Mobility of photo-injected carriers in dye-sensitized solar cell
Abstract
This work focuses on the mobility of electrons once it's injected into the
conduction band of Ti02 in an open circuit conditions. The three possible
back reaction pathways namely via substrates, surface states and
conduction band have been discussed. The current models being used to
describe carrier transport in semiconductor devices have been adapted for
this work. To improve our understandings on the mobility of electrons in the
dye sensitized solar cell, this work focuses specifically on two aspects
expected to influence the mobility of electrons properties; these are
temperature and photon flux. Due to lack of time it was not possible to carry
out computer simulation of the equations. However the approach was purely
analytical. The back reaction via the substrate is dominant at low
temperatures while the electron losses via the conduction band and the
surface states have been noticed to be dependent on the thickness of Ti02
particles.
Citation
Masters of Science in School of Physical Sciences,Publisher
University of Nairobi School of Physical Sciences