Visible-Pump Terahertz Probe Measurements of Embedded Polymer Conductivity in Organic Matrices.

ABSTRACT: We report measurements of ultrafast photoinduced charge separation and recombination processes in the conjugated donor-acceptor (D-A) polymer PSBTBT, both as pure film and blended in various polymer matrices. Using time-resolved terahertz spectroscopy (TRTS), time-dependent photoconductivity is measured for samples with PSBTBT weight fractions (W_PSBTBT:W_PE/PEG/PS) of 2.0% dispersed in high-density polyethylene (HDPE), polyethylene glycol (PEG), and polystyrene (PS). Charge carrier generation is an intrinsic feature of conductive polymers that occurs on sub-picosecond and longer timescales and is attributed to initially generated dissociation of bound polaron pairs into free carriers that reside on polymer chains, or to adjacent interchain charge transfer and mi

SUBMITTER: Varner C 

PROVIDER: S-EPMC12693946 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature