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Int. J. Electroactive Mater. 7 (2019) 1-6

A Comparative Assessment: Chemical Bath Deposited and Electrodeposited CdS Films

Chathuranga Kumarage1*, R.P. Wijesunder2, N Kaur3, D. Zappa3, V.A. Seneviratne4, C.P. Jayalath4, B.S. Dassanayake4

1University of Peradeniya, Peradeniya, Central, Sri Lanka
2Physics, University of Kelaniya, Kelaniya, Western, Sri Lanka
3Department of Information Engineering, University of Brescia, Brescia, Brescia, Italy
4Physics, University of Peradeniya, Peradeniya, Central, Sri Lanka

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Abstract : Cadmium sulphide (CdS) thin films as the window material for solar cells were fabricated by two deposition procedures; chemical bath deposition (CBD) and electrodeposition (ED). The grazing incident x-ray diffraction (GIXRD) analysis shows that the fabricated electrodeposited CdS (ED-CdS) and chemical bath deposited CdS (CBD-CdS) are predominantly hexagonal. The scanning electron microscope (SEM) images of the ED-CdS films indicate the existence of spherical features with various sizes. The ED-CdS film surfaces indicate more uniform coagulates compared to that of CBD-CdS. Photoelectrochemical (PEC) cell studies indicate that CdS materials grown by CBD and ED techniques are all n-type. Additionally, higher short circuit (ISC) current and flat band potential (Vfb) were observed for ED-CdS films compared to CBD-CdS. The results suggest superior electrical properties of ED-CdS compared to CBD-CdS.

Keywords : CBD,ED,CdS,GIXR