Synthesis and Physical Properties of Mn Doped ZnO Dilute Magnetic Semiconductor Nanostructures

Laboratory of Nanoscience and Technology, Department of Physics, International Islamic University, Islamabad, 45320 Pakistan
Journal of Superconductivity and Novel Magnetism (Impact Factor: 0.93). 01/2011; 24(1):699-704. DOI: 10.1007/s10948-010-0940-4

ABSTRACT Mn doped ZnO nanostructures have been prepared using low temperature simple, quick, and versatile synthesis approach. The
structural, microstructural, and vibrational investigations reveal that as prepared nanostructures with low Mn doping concentration
have single hexagonal phase and are grown along the preferred c-axis. The X-rays photoelectron spectroscopy demonstrates that the Mn ions are in mixed oxidation states for high doping concentration
of Mn, while are in 2+ oxidation state for low concentration into ZnO lattice. The photoluminescence spectrum (PL) exhibits
a significant red-shift of 22 nm in the optical band gap of doped ZnO and shows the improved luminescence properties, which
makes it potential for its use in the photocatalyst, optoelectronics and solar cell nanodevices. Furthermore, the magnetic
measurement of Mn doped ZnO nanostructures exhibits the ferromagnetism at room temperature.

KeywordsFerromagnetism–Mn doping–ZnO–Red shift–Narrowing of band-gap