Crucial role of charge transporting layers on ion migration in perovskite solar cells

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F20%3A00335381" target="_blank" >RIV/68407700:21230/20:00335381 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jechem.2019.12.002" target="_blank" >https://doi.org/10.1016/j.jechem.2019.12.002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jechem.2019.12.002" target="_blank" >10.1016/j.jechem.2019.12.002</a>

Result language
angličtina
Original language name
Crucial role of charge transporting layers on ion migration in perovskite solar cells
Original language description
The device preconditioning dependent hysteresis and the consequential performance degradation hinder the actual performance and stability of the perovskite solar cells. Ion migration and charge trapping in the perovskite with large contribution from grain boundaries are the most common interpretations for the hysteresis. Yet, the high performing devices often include intermediate hole and electron transporting layers, which can further complicate the dynamical process in the device. Here, by using Kelvin Probe Force Microscopy and Confocal Photoluminescence Microscopy, we elucidate the impact of charge-transporting layers and excess MAI on the spatial and temporal variations of the photovoltage on the MAPbI3-based solar cells. By studying the devices layer by layer, we found that the light-induced ion migration occurs predominantly in the presence of an imbalanced charge extraction in the solar cells, and the charge transporting layers play crucial role in suppressing it. Careful selection and processing of the electron and hole-transporting materials are thus essential for making perovskite solar cells free from the ion migration effect.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/EF15_003%2F0000464" target="_blank" >EF15_003/0000464: Centre of Advanced Photovoltaics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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