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Colloidal growth, characterization and optoelectronic study of strong light absorbent inexpensive iron pyrite nanomaterials by using amine ligands for photovoltaic application

Published online by Cambridge University Press:  08 August 2013

M. Alam Khan ,
Scott A. Little ,
Y. Makablah ,
Scott Mangham ,
S.Y. Lee  and
M. O. Manasreh
M. Alam Khan
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
Scott A. Little
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
Y. Makablah
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
Scott Mangham
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
S.Y. Lee
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
M. O. Manasreh
Affiliation:
Optoelecronic Laboratory, Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, U.S.A.
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Abstract

Highly pure iron pyrites (FeS2) cubic phased nanocrystals of diameter ∼ 20 nm were synthesized by colloidal method using only amines acting both as a coordinating and surfactant ligands. The details of synthetic condition at temperature 175 °C, 215 °C, 230 °C, 245 °C were compared and elucidated. The best synthetic conditions using an octylamine as a ligand at 230 °C for 2h have been optimized in an inert atmosphere. The XRD measurement shows diffraction peaks of pure cubic iron pyrite crystal structure without any detectable presence of marcasite, pyrrotite, greigyte and other impurity structures. The UV-Vis spectra depict clear absorption onset at 1200 nm in best sample with estimated band gap of ∼1.03 eV. These high pure and nanostructures based iron pyrite processed from solution route may offer excellent manufacturing scalability at very low cost since it can be used as inks for large scale fabrication. The morphological and optical characterizations are carried out by using XRD, UV-Vis, and SEM techniques.

Keywords

colloidenergetic materialnanoscale
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1545: Symposium K – Materials for Sustainable Development , 2013 , mrss13-1545-k03-17
Copyright
Copyright © Materials Research Society 2013 

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References

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