resumo
Zn1-xNixO nanopowders with different Ni contents of x = 0.0, 0.04 and 0.08 were synthesized via cost effective sonochemical reaction method. X-ray diffraction (XRD) pattern reveals pure wurtzite phase of prepared nanostructures with no additional impurity peaks. The morphology and dimensions of nanoparticles were investigated using scanning electron microscope (SEM). A sharp and strong peak for first order optical mode for wurtzite zinc oxide (ZnO) structure was observed at similar to 438 cm(-1) in Raman spectra. The calculated optical band gap (E-g) from UV-vis transmission data was found to decrease with increase in Ni content. The observed red shift in E-g with increasing Ni content in ZnO nanopowders were in agreement with band gap behaviours found in their photoluminescence (PL) spectra. The synthesised ZnO nanopowders with controlled band gap on Ni doping reveals their potential for use in various electronic and optical device applications. The results were discussed in detail. (C) 2015 Elsevier Ltd. All rights reserved.
palavras-chave
DOPED ZNO NANOPARTICLES; NANOCOMPOSITE THIN-FILMS; SPRAY-PYROLYSIS; SONOCHEMICAL SYNTHESIS; ELECTRICAL-PROPERTIES; DIELECTRIC-PROPERTIES; ELECTRONIC-STRUCTURE; NANOSTRUCTURES; TRANSPARENT; NANORODS
categoria
Materials Science
autores
Singh, B; Kaushal, A; Bdikin, I; Saravanan, KV; Ferreira, JMF
nossos autores
Ajay Kaushal
Bolseiro de pós-Doutoramento
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)agradecimentos
Authors, Budhendra Singh and Ajay Kaushal would like to thank Fundacao para a Ciencia e a Tecnologia for the financial support (Funded by NSRF-POPH) under the grant nos. SFRH/BPD/76184/2011and SFRH/BPD/77598/2011, respectively. Authors are also thankful to Dr. Suresh Kumar Jakka from Department of Physics, University of Aveiro for PL measurement of prepared samples.