Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
In recent years, capacitive transient measurements like deep-level transient spectroscopy (DLTS) and transient ion-drift (TID) have been successfully applied to perovskite solar cells to quantify their defect and ion landscape. In multiple studies, the perovskite is assumed to be p-doped, while the mobile ion density is determined to be orders of magnitudes lower than the doping density [1, 2]. Because of the ongoing debate about the doping and mobile ion density in perovskites, it is necessary to evaluate their influence on transient capacitance measurements. In this work, we carry out drift-diffusion simulations of capacitance transients of perovskite solar cells with a wide range of different doping and mobile ion densities to obtain a better understanding of the charge-carrier dynamics during transient capacitance measurements. The simulations suggest that the direction of the capacitance transients is mainly influenced by the formation of a depletion layer within the perovskite and thus the doping density.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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