Title
Structural and optical properties of ZnO doped CdTe nanopowders for optoelectronic device application
Year
2020
Journal
Optik
Abstract
The enthusiasm on the various properties of photonic CdTe material is of extensive use because of its innovative applications in optoelectronics, flat-panel displays, nonlinear optical devices, light-emitting diodes and luminescence devices. ZnO doped CdTe nanopowders were synthesized by co-precipitation process. XRD pattern of samples showed extra peaks at 74.5° and 83.4° related to diffraction from (210) and (311) planes of the CdTe cubic stage. SEM images of the CdTe surfaces are calibrated at 2.5 and 2.2 nm. These samples with 10 min reflux time demonstrated round particles with a normal size of 60 nm. From the micrograph, it is seen that after further increment in time, the molecule size width continued developing from 50 to 85 nm. From the investigation of optical spectra, the refraction and assimilation coefficient have been determined. The refraction of the CdTe nanopowder was like that of the single crystal, with varieties inside + 0.12 and - 0.17 in connection to the single crystal. The hyperfine structure essence might be observed from the state of the reverberation at g1 = 5.1 which presents more extensive sidebands for the sample prepared at1500 K. The excitation peaks were observed at 643 and 650 nm excitation wavelengths for the samples which are annealed at 1000 and 1500 K revealing that the optical luminescence was observed in green and blue regions. From the outcome of the results it can be concluded that the prepared nanopowders can be utilized in optoelectronic device applications.
Instrument
V-670
Keywords
Absorption, Nanostructures, Film thickness, Band gap, Optical properties, Materials