared by two methods to produce powders with high and low Cd concentrations. Substantially enhanced photoluminescence emission was observed at both 77 and 300K with the greatest effect occurring at x around 0.001. The emission was centered around 420 nm for the most intense sample, at x = 0.0008, with a half‐width of 50–100 nm depending on temperature. At 300K, for higher Cd concentrations, there was considerable broadening of the emission with a shift in the peak to longer wavelengths and a distinctive shoulder between 550 and 600 nm. It is conjectured that the emission processes are linked to divalent Cd ions with broadening resulting at higher Cd concentrations due to differing ion environments and related local lattice strain.