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Substrate temperature dependent studies on properties of chemical spray pyrolysis deposited CdS thin films for solar cell applications

Diwate, Kiran, Pawbake, Amit, Rondiya, Sachin, Kulkarni, Rupali, Waykar, Ravi, Jadhavar, Ashok, Rokade, Avinash, Funde, Adinath, Mohite, Kakasaheb, Shinde, Manish, Pathan, Habib, Devan, Rupesh and Jadkar, Sandesh 2016. Substrate temperature dependent studies on properties of chemical spray pyrolysis deposited CdS thin films for solar cell applications. Journal of Semiconductors 38 (2) , 023001. 10.1088/1674-4926/38/2/023001

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Abstract

Thin films of CdS have been prepared by chemical spray pyrolysis by spraying precursor solution directly onto soda lime glass (SLG) substrates. Influence of substrate temperature on structural, optical, morphological and electrical properties have been investigated by using various techniques such as low angle X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), UV–visible spectroscopy photoluminescence (PL) spectroscopy etc. Formation of CdS has been confirmed by low angle XRD, Raman spectroscopy and XPS analysis. XRD pattern showed that CdS films are polycrystalline, have hexagonal structure and prefer orientation of crystallites shifts from (101) to (002) with increase in substrate temperature. Raman spectroscopy revealed that exciton-phonon coupling depends on substrate temperature and hence on crystallite size. Optical band gap increased from 2.43 to 2.99 eV when substrate temperature increased from 325 to $475\,^\circ {\rm{C}}$. Transmittance of the film also showed an increasing trend from $\sim 52 \% $ to $\sim 80 \% $ with increase in substrate temperature. Such high band gap and transmittance values of CdS films prepared at $475\,^\circ {\rm{C}}$ make it a useful window material in CdS/CdTe and CdS/Cu2S heterojunction solar cells.

Item Type: Article
Date Type: Submission
Status: Published
Schools: Chemistry
Publisher: IOP Publishing
ISSN: 1674-4926
Last Modified: 14 Jul 2020 14:15
URI: http://orca-mwe.cf.ac.uk/id/eprint/133267

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