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Development of sprayed CuInS2 thin film absorber for nanostructured solar cell

Published online by Cambridge University Press:  25 October 2012

Atanas Katerski ,
Erki Kärber ,
Malle Krunks ,
Valdek Mikli  and
Arvo Mere
Atanas Katerski
Affiliation:
Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
Erki Kärber
Affiliation:
Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
Malle Krunks
Affiliation:
Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
Valdek Mikli
Affiliation:
Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
Arvo Mere
Affiliation:
Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia
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Abstract

CuInS2 (CIS) films were prepared by chemical spray pyrolysis (CSP) method in air using CuCl2, InCl3 and SC(NH2)2 as precursor materials. The effect of the absorber growth temperature in the interval of 240-350 °C and precursors’ molar ratio in the spray solution on the CIS film properties and ZnO/In2S3/CIS-type CSP-deposited thin film solar cell output characteristics has been studied. CIS films were characterized by XRD and EDX, solar cells were characterized by IV curves in dark and under illumination, and junction barrier height (Φb). The highest Φb of 1170 meV and open circuit voltage (Voc) of 560 mV were recorded for the cell with CIS absorber grown at 250 °C. Increasing the CIS deposition temperature decreases Φb and Voc, makes a component of solar cell photosensitive and increases current density. The precursors’ molar ratio in spray solution becomes relevant at CIS growth temperatures higher than 300 °C as deposition of thiourea-rich solutions suppresses oxide formation in CIS layer and contributes to higher open circuit voltage.

Keywords

spray pyrolysisnanostructurephotovoltaic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1447: Symposium V – Nanostructured and Advanced Materials for Solar-Cell Manufacturing , 2012 , mrss12-1447-w10-47
Copyright
Copyright © Materials Research Society 2012

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