A Role of Growth Potential to Enhance the Physical and Electrical Properties of Electrodeposited Cadmium Sulfide Thin Films

Aparna S. Ukarande1

Sachin V. Desarada1

Maruti V. Salve1

Priyanka U. Londhe1

Dipmala P. Sali1

Shivaji M. Sonawane2

Ganesh R.  Bhand3

Shweta Chaure4

Nandu B. Chaure1,Email

1Department of Physics, Savitribai Phule Pune University, Pune, Maharashtra 411 007, India.
2Department of Physics, Bharatiya Jain Sanghatana’s A. S. & C. College, Pune, Maharashtra 412 207, India.
3Department of Engineering Science, Amrutvahini College of Engineering, Sangamner, Ahmednagar, Maharashtra 422608, India.
4Department of Physics, COEP Technological University, Pune, Maharashtra 411 005, India.

Abstract

We report the growth of cadmium sulfide (CdS) thin films via cost-effective cathodic electrodeposition using a three-electrode configuration in an aqueous electrolyte. The optimal growth potential of CdS was determined using cyclic voltammetry. The influence of growth potentials (-1.2 − -1.4 V) on the optical, structural, morphological, and compositional properties was examined by employing diverse characterization techniques. The results illustrated that the growth potentials significantly affected the crystallographic structure, orientation, and optical measurements. A hexagonal polycrystalline structure with a preferred (101) orientation was observed for the samples deposited at all potentials. The optical direct bandgap of the CdS samples was estimated to be in the range, 2.25 to 2.45 eV, with a transmittance of over 85% for the sample obtained at -1.2 V. CdS thin films obtained by electrodeposition demonstrate superior optical and electrical properties over a large area, thereby providing a promising buffer layer for the development of thin-film solar cell devices.

A Role of Growth Potential to Enhance the Physical and Electrical Properties of Electrodeposited Cadmium Sulfide Thin Films