The photo-hall effect in high-mobility organic semiconductors (Conference Presentation)

Abstract

Photogeneration and transport of mobile photocarriers in high-mobility crystalline organic semiconductors remain underexplored. The photo-Hall effect was used to address the fundamental charge transport properties of these functional molecular materials, without the need for fabricating complex transistor devices or chemical doping. Here we demonstrate a photo-Hall effect in organic semiconductors, using a benchmark molecular system rubrene as an experimental platform. We show that this technique can be used to directly measure the charge carrier mobility and photocarrier density, disentangle the surface and bulk transport phenomena, as well as deepen our understanding of the mechanism of photoconductivity in these high-performance materials.