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Cu ions induced reorientation of crystallite in ZnO nano/micro rod arrays thin films
Affiliation:1. School of Physics, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India;2. Department of Physics and Nanotechnology, SRM University, Chennai 603203, Tamil Nadu, India;1. Laboratoire d''Etude des Matériaux Avancés et Applications (LEM2A), Université Moulay Ismaïl, FSM-FPE-ESTM, BP 11201 Zitoune, Meknes, Morocco;2. Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, Montpellier F-34095, France;1. School of Civil Engineering, Shandong University, Jinan 250061, China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, China;3. School of Mechanical Engineering, Shandong University, Jinan 250061, China;1. Photonics-Electronics Group, Aras International Campus, University of Tabriz, Tabriz, Iran;2. Photonics-Electronics Group, Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz 51665-163, Iran;3. School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Crawley, WA 6009, Australia;1. Department of Physics, University of Guilan, Rasht, Iran;2. Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108 Vilnius, Lithuania
Abstract:Undoped and Cu doped ZnO nano/microrod arrays (N/MRAs) films were grown on seeded glass substrates by chemical bath deposition technique. The structural and morphological characterizations (X-ray diffraction and scanning electron microscopy) clearly illustrate that the pure ZnO N/MRAs has well-defined hexagonal prismatic cross-sectional crystallographic facets and its crystallographic plane is more vertically grown along (002) crystallographic direction. The horizontally aligned (100) crystallographic plane is induced at 20% Cu doping level. Morphological structure of ZnO N/MRAs changed into nanoplates/microballs with increasing of Cu doping level. Hexagonal crystal structure of undoped and Cu doped ZnO N/MRAs is then confirmed by µ-Raman scattering. Energy band gaps are found to be decreased with Cu doping and reached a minimum of 3.04 eV when doping level is 20%. The defect related peak intensity is suppressed in ZnO N/MRAs by Cu doping.
Keywords:Atomic force microscopy  Doping  Crystal morphology  Zinc compounds  Nonlinear optic materials
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