期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202006178
关键词
exciton; Hall effect; mobility; organic field‐ effect transistors; organic semiconductors; photoconductivity; photo‐ Hall effect
类别
资金
- National Science Foundation [ECCS-1806363]
- Rutgers Initiative for Materials Research (iMR) seed grant [300761]
- Center for Advanced Soft-Electronics at Pohang University of Science and Technology - Republic of Korea's Ministry of Science, ICT and Future Planning as Global Frontier Project [CASE-2011-0031628]
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.
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.
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