Consistent Device Simulation Model Describing Perovskite Solar Cells in Steady-State, Transient and Frequency Domain
Martin Neukom a b c, Andreas Schiller a b, Simon Züfle a b, Evelyne Knapp a, Antonio Cabas Vidani a, Jorge Ávila d, Daniel Pérez-del-Rey d, Chris Dreessen d, Kassio Zanoni d, Michele Sessolo d, Henk Bolink d, Beat Ruhstaller a b
a ZHAW – Institute of Computational Physics, Wildbachstrasse, 21, Winterthur, Switzerland
b Fluxim AG, CH, Katharina-Sulzer-Platz, 2, Winterthur, Switzerland
c University of Augsburg, Institute of Physics, Germany, 86135 Augsburg,, Augsburg, Germany
d Instituto de Ciencia Molecular, Universidad de Valencia, Paterna, Valencia, 46980, Spain, Carrer del Catedrátic José Beltrán Martinez, 2, Paterna, Spain
Proceedings of International Online Conference on Hybrid Materials and Optoelectronic Devices (HYBRIDOE21)
Online, Spain, 2021 December 15th - 17th
Organizers: Jinwei Gao, Hua Yu, Dewei Zhao, Haizheng Zhong, Hairen Tan and Xueqing Xu
Oral, Antonio Cabas Vidani, presentation 005
Publication date: 3rd December 2021

Opto-electronic measurements on perovskite solar cells show several characteristic features, such as IV curve hysteresis [1-2] and slow transient current rise [3]. It is believed, that these effects are caused by mobile ionic charges in the perovskite layer and simulation models including ionic charges could qualitatively reproduce these individual features [1-3]. To increase the trustability of the model, we systematically studied the influence of individual model parameters to find a single set of parameters to explain the combined results from various measurement techniques [4].

Here we present measurements of methylammonium lead iodide (MAPI) perovskite solar cells in the DC, AC and transient regime. The applied techniques include IV curves with different scan rates, light‑intensity dependent open‑circuit voltage, impedance spectra, intensity-modulated photocurrent spectra (IMPS), transient photocurrents and transient voltage step responses. These experimental data sets are successfully reproduced by a drift‑diffusion simulation using a single set of parameters.

This allows for a better understanding of the governing physical effects and provides a powerful tool to study the influence of device parameters on the solar cell performance and efficiency. Our in‑depth parameter study suggests possible paths towards an optimized device.

© Fundació Scito
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