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Title: Effect of thickness on the film properties of spray deposited copper indium sulfide thin films by ultrasonic impact nozzle
Authors: Aydın, E.
Sankır N. D.
Ünver H.
Uluer E.
Keywords: Chalcopyrite semiconductors
Copper indium sulfide
Low cost solar cell
Spray pyrolysis
Thin film solar cells
Issue Date: 2012
Abstract: In this study, copper-indium-sulfide (CuInS2) thin films were deposited on soda lime glass substrates using ultrasonic spray pyrolysis (USP) technique from the aqueous solution of Copper(II)chloride-dehydrate (CuCl2), indium(III)chloride (InCl3) and thiourea (NH2CSNH2). To investigate the effect of film thickness, different solution amounts were sprayed. As expected, the thickness of the films increased with increasing the amount of solution used. It has been obtained that thickness of the CuInS2 absorber layer is critical for structural, morphological and optical properties. Crystal structure of the spray-deposited films was confirmed using X-ray Diffraction (XRD) analysis. The crystallite size of the films was ranging between 12.37 and 26.72 nm. X-ray photoelectron spectroscopy (XPS) study revealed that Cu concentration in the films increased by increasing the solution amount. Surface morphology of the films was investigated via scanning electron microscope (SEM). All sprayed films were defect free. Moreover, Cu rich-island formation was observed on the surface of CuInS2 films sprayed using solutions more than 20 ml. Optical band gap energy of the films decreased from 2.85 to 1.40 eV with increasing the solution amount. As a result, thin films deposited using 30 ml solution was superior to others in terms of structural and optical properties. Moreover, it is very important to mention here that the ultrasonic impact nozzle used in this study enabled using very little amount of solution (0.015 ml/mm2), which is approximately 10 times lower than solution reported previously. This promising result can be the key for large-area manufacturing of CuInS2 based solar cells.
ISSN: 1309-0127
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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