Gate-voltage-dependent ionic diffusion and transient dynamics in organic electrochemical transistors
[EN] Organic electrochemical transistors (OECTs) exhibit transient current responses governed by the interplay between ionic motion and electronic transport in the polymer channel. In this work, transient behaviours of PEDOT:PSS OECTs are investigated under a step change in gate voltage. The gate cu...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/231557 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/231557 |
| Access Level: | acceso abierto |
| Palabra clave: | Organic electrochemical transistors PEDOT:PSS Ionic diffusion Electronic transport Transient response Mixed ionic electronic conductors |
| Sumario: | [EN] Organic electrochemical transistors (OECTs) exhibit transient current responses governed by the interplay between ionic motion and electronic transport in the polymer channel. In this work, transient behaviours of PEDOT:PSS OECTs are investigated under a step change in gate voltage. The gate current consistently decays exponentially across different drain biases, allowing extraction of the ionic diffusion time constant tau d via comparison with an analytical model. In contrast, drain current transients show bias-and polarity-dependent temporal profiles, reflecting the modulation of lateral transit of electronic carriers by the drain-source potential. Despite these variations, the extracted decay constants remain consistent with those from gate-current analysis. These results demonstrate that vertical ionic diffusion predominantly determines the device's intrinsic temporal response and lateral electronic transport shapes the transient characteristics, providing a clear physical basis for interpreting time-dependent behaviours in mixed ionic-electronic conductors. |
|---|