EFFECTS OF Co CONCENTRATION ON THE STRUCTURAL AND OPTICAL PROPERTIES OF Zn1−xCoxS FILMS

Shufeng Li, Li Wang, Xueqiong Su (), Yong Pang (), Dongwen Gao () and Xiaowei Han ()
Additional contact information
Shufeng Li: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China†Fundament Department, Chinese People’s Police University, Langfang 065000, P. R. China
Li Wang: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China
Xueqiong Su: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China
Yong Pang: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China
Dongwen Gao: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China
Xiaowei Han: College of Applied Sciences, Beijing University of Technology, Beijing 100124, P. R. China

Surface Review and Letters (SRL), 2020, vol. 27, issue 08, 1-10

Abstract: Amorphous and crystalline Zn1−xCoxS (x=0.1, 0.3, 0.5) thin films were grown on sapphire (Al2O3) substrates by pulsed laser deposition at substrate temperature of 25∘C and 800∘C, respectively. The X-ray diffraction results show that the crystalline film has a cubic zinc blende structure and the crystalline quality decreased with increasing Co-doping concentration. The X-ray diffraction and X-ray photoelectron spectroscopy spectra reveal that the samples reached an overdoping state at Co-doping concentration of x=0.5. The absorbance of films increases and the absorption edge shifts to longer wave length direction with increasing Co-doping concentration. The redshift of the band gap energy depends on the Co composition associating with the Urbach energy. Furthermore, the refractive index and dielectric constant increase with increasing Co-doping concentration. The dispersion parameters, such as dispersion energy (Ed), oscillator energy (Eo), static refractive index (n0), static dielectric constant (ϵ0), interband transition strength moments (M−1 and M−3), oscillator strength So and oscillator wavelength λo, have been analyzed by Wemple–DiDomenico single oscillator model. All these parameters were found to be dependent upon the Co-doping concentration in the Zn1−xCoxS thin films.

Keywords: Zn1−xCoxS; PLD; thin film; structural; optical properties (search for similar items in EconPapers)
Date: 2020
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X19501968
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:27:y:2020:i:08:n:s0218625x19501968

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X19501968

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().