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Study of composition dependent structural, optical, and magnetic properties of Cu-doped Zn1-xCdxS nanoparticles
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
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2010 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 108, no 12, 123519- p.Article in journal (Refereed) Published
Abstract [en]

Cu-doped Zn1-xCdxS nanoparticles were synthesized by coprecipitation technique in ice bath at 280 K. The band gap energy of Zn1-xCdxS:Cu nanoparticles can be tuned to a lower energy by increasing the Cd content, indicating the formation of the alloyed nanoparticles. The alloy structure is further supported by the systematic shifting of characteristic x-ray diffraction peaks to lower angles with increase in Cd content. Systematic copper doping induces a red shift in the energy band gap of Zn0.9Cd0.1S:Cu nanoparticles with increase in copper concentration. Cu-doped Zn0.9Cd0.1S nanoparticles were found to have ferromagnetic nature at 5 K whereas undoped particles were found to be diamagnetic. Green luminescence further proves proper doping of Cu into the ZnCdS matrix. It is believed that the green luminescence originates from the recombination between the shallow donor level (sulfur vacancy) and the t(2) level of Cu2+. This method provides an inexpensive and simple procedure to produce ternary ZnCdS: Cu nanoparticles with tunable optical properties via changing Cd and/or Cu concentrations.

Place, publisher, year, edition, pages
2010. Vol. 108, no 12, 123519- p.
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-30530DOI: 10.1063/1.3524516ISI: 000285768800039ScopusID: 2-s2.0-78650867173OAI: diva2:401813
QC 20110304Available from: 2011-03-04 Created: 2011-02-28 Last updated: 2011-03-04Bibliographically approved

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Nagar, Sandeep
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