Probing Charge Carrier Movement in Organic Semiconductor Thin Films via Nanowire Conductance Spectroscopy

Abstract

Understanding movement of charge carriers within organic semiconductor films is crucial for applications in photovoltaics and flexible electronics. This study theoretically investigates the use silicon nanowires for probing spatial and temporal distribution of charge carriers in organic thin films and estimates the sensitivity of electrical conductance of silicon nanowires to changes of charge states within an organic semiconductor physisorbed on the surface of the nanowire. Elastic scattering caused by motion of charge carriers near the nanowire modifies the mean-free path for backscattering of electrons propagating within it, which we have mathematically expressed in terms of the causal Gr..