title: Photoluminescence and photoconductivity of ZnS:Mn(2+) nanoparticles synthesized via co-precipitation method.
abstract: Mn(2+) doped ZnS nanoparticles are characterized using UV-vis, photoluminescence and photoconductivity studies. The size of Mn(2+) doped ZnS NPs is estimated to be 2-4nm by X-ray diffraction. UV-vis spectra show a blue shift in absorption edge as compared to bulk counterpart. Photoluminescence spectra indicate that orange luminescence varies with Mn(2+) concentration. The Mn(2+) doped ZnS nanoparticles are found to be photosensitive. The doping of Mn(2+) ions improves the photosensitivity of the ZnS nanoparticles system. The time-resolved rise and decay of photocurrent indicate anomalous behavior during steady state illumination.
authors.affiliation: EPR Laboratory, Department of Physics, University of Allahabad, Allahabad 211002, India.
authors.forename: Ram
authors.initials: R
authors.lastname: Kripal
authors.forename: Atul K
authors.initials: AK
authors.lastname: Gupta
authors.forename: Sheo K
authors.initials: SK
authors.lastname: Mishra
authors.forename: Rajneesh K
authors.initials: RK
authors.lastname: Srivastava
authors.forename: Avinash C
authors.initials: AC
authors.lastname: Pandey
authors.forename: S G
authors.initials: SG
authors.lastname: Prakash
mesh_terms: D008027:Light; D049449:Luminescence; D008345:Manganese / Q000737:chemistry*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D013054:Spectrophotometry, Atomic; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D013440:Sulfides; D017967:Zinc Compounds; D008345:Manganese; C031238:zinc sulfide