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Universal control strategy for anomalous ionic-electronic phenomenology in perovskite solar cells efficiency measurements

The unprecedented increase of photovoltaic perovskites performance metrics has been obscured by the puzzling phenomenology underlying the device's anomalous ionic/electronic landscape. Thus, the establishment of a reliable measurement protocol of efficiency measurements, unanimously adopted by...

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Bibliographic Details
Published in:Materials today energy 2022-07, Vol.27, p.101031, Article 101031
Main Authors: Hernández-Balaguera, Enrique, Muñoz-Díaz, Laura, Pereyra, Carlos, Lira-Cantú, Mónica, Najafi, Mehrdad, Galagan, Yulia
Format: Article
Language:English
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Summary:The unprecedented increase of photovoltaic perovskites performance metrics has been obscured by the puzzling phenomenology underlying the device's anomalous ionic/electronic landscape. Thus, the establishment of a reliable measurement protocol of efficiency measurements, unanimously adopted by the perovskite's community, is indeed necessary to ensure comparability of device performance between different research laboratories. Here, we report a control strategy of ionic-electronic cooperative relaxation phenomena, eliminating the “hysteria around hysteresis”. The procedure, based on mixed engineering strategies, solves the problem that arises from the difficulty of providing steady-state device operation conditions, capturing in turn the anomalous capacitive behavior. From the determination of an optimal scan rate for J–V modeling, we provide an experimental visualization of the interplay between perovskites' ionic and electronic responses. The results of this combined theoretical and experimental study identify key guidelines about assessment procedural of device performance that should be taken into account in future publications to further improve reproducibility in the research field. [Display omitted] •Physical model for the control of current-voltage hysteresis in perovskites.•Analysis of the fractional dynamics underlying the anomalous ionic/electronic landscape.•Steady-state device operation, capturing the dispersive transient responses.•Identification of the optimal scan rate for efficiency assessment in perovskites.
ISSN:2468-6069
2468-6069
DOI:10.1016/j.mtener.2022.101031