1 research outputs found
Efficient Charge Extraction out of Nanoscale Schottky Contacts to CdS Nanowires
Charge recombination dynamics in semiconductor nanostructures
is
of vital importance for photovoltaic or photodetector device applications.
We use local photocurrent measurements to explore spatially separated
drift- and diffusion-currents close to the edge of gold contacts on
top of cadmium sulfide nanowires. By theoretical modeling of the experimental
photocurrent profiles, the electron diffusion length and lifetime
in the wires are obtained to 0.8 μm and 1 ns, respectively.
In contrast to bulk devices, the nanoscale dimensions of the involved
Schottky contacts enable a highly efficient charge carrier extraction
from below the electrodes. This finding paves the way for designing
nanostructured optoelectronic devices of improved performance