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MORPHOLOGICAL CHANGE IN Cu-DOPED ZnO FROM ROD-LIKE TO FLOWERS-LIKE NANOSTRUCTURES: A VITAL ROLE FOR THE OPTICAL BAND GAP TUNING

S. Naseem Shah, M. Naeem, S. Rizwan Ali, S. Mahmood, S. Imran Ali, Yasmeen Bibi, S. Masood Raza and Najam Ul Hassan
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S. Naseem Shah: Department of Physics, University of Karachi, Karachi, Pakistan
M. Naeem: #x2020;Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
S. Rizwan Ali: #x2020;Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
S. Mahmood: Department of Physics, University of Karachi, Karachi, Pakistan
S. Imran Ali: #x2021;Department of Applied Chemistry and Chemical Technology, University of Karachi, Karachi, Pakistan
Yasmeen Bibi: #xA7;Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
S. Masood Raza: #x2020;Department of Physics, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
Najam Ul Hassan: #xB6;School of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue Supp01, 1-8

Abstract: We demonstrate a morphological change in Zn1-xCuxO (x= 0–5%) samples from rod-like (x≤ 2%) to flower-like (x> 2%) with increasing Cu concentration. This effect is attributed to Cu induced change in the ZnO growth mode from one-dimensional (forming rod-like) to two-dimensional (forming flower-like) structures. The optical properties of the samples were also found to be well correlated with the observed morphological changes in the samples. Optical bandgap decreases with increasing x, exhibiting a minimum (2.88eV) at x= 2% and afterwards it increases slightly up to 3.00eV for x= 5%. Our results show an intriguing possibility of bandgap tuning by the sample morphology.

Keywords: Nanostructures; chemical synthesis; Cu doping; morphology; optical property (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X18500014

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