London, England, United Kingdom
A Summer research placement I completed supervised by Jenny Nelson in the Experimental Solid State Physics Group. The organic semiconductor molecule IDTBT exhibits incredibly large hole mobilities for an organic semiconductor and so is a substance of interest for use in organic photovoltaics. As part of the placement I investigated the charge transport properties of IDTB(X) samples to attempt to understand how varying molecule substructure can affect hole mobility. A Time of Flight method was used to measure current profiles by pulsing samples with a Class 4 laser that I independently operated. This was accompanied by a Drift/Diffusion charge transport model that I developed using python and compared to the datasets to better understand the reaction of current profiles for sub laser pulse width transport.