Stability – From Perovskite Solar Cells to Memristors
Wolfgang Tress a
a Institute of Computational Physics, Zurich University of Applied Sciences, Winterthur, Switzerland, Gertrudstrasse, 15, Winterthur, Switzerland
Invited Speaker Session, Wolfgang Tress, presentation 153
Publication date: 6th February 2024

Perovskite solar cells remain prone to stability issues and slow transients either being present already directly after fabrication or occurring during operation for longer times. Additionally, metastabilities can be observed, which allow for resistive switching and applications beyond solar cells.

In this talk, I address these topics from various angles. These include the question whether conclusions regarding solar-cell stability can be drawn from the perovskite data base [1] by using advanced data analysis; and how performance-limiting factors can be identified at current-voltage data using machine-learning based methods [2].

In the second part I will present high performance perovskite resistive switches, which show an on-off current ratio in the order of 1e10 and are stable for millions of cycles. With the aid of transient and temperature-dependent measurements, the factors determining the switching behaviour are unraveled. They are complemented by photoluminescence mapping and nanoscale measurements shedding light on the switching mechanism in the device.

This research received funding from the European Union's Horizon 2020 research and innovation program under grant agreement no. 851676 (ERC StGrt). Funding by ZHAW digital in the framework of a DIZH fellowship is acknowledged as well.

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