The Photo-Hall Effect in High-Mobility Organic Semiconductors

High-mobility crystalline organic semiconductors are important for applications in advanced organic electronics and photonics. Photogeneration and transport of mobile photocarriers in these materials, although very important, remain underexplored. The photo-Hall effect can be 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, a photo-Hall effect is demonstrated in organic semiconductors, using a benchmark molecular system rubrene as an experimental platform. It is shown that this technique can be used to directly measure the charge carrier mobility and photocarrier density, decouple the surface and bulk transport phenomena, and thus significantly deepen the understanding of the mechanism of photoconductivity in these high-performance molecular materials.

Automated summary

Research on the photo-Hall effect in organic semiconductors using a rubrene molecular system as an experimental platform has shown direct measurement of charge carrier mobility and photocarrier density, decoupling the surface and bulk transport phenomena, and deepening the understanding of the mechanism of photoconductivity in high-performance molecular materials.