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The Photo‐Hall Effect in High‐Mobility Organic Semiconductors
Author(s) -
Bruevich Vladimir,
Choi Hyun Ho,
Podzorov Vitaly
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202006178
Subject(s) - rubrene , materials science , organic semiconductor , semiconductor , electron mobility , optoelectronics , photoconductivity , charge carrier , hall effect , doping , transistor , nanotechnology , electrical resistivity and conductivity , electrical engineering , voltage , engineering
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.