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- W2324178605 abstract "We discuss the determination of concentration-dependent carrier mobility by measurement of current and charge injection in a conjugated polyelectrolyte thin film. Equilibration under bias of the mobile counterions in a cationically functionalized polyacetylene film leads to steady-state current, while total charge injection is measured through NIR absorbance spectroscopy. The charge–voltage behavior is consistent with a model of charge injection where migration of mobile ions enables injection of electronic carriers in a manner analogous to electrochemical doping, and current is limited by diffusion across the bulk. The relation between injected charge and current density is also used to obtain the functional form of the concentration dependence of mobility, and this in turn is used to model the carrier profile across the film and obtain the mobility μ = 2.8 × 10–10 + 1.6 × 10–8(c/C0)1.3 cm2/(V s) where C0 is a reference concentration of 1 C/cm3. Another method of charge quantification, integration of transient short-circuit current, is investigated and found to serve as an approximation of charge density, though it overestimates at low injection levels and underestimates at higher levels." @default.
- W2324178605 created "2016-06-24" @default.
- W2324178605 creator A5024317744 @default.
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- W2324178605 date "2013-07-12" @default.
- W2324178605 modified "2023-09-25" @default.
- W2324178605 title "Characterizing Charge Injection, Transport, and Mobility in a Conjugated Polyelectrolyte by NIR Absorbance" @default.
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- W2324178605 doi "https://doi.org/10.1021/jp402146d" @default.
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