Synthesis and morphological study of Mn doped ZnS films

Thool, Gautam Sheel; Baid, Mitisha; Singh, Ajaya Kumar; Singh, Narendra Pratap

doi:10.1016/j.matpr.2018.05.007

Cited by 3 publications

(1 citation statement)

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“…Stable ZnS crystals exist in cubic form (zinc blend) at room temperature and in hexagonal phases (wurtzite) at higher temperatures with band gap energies equivalent to 3.68 and 3.77 eV, respectively [5]. ZnS has been used for electro-luminescent devices, solar cells, and optical limiters as well as in optical reflectors due to its high linear refractive index and as dielectric filters due to its large optical gap [6]. ZnS shows optical nonlinearities like two-photon adsorption (TPA), second-harmonic generation (SHG), and THG that has elicited extensive interest in studying nonlinear optical behavior of ZnS nanostructures [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of ZnS–Ag2S core–shell nanospheres with enhanced nonlinear refraction

Haghighatzadeh

Kiani

Mazinani

et al. 2019

J Mater Sci: Mater Electron

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ZnS-Ag 2 S core-shell nano/hetero-junctions have been synthesized by a two-step co-precipitation technique, in which thin layers of Ag 2 S have been successfully coated on the surface of ZnS nanospheres. Structural studies and elemental analysis have been performed using X-ray diffraction, Fourier transfer infrared spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy, and high-resolution transmission electron microscopy. UV-Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy have been employed to investigate linear optical characteristics. Nanosecond laser pulsed-based single-beam Z-scan analysis has been used to examine the magnitude and the sign of the third-order nonlinear refractive indices. Samples show negative values of nonlinear refractive indices indicating self-defocusing optical nonlinearity under 1064 nm excitation. The results have shown that the third-order nonlinear refractive index in ZnS nanospheres can reach the magnitude of 61.0 × 10 −12 m 2 ∕W by encapsulating such a nanostructure within nanometer shells of Ag 2 S. The enhanced nonlinearity for ZnS-Ag 2 S core-shells has been found to be 9 times higher than sole ZnS nanoparticles, which was estimated to be about 6.4 × 10 −12 m 2 ∕W.

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