Eu3+ and Cu2+ ions doped ZnS microspheres emission in the yellow–orange region
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Photoluminescence (PL) emission properties of hydrothermally synthesized zinc sulfide (ZnS) and doped (Cu2+, Eu3+, Cu2+ and Eu3+) zinc sulfide microspheres were studied. The samples were characterized by X‐ray diffraction, energy‐dispersive X‐ray analysis, field emission scanning electron microscopy, ultraviolet–visible and photoluminescence spectrophotometers. Hydrothermally synthesized ZnS microspheres give a broad emission in the 405–750 nm range. The quenching of broad PL intensity was observed in the Cu2+ ions and Eu3+ ions separately doped ZnS samples. ZnS microspheres codoped with Eu3+ and Cu2+ ions gives narrow and enhanced yellow–orange emission (530–650 nm) that desired for the bioimaging applications and fabrication of white light-emitting sources.
Krishna Sagar C. K. thanks the University Grants Commission (UGC), Government of India, for financial support provided in the form of Basic Scientific Research (BSR) Fellowship in Science. The authors acknowledge Professor M. K. Jayaraj, Nanophotonics and Optoelectronic Devices Laboratory, Department of Physics, Cochin University of Science and Technology (CUSAT), for providing XRD measurements under the Department of Science and Technology nano mission initiative program. The authors also thank Department of Science and Technology-Fund for Improvement of Science and Technology infrastructure (DST‐FIST) for providing the financial support for acquiring FESEM facility and DST PURSE for acquiring EDX facility at the Department of Physics, CUSAT.
- 23.A.K. Kole, P. Kumbhakar, Res. Phys. 2, 150 (2012)Google Scholar