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Title: Structural and optical properties of ZnO: K synthesized by sol-gel auto-combustion route

The structural and optical behavior of ZnO and ZnO doped with K synthesized by solution combustion route is reported in this article. The XRD patterns confirm the substitution of K atoms into ZnO lattice. There are no secondary peaks observed in the XRD patterns. The band gap of the K doped samples show a red shift on comparison with the bandgap of ZnO. The photoluminescence spectral study discloses the quenching behavior of UV emission and the aggrandizing blue emission when K content increases. The rich presence of defects is confirmed from the optical analysis and a practical mechanism, involving Zn{sub i} for the origin of the blue emission in ZnO is discussed here.
Authors:
; ; ;  [1]
  1. Condensed Matter Laboratory, Department of Physics, Madras Institute of Technology, Anna University, Chrompet, Chennai-600044 (India)
Publication Date:
OSTI Identifier:
22490529
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMS; COMPARATIVE EVALUATIONS; DOPED MATERIALS; EMISSION SPECTRA; EMISSION SPECTROSCOPY; ENERGY GAP; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; POTASSIUM; QUENCHING; RED SHIFT; SOL-GEL PROCESS; ULTRAVIOLET RADIATION; ULTRAVIOLET SPECTRA; X-RAY DIFFRACTION; ZINC OXIDES