کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5398736 1505894 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear optical property and fluorescence quenching behavior of PVP capped ZnS nanoparticles co-doped with Mn2+ and Sm3+
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Nonlinear optical property and fluorescence quenching behavior of PVP capped ZnS nanoparticles co-doped with Mn2+ and Sm3+
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 166, October 2015, Pages 167-175
نویسندگان
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