Ultrafast Charge Transfer Dynamics at the Origin of Photoconductivity in Doped Organic Solids.

ABSTRACT: In spite of their growing importance for optoelectronic devices, the fundamental properties and photophysics of molecularly doped organic solids remain poorly understood. Such doping typically leads to a small fraction of free conductive charges, with most electronic carriers remaining Coulombically bound to the ionized dopant. Recently, we have reported photocurrent for devices containing vacuum-deposited TAPC (1,1-bis(4-bis(4-methylphenyl)aminophenyl)cyclohexane) doped with MoO₃, showing that photoexcitation of charged TAPC molecules increases the concentration of free holes that contribute to conduction. Here, we elucidate the excited-state dynamics of such doped TAPC films to unravel the key mechanisms responsible for this effect. We demonstrate that excitation of different

SUBMITTER: Tsokkou D 

PROVIDER: S-EPMC8040020 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature