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Abstract

This paper focuses on photoconductivity and electroluminescence studies
on individual single-wall carbon nanotubes (SWCNTs) that are
incorporated into nanoscale electrical devices. It describes how the
spatial dependence of these signals has been utilized to gain valuable
information about the local electronic structure and the charge
transport properties of the nanotubes. Moreover, we present a summary
of available experimental data supporting theoretical predictions, that
excitonic effects dominate the optical absorption and emission of
semiconducting SWCNTs. Finally, an outline of the emerging field of
SWCNT-based photovoltaic devices is given, followed by an outlook into
the future perspective of carbon nanotube optoelectronics.