Berlin 2018 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 23: Organic Photovoltaics I

CPP 23.12: Talk

Tuesday, March 13, 2018, 12:45–13:00, C 243

Parameter extraction from measured solar cell IV curves using CELIC model — •Vladislav Jovanov, Arne Müller, and Veit Wagner — Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany

Current voltage (IV) characteristic of solar cells with low mobility of charge carriers cannot be described using classical Shockley model. To properly describe behavior of low-mobility solar cells, we have developed analytical CELIC model based on simplified drift-diffusion calculations [1]. This model assumes a constant electric field (CE) and linearly increasing current (LIC) contributions of holes an electrons inside the semiconductor layer. Furthermore, the developed model takes into account recombination processes within the semiconductor bulk and at the contact interfaces. We have already shown that CELIC model is not limited only to solar cells with low mobility of charge carrier, and it can be also used for modeling of perovskite and silicon solar cells. In this study, we show how to extract material parameters from measured solar cell IV curves using CELIC model. For this purpose, we have fabricated organic bulk hetero-junction solar cells for different composition ratio of polymer and fullerene using solution processing. By applying CELIC model, we can analyze the crossing point between dark and light curves and access mobility and contact properties in dependence of composition of the semiconductor layer.

[1] A.Müller, V.Jovanov, V.Wagner, Appl.Phys.Lett. 111 (2017) 023506