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Chalcogenide Glass Thin Films for Nanodipole Junctionless Photovoltaics

Published online by Cambridge University Press:  18 August 2011

Sakina Junaghadwala ,
Daniel G. Georgiev ,
Victor G. Karpov ,
Rossen Todorov  and
Nanke Jiang
Sakina Junaghadwala
Affiliation:
Department of Electrical Engineering and Computer Science, University of Toledo, Toledo, OH 43606, U.S.A.
Daniel G. Georgiev
Affiliation:
Department of Electrical Engineering and Computer Science, University of Toledo, Toledo, OH 43606, U.S.A.
Victor G. Karpov
Affiliation:
Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, U.S.A.
Rossen Todorov
Affiliation:
Institute of Optical Materials and Technologies “Acad. J. Malinowski”, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl.109, 1113 Sofia, Bulgaria
Nanke Jiang
Affiliation:
Department of Electrical Engineering and Computer Science, University of Toledo, Toledo, OH 43606, U.S.A.
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Abstract

We examine the potential of Bi-Ge-Se chalcogenide glass films as materials for a new type of photovoltaic devices, referred to as junctionless nanodipole PV. Glasses of a chemical composition providing a significant optical absorption were synthesized in quartz ampoules from high-purity Bi, Ge, and Se elements by a conventional melt quenching technique. This material was then used to deposit thin films with different thicknesses on various substrates by thermal evaporation under high-vacuum conditions. The original bulk glasses and the films were characterized by electron microscopy with EDS, XRD, Raman spectroscopy, differential scanning calorimetry, and spectrophotometry. Open-circuit voltage (Voc) readings under incandescent illumination were obtained from the as-deposited and annealed films. Results from this characterization work are presented and discussed. Although the efficiency of nanodipole PV material structures, based on this material remains of no practical interest, our initial results indicate a possible path for the implementation of the nanodipole PV concept.

Keywords

amorphousannealingphotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1322: Symposium B – Third-Generation and Emerging Solar-Cell Technologies , 2011 , mrss11-1322-b08-14
Copyright
Copyright © Materials Research Society 2011

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References

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