SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Organic Electronics and Photovoltaics I (joint session CPP/HL)
CPP 18.6: Vortrag
Dienstag, 28. März 2023, 10:45–11:00, GÖR 226
Implementation and simulation of drift-diffusion models for organic mixed conductor devices — •Andres David Peña Unigarro1,2 and Florian Steffen Gunther2,3 — 1Institute of physics, TU Chemnitz, Chemnitz, Germany — 2IFSC, University of São Paulo, Brazil — 3UNESP, Rio Claro, Brazil
Organic electrochemical transistors (OECTs) have emerged as potential transducers in applications that require the conversion of ion fluxes to electronic current. For the understanding of the fundamental mechanism in OECTs and OECT-based applications, as well as for their rational optimization, however, it is essential to have theoretical models that agree with experimentally measured device responds. Most of the existing OECT models consider that the ion flux from the electrolyte into the organic, semiconducting layer takes place only due to an electrical field. These models are efficient to describe the steady state operations of OECTs, but are rather limited when compared to transient behaviors. Recently, more refined models which take a diffusion term into account, have been developed. The simplifications needed to use an analytical solution of the governing equation, however, reduces its generality, limiting the results to specific cases. In our work, we use numerical methods to solve the drift-diffusion equation in one dimension to overcome these limitations of the analytical solution. This allows us to go beyond the standard boundary conditions and to analyze the impact of other alterations.