Electrical and optical characteristics of Ni doped ZnS clusters

Soni, Hemant; Chawda, Mukesh; Bodas, Dhananjay

doi:10.1016/j.matlet.2008.12.052

Cited by 52 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the doping of ZnS, has been extensively performed in the last decades determining that the impurity plays a very important role in the efficiency and position of the emission bands [8]. Luminescent properties of ZnS can be controlled using various dopants such as Ni, Fe, Mn, Cu etc [9]. Bera et al [10] prepared pure ZnS and Mn-doped ZnS using hydrothermal synthesis.…”

Section: Introductionmentioning

confidence: 99%

First principles calculations and experimental study of the optical properties of Ni-doped ZnS

Rodríguez

Zandalazini

Navarro

et al. 2019

Mater. Res. Express

View full text Add to dashboard Cite

Zinc sulphide doped with nickel (Ni:ZnS) has many applications in different fields like materials science, electronics, optics, and other industrial applications. Experimentally, a large variety of methods have been developed for Ni:ZnS synthesizing, where the chemical synthesis with capping agent is most successful, but has disadvantages like purity and the low performance. In addition, since there is not also much theoretical information about its features, the electronic and optical response of Ni:ZnS were studied, both experimentally by x-ray diffractometry (XRD), transmission electron microscopy (HR-TEM), and x-ray photoelectron spectroscopy (XPS) and theoretically by means of the density functional theory (DFT) calculations, giving an unified understanding of the electrooptical performance of this compound. In the same way, the importance of the inclusion of Ni impurities in the structure was studied and analyzed by the inclusion of a Hubbard potential in the calculations. We found that the optimal U value for Ni atoms is 4 eV in agreement with experimental results obtained by XPS. The dielectric function (ε 2 ) for pure and doped systems showed that the influence of the Ni atom is mainly given in the range of low energy regions (E<6 eV), where the new peaks are associated to transitions that include the impurity band states.

show abstract

Section: Introductionmentioning

confidence: 99%

First principles calculations and experimental study of the optical properties of Ni-doped ZnS

Rodríguez

Zandalazini

Navarro

et al. 2019

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…The research about diluted magnetic semiconductor (DMS) has attracted the attention of researchers since charge and spin degrees of freedom can be accommodated into a single material [6]. Transition metal-doped ZnS was prepared by several groups [6][7][8][9][10]. Different synthesis methods are available to prepare Mn-doped ZnS semiconductors such as chemical precipitation method, zeolite and vapor phase condensation method [11].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Mn-doped ZnS nanoparticles

et al. 2015

View full text Add to dashboard Cite

Mn-doped ZnS nanoparticles are synthesized by simple and cost effective chemical precipitation method. This diluted magnetic semiconductor is characterized by various techniques such as energy dispersive X-ray analysis, scanning electron microscopy, X-ray diffraction, photoluminescence and UV-Vis spectroscopy. High purity of the sample is confirmed by energy dispersive X-ray analysis. Sub-micrometer nanocrystals are observed using scanning electron microscope. Hexagonal phase of the material is confirmed by X-ray diffraction studies, and the micro-structural properties such as grain size, strain, dislocation density and texture coefficient are examined. High value of texture coefficient indicates the well-crystalline nature of the material. The band gap, Urbach energy and steepness parameter are calculated from the absorption spectrum. The band gap is also calculated from photoluminescence. The Stokes's shift, Urbach energy and steepness parameter are reported in the case of Mn-doped ZnS for the first time.

show abstract

“…Among the inorganic semiconductor nanoparticles, zinc sulfide ZnS is an important II-VI semiconductor, which has been studied extensively because of its broad spectrum of potential applications, such as in catalysis and electronic and optoelectronic nanodevices. Furthermore, luminescent properties of ZnS can be controlled using various dopants such as Ni, Fe, Mn, and Cu [13][14][15][16][17][18][19]. They not only give luminescence in various spectral regions but also enhance the excellent properties of ZnS.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Polyvinylpyrrolidone on the Optical Properties of the Ni‐Doped ZnS Nanocrystalline Thin Films Synthesized by Chemical Method

Thi

Tinh

Van

et al. 2012

Journal of Nanomaterials

View full text Add to dashboard Cite

We report the optical properties of polyvinyl-pyrrolidone (PVP) and the influence of PVP concentration on the photoluminescence spectra of the PVP (PL) coated ZnS : Ni nanocrystalline thin films synthesized by the wet chemical method and spin-coating. PL spectra of samples were clearly showed that the 520 nm luminescence peak position of samples remains unchanged, but their peak intensity changes with PVP concentration. The PVP polymer is emissive with peak maximum at 394 nm with the exciting wavelength of 325 nm. The photoluminescence exciting (PLE) spectrum of PVP recorded at 394 nm emission shows peak maximum at 332 nm. This excitation band is attributed to the electronic transitions in PVP molecular orbitals. The absorption edges of the PVP-coated ZnS : Ni0.3% samples that were shifted towards shorter wavelength with increasing of PVP concentration can be explained by the absorption of PVP in range of 350 nm to 400 nm. While the PVP coating does not affect the microstructure of ZnS : Ni nanomaterial, the analyzed results of the PL, PLE, and time-resolved PL spectra and luminescence decay curves of the PVP and PVP-coated ZnS : Ni samples allow to explain the energy transition process from surface PVP molecules to the Ni2+centers that occurs via hot ZnS.

show abstract

Electrical and optical characteristics of Ni doped ZnS clusters

Cited by 52 publications

References 20 publications

First principles calculations and experimental study of the optical properties of Ni-doped ZnS

First principles calculations and experimental study of the optical properties of Ni-doped ZnS

Preparation and characterization of Mn-doped ZnS nanoparticles

The Effect of Polyvinylpyrrolidone on the Optical Properties of the Ni‐Doped ZnS Nanocrystalline Thin Films Synthesized by Chemical Method

Contact Info

Product

Resources

About