Organic cation segregation and degradation in perovskite solar cells: a neutron scattering study
In recent years, perovskite solar cells (PSC), have stunned the photovoltaic field owing to their unique combination of high performance and low-cost fabrication process. Compared with the existing technology, PSCs have demonstrated their potential by establishing an unprecedented increment in the power conversion efficiency (PCE) from 3.8% to >23.2% in less than a decade. Typically, hybrid perovskites are used, where the organic cations inside the perovskite satisfy the Goldschmidt tolerance factor, but present an oriental disorder in the crystal which increases with the temperature. In this context, in the present proposal we aim to perform a combination of neutron reflectometry and SANS experiments to study the structural part of the perovskite layer of the solar cells, paying special attention to the degradation of the perovsike and the organic cation segregation inside the perovskite structure. We will add up the results of these experiments with measurements of the PCE of each sample fresh and degraded. This will provide us with a scenario where we will be able to correlate the efficiency of the PSC with the degradation and organic cation distribution in the perovskite layer.
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PORRO AZPIAZU Jose Maria; HONECKER Dirk; SAERBECK Thomas and SALADO Manuel. (2019). Organic cation segregation and degradation in perovskite solar cells: a neutron scattering study. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-170
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