Luminescent modulation of zinc sulphide nano-particles by thermal injection method

ZnS coating with oleic acid nano-particles have been successfully synthesized through the oil-phase thermal injection method. As-prepared samples are characterized by powder X-ray diffraction, transmission electron microscopy and spectra analysis. The emission color of ZnS NPs changes from blue to cyan with different ratio of Zn/S. ZnS:xEu3+ NPs with different doping concentrations of Eu3+ ions have different emission intensities and CIE coordination. The emission peaks vary with the change of y value of ZnSeyS1-y NPs, and the chromaticity coordinate transit from green to yellow region. The emission color and mechanism of the luminescent properties of ZnS, ZnS:xEu3+ and ZnSeyS1-y NPs are studied in detail. The results indicate that the thermal mixture injection without toxic is an effective and green method for synthesizing metal sulphitde, and the energy level structure, particle size, photoluminescence of ZnS can be achieved by forming different defect or doping of Eu or Se ions. [Display omitted] •ZnS NPs were synthesized through thermal solution injection route.•The luminescent properties of ZnS NPs are modulated.•The Zn/S, doping Eu3+ ions and substituting Se for S atoms were realized.