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Excitons in Low-Dimensional Systems: Conjugated Polymers and Semiconductor Surfaces

Published online by Cambridge University Press:  15 February 2011

Michael Rohlfing
Michael Rohlfing*
Affiliation:
Institut für Theoretische Physik II, Universität Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany
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Abstract

We investigate the formation of excitons in low-dimensional semiconducting systems. To this end a recently developed ab initio approach is employed to determine the excitation energies and optical transition matrix elements of bound and unbound excitonic states. From these results the optical spectrum can be evaluated. We discuss two classes of low- dimensional prototype materials: conjugated polymers and a semiconductor surface. Due to the reduced dimensionality, the excitonic binding energies are much larger than in con- ventional semiconductors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 579: Symposium B – The Optical Properties of Materials , 1999 , 47
Copyright
Copyright © Materials Research Society 2000

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References

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