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Title: Nonlinear optical property and fluorescence quenching behavior of PVP capped ZnS nanoparticles co-doped with Mn2+ and Sm3+
Authors: Prasanth, S.
Irshad, P.
Raj, Rithesh D.
Vineeshkumar, T.V.
Philip, Reji
Sundarasanakumar, C.
Keywords: Three photon absorption
Issue Date: Oct-2015
Publisher: Elsevier B.V
Citation: Journal of Luminescence, 2015, Vol. 166, p167-175
Abstract: ZnS nanoparticles co-doped with different percentages of Mn2+ and Sm3+ were synthesized by the chemical co-precipitation method using polyvinylpyrrolidone (PVP) as capping agent. Cubic zinc blende phase of the samples was confirmed from X-ray diffraction. The strong interaction between PVP and ZnS nanoparticles was studied from Fourier Transform Infrared (FTIR) spectrum. The band gap values of ZnS and co-doped ZnS nanoparticles were calculated from UV‐Visible spectra. The photoluminescence spectra of pure ZnS nanoparticles showed an emission at 436 nm and when doped with Mn2+ and Sm3+ an extra peak with high intensity was observed at 596 nm. On increasing the mole percentage of dopants the intensity of the extra peak showed an enhancement until a certain concentration and then a reduction with further increase in concentration. The binding parameters were determined by Stern‐Volmer relation. The nonlinear absorption coefficients of the doped and undoped samples were calculated using Z-scan technique.
Description: Restricted Access.
ISSN: 0022-2313
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Copyright: 2015 Elsevier B V.
Appears in Collections:Research Papers (LAMP)

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