  Photocurrent spectroscopy is a versatile technique to identify and understand
the optoelectronic dynamics occurring in semiconductor nanowires. Conventional
photocurrent spectroscopy allows to explore the morphology and material
properties of nanowires as well as their contact interfaces. Using
time-resolved photocurrent spectroscopy one gets additional information on the
multiple photocurrent generation mechanisms and their respective timescales.
This chapter discusses various aspects of the photocurrent spectroscopy and it
summarizes the physical mechanisms behind the photocurrent and photoconductance
effects in semiconductor nanowires.
