Effect of Dye Extracts on the Optical Properties of Chemically Deposited ZnS Thin Films

P. A. Nwofe

doi:10.12816/0044608

Article Details

Effect of Dye Extracts on the Optical Properties of Chemically Deposited ZnS Thin Films

Authors:

P. A. Nwofe

Publisher:

University of Oum El-Bouaghi

Main Topics:

Physics

Journal:

Journal of New Technology and Materials 2017 Vol.7 Issue 2, pp.93-99

Document Type:

Article

Publication Date:

12/2017

Document Language:

English

Document ID (Org No.):

113730

Frequency:

Bi-Annual

pISSN:

2170161X

DOI:

10.12816/0044608

Descriptors:

Keywords:

Abstract:

 The study reports on the influence of dye extracts of Naulcea latifolia (Uvuru-ilu) leaves on the optical properties of Zinc Sulphide (ZnS) thin films grown by the chemical bath deposition method. The concentration of the ZnS thin films were varied in the range 0.1 M to 0.7 M and other deposition variables (pH, and bath temperature) were kept constant. The films were characterised using optical spectroscopy (transmittance versus wavelength, reflectance versus wavelength, absorbance versus wavelength) to investigate the optical constants (optical absorption coefficient, energy bandgap, extinction coefficient and the optical density). The results show that the transmittances of the dye –sensitized films were higher compared to the as-deposited layers. The transmittance exhibited a concentration dependent behaviour for films grown without addition of the dye extracts. The transmittance were typically < 50 % for the non dye-sensitized ZnS thin films grown at concentrations ≤ 0.3 M and > 50 % for films grown at concentrations ≥ 0.5 M. However the presence of the dye extracts increased the transmittances significantly, independent of the different concentrations used. The energy bandgap was direct, with values ≤ 3.60 eV for films grown at concentrations ≥ 0.5 M and 3.80 eV for films grown at lower concentrations. These values strongly suggest the use of these films in optoelectronic applications and related device designs.

Article Details

Effect of Dye Extracts on the Optical Properties of Chemically Deposited ZnS Thin Films

Authors:

P. A. Nwofe

Publisher:

University of Oum El-Bouaghi

Main Topics:

Physics

Journal:

Journal of New Technology and Materials 2017 Vol.7 Issue 2, pp.93-99

Document Type:

Article

Publication Date:

12/2017

Document Language:

English

Document ID (Org No.):

113730

Frequency:

Bi-Annual

pISSN:

2170161X

DOI:

10.12816/0044608

Descriptors:

DYES

OPTICAL PROPERTIES

THIN FILMS

TRANSMITTANCE

WAVELENGTH

Transmittance

Dye Extracts

Naulcea Latifolia (Uvuru-Ilu)

Concentrations

Optical Constants

Issues

Article Details

Authors: P. A. Nwofe

Publisher: University of Oum El-Bouaghi

Main Topics: Physics

Journal: Journal of New Technology and Materials 2017 Vol.7 Issue 2, pp.93-99

Document Type: Article

Publication Date: 12/2017

Document Language: English

Document ID (Org No.): 113730

Frequency: Bi-Annual

pISSN: 2170161X

DOI: 10.12816/0044608

Descriptors:

Issues

Authors:

P. A. Nwofe

Publisher:

University of Oum El-Bouaghi

Main Topics:

Physics

Journal:

Journal of New Technology and Materials 2017 Vol.7 Issue 2, pp.93-99

Document Type:

Article

Publication Date:

12/2017

Document Language:

English

Document ID (Org No.):

113730

Frequency:

Bi-Annual

pISSN:

2170161X

DOI:

10.12816/0044608