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Effect of Cu Doping on Structural and Optical Properties of ZnO Nanoparticles Using Sol–Gel Method
Author(s) -
Kumbhar Deepak,
Kumbhar Sarita,
Salunke Govind,
Nalawade Rekha,
Nalawade Avinash
Publication year - 2019
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201800192
Subject(s) - wurtzite crystal structure , materials science , crystallite , doping , band gap , scanning electron microscope , impurity , analytical chemistry (journal) , nanoparticle , spectroscopy , absorption spectroscopy , nanotechnology , optoelectronics , zinc , optics , chemistry , composite material , metallurgy , physics , organic chemistry , chromatography , quantum mechanics
ZnO has large exciton binding energy (60 meV) and wide direct band gap (3.37 eV). It is a promising base materials for optoelectronics applications. To optimize its optical properties, Cu doped ZnO is synthesized by low cost sol–gel method and analyzed by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and UV–vis spectroscopy. The XRD analysis reveals that the samples are polycrystalline with hexagonal wurtzite structure. It also indicates that there is no impurity peaks present in prepared samples and shows that the samples are stoichiometric. SEM images of Cu doping exhibit a slight variation in grain size. In addition, the absorption spectrum of pure and Cu doped ZnO nanoparticles (NPs) are studied and Tauc plots show band gap narrowing effect on Cu doping concentration to use it as advance material in diiferent devices.