Effect of Co Doping Concentration on Structural Properties and Optical Parameters of Co-Doped ZnO Thin Films by Sol-Gel Dip-Coating Method

Title
Effect of Co Doping Concentration on Structural Properties and Optical Parameters of Co-Doped ZnO Thin Films by Sol-Gel Dip-Coating Method
Author(s)
김종수Giwoong Nam[Giwoong Nam]Hyunsik Yoon[Hyunsik Yoon]Byunggu Kim[Byunggu Kim]Dong-Yul Lee[Dong-Yul Lee]Jae-Young Leem[Jae-Young Leem]
Keywords
GROWTH; CELLS
Issue Date
201411
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.14, no.11, pp.8544 - 8548
Abstract
The structural and optical properties of Co-doped ZnO thin films prepared by a sol-gel dip-coating method were investigated. X-ray diffraction analysis showed that the thin films were grown with a c-axis preferred orientation. The position of the (002) peak was almost the same in all samples, irrespective of the Co concentration. It is thus clear that Co doping had little effect on the position of the (002) peak. To confirm that Co2+ was substituted for Zn2+ in the wurtzite structure, optical measurements were conducted at room temperature by a UV-visible spectrometer. Three absorption peaks are apparent in the Co-doped ZnO thin films that do not appear for the undoped ZnO thin film. As the Co concentration was increased, absorption related to characteristic Co2+ transitions increased because three absorption band intensities and the area underneath the absorption wells between 500 and 700 nm increased with increasing Co concentration. The optical band gap and static dielectric constant decreased and the Urbach energy and extinction coefficient increased with increasing Co concentration.
URI
http://hdl.handle.net/YU.REPOSITORY/30459http://dx.doi.org/10.1166/jnn.2014.9982
ISSN
1533-4880
Appears in Collections:
이과대학 > 물리학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE