Investigation of Structural and Spectroscopic Properties of Nanostructured CdS Films

Iron (Fe) doped Zinc Oxide (ZnO) nanoparticle is a very important topic of study in the field of nanoscience and nanotechnology. We have prepared Iron doped ZnO nanoparticles by Wet chemical method. We report the optical properties of Iron (Fe) doped ZnO nanoparticles at different molarities (0.025M, 0.05M and 0.1M). The band gaps of all nanoparticles prepared at different molarities are calculated with the intercept on Y-axis of Tauc plot from UV absorption spectra using UV-Vis Absorption spectroscopy. It has been observed that band gap decreases as the molarity increases. At 0.025M, 0.05M and 0.1M band gap are found to be 4.9eV, 4.89eV and 2.7eV respectively. This reduction in band gap suggest that the band gap of prepared nanoparticles are shifted towards lower energy. This shifting in band gap the blue region gives the idea of blue shift quite well. This blue shift is dependent on the particle size of the nanoparticles.

Section: Characterisation Methodsmentioning

confidence: 99%

“…The increase in band gap at 0.025M is due to the substitution of Zn 2+ ions by Fe 3+ ions which create additional free carriers moving the Fermi level towards the conduction band [10].…”

Section: Characterisation Methodsmentioning

confidence: 99%

Study of blue shift in Iron (Fe) doped ZnO Nanoparticles at different Molarities by Wet Chemical Method

Kalita¹,

Karmakar²

2019

“…From Full Width at Half Maximum (FWHM) of the foremost intense peak, the particle length has been estimated the usage of Debye-Scherer's rule [18]: D = Wherein λ = 0.1541 nm is the wavelength of X-ray diffraction, β is the FWHM in radian of the most intense XRD peak and θ is the angle of diffraction. The particle size for ZnS nanoparticles as calculated is determined to be 4.7 nm.…”

Section: Figure 1: Xrd Pattern Of Zns Nanoparticlesmentioning

confidence: 99%

Structural and Optical Performance of ZnS Nanoparticles Synthesized via Chemical Route.

Ramteke¹,

Lanje²,

Pimpalshende³

2018

In this analysis, ZnS nanoparticles have been synthesized employing an easy chemical co-precipitation route using metal precursors and DMF (CH 3 ) 2 NC(O)H as a stabilizing agent. The obtained ZnS nanoparticles have been characterized through XRD, TEM, UV-Vis, FTIR and PL measurements. The foremost intense broad peaks in the diffraction outline reveal the crystalline character of the prepared material with the particle length is approximately 4.7 nm. The optical band gap has been evaluated from the UV-Vis. absorption spectrum which is found to be about 3.95 eV. The blue swing in absorption spectra validates the formation of nanoparticles. Further, the TEM micrograph revealing the ZnS particles are in nano dimension. FTIR study has been carried out for the bond evaluation. The PL measurement shows the emission of colour in the blue area.

“…The information of optical absorbance and band gap energy of a material predicts the area in which it can be used. The optical band gap energy (E g ) is calculated by using Tauc's formula [27] ⁄ Where is the absorption co-efficient, h is the incident photon energy, A is a constant. For direct band gap material, n=1/2.…”

Section: B Optical Absorption Analysismentioning

confidence: 99%

Effect of molarity variation on band gap of CuO Nanostructures Synthesized by wet chemical method

Kalita¹,

Karmakar²

2018

The wet chemical method has been implemented to synthesize CuO nanostructures at 100 0 C. The monoclinic phase structure of CuO nanostructures has been affirmed by X-ray Diffraction (XRD) pattern. Crystal size and dislocation density of the nanostructures have been calculated from XRD data. UV-visible absorption spectra have been used to estimate band gap of the prepared CuO nanostructures. The refractive index and dielectric constant of CuO nanostructures have been calculated from band gap which shows an increase with the decrease of the band gap. Field Emission Scanning Electron Microscopy (FESEM) has been used to inspect the crystals' surface morphology.