Delocalization Enhances Conductivity at High Doping Concentrations

نویسندگان

چکیده

Many applications of organic semiconductors require high electrical conductivities and hence doping levels. Therefore, it is indispensable for effective material design to have an accurate understanding the underlying transport mechanisms in this regime. In study, own literature experimental data that reveal a power-law relation between conductivity charge density strongly p-doped conjugated polymers are combined. This behavior cannot consistently be described with conventional models energetically disordered materials. Here, shown observations can explained terms variable range hopping model energy-dependent localization length. A tight-binding used quantitatively estimate length, which analytical model. limit low densities, reproduces well-known Mott behavior, while experimentally observed superlinear increase reproduced. The latter occurs when Fermi level reaches partially delocalized states. insight anticipated lead new strategies semiconductors.

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ژورنال

عنوان ژورنال: Advanced Functional Materials

سال: 2022

ISSN: ['1616-301X', '1616-3028']

DOI: https://doi.org/10.1002/adfm.202112262