Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.180
Publication date: 7th February 2022
One of the most promising third generation photovoltaic technologies is Perovskite Solar Cells (PSC). This perovskite family presents outstanding properties such as high absorption coefficient, long diffusion lengths, low-cost technology and ease of scalability. Currently, the efficiency record is set to 25.6 % [1]. On the other hand, the development of new materials combining multiple cations and multiple halides is one of the main research strategies to achieve high performance.
In this work, we have analysed the temperature behaviour of perovskite based solar cells with structure FTO/c-TiOx/m-TiOx/RbCsFAMAPbIBr/Spiro/Au. We have obtained the temperature dependence of the solar cell parameters (Voc, Isc, FF and efficiency) from -20 ºC up to 50 ºC. Impedance Spectroscopy (IS) has been carried out at room temperature and Cole-Cole spectra have been fitted using the Matryoshka circuit. Ideality factor has been obtained both from Voc vs light and from the recombination resistance extracted from IS measurements. In order to determine the dominant recombination mechanism, the activation energy has been estimated from the extrapolation of Voc down to 0 K [2, 3].
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