Nanostructures, surface characterization and optical properties of chemically synthesized CdTe quantum dots
Journal Title: IOSR Journal of Applied Physics (IOSR-JAP) - Year 2018, Vol 10, Issue 6
Abstract
Molar concentrations of chemical ingredients in synthesis of nanocrystals were found significant roles in the structural, surface morphology and visible range optical properties of CdTe quantum dots thin films. XRD, FESEM and UV spectrum analysis revealed that the average particle sizes approach 6-11nm quantum dots with increasing molar concentrations. The study of X-ray line profiles proved that peak intensity was increased with increasing of Cd+2 and Te2- ions in the films. The phase structure of the films were found to possess cubic zinc blend structure with (100), (110), (200), (220) and (321) reflection planes at x = 0.1, 0.2, 0.4 and 0.6M and additional planes were also observed at x = 0.8M. In all the films, (200) reflection plane showed most prominent which facilitated estimation of nanoparticle sizes. The sized dependent nanoparticles showed maximum absorption blue shift near 325nm wavelength in ultraviolet regime ascribed as first excitonic transition. This may be attributed with decreasing particle sizes indicating increasing band gap.
Authors and Affiliations
M. Rasmani Devi1 ,, S. Jogita Devi 2, K. Kunjabali Singh3
Keywords
Related Articles
- EP ID EP432002
- DOI 10.9790/4861-1006022431
- Views 57
- Downloads 0
WIMPs Search require new track
Weakly interacting massive particles (WIMPs) are believe to be most promising dark matter candidates by various groups of theorists and experimentalists working in the field. Search for dark matter become debatable as ti...
Determination of band energy levels of α-quaterthiophene (α-4T) thin films from its optical absorption spectrum
α-4T thin film of various thicknesses are prepared by thermal evaporation method. The absorption spectra of the as-deposited and annealed films are recorded using UV-Vis-NIR spectrophotometer. The dependence of absorptio...
Theoretical Investigation of the Impact of Supernova Explosions on Dynamics of Particle
Dynamics of cosmic ray proton within the supernova was considered by using the equation of the orbit described by the cosmic ray particle when it goes to infinity (at 𝑢 = 0). We considered a certain direction when the co...
The Simplest Realistic Model of Interaction Potentials in Study of Generalized Super Symmetry
A suitable model of interaction potentials can be used in detailed study of generalized supersymmetry using creation and annihilation operators in a quantum mechanics. The study of generalized supersymmetry are used in a...
Evaluation of Carotid Arteries with Colour Doppler Sonography
This study designed to evaluation of carotid arteries with colour doppler sonography, were the data consisted of 130 patients (71 male and 59 female), 11 variable were used to collect the data for each of them they inclu...