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On the Stability of Planar CH3NH3PbI3 Perovskite Solar Cells Produced in Ambient Conditions by Using Polymer Encapsulates
L. Ocaña, C. Montes, L. De Sousa-Vieira, J.S. Moreno-Ramírez, S. González-Pérez, B. González-Diaz, C. Hernandez-Rodriguez, M. Friend, M. Cendagorta
Degradation, Encapsulation, Absorption, Ethylene Vinyl Acetate (EVA), Perovskite
Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
Subtopic: Perovskite Based Photovoltaics
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 3BV.2.10
721 - 727
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-3BV.2.10
0,00 EUR
Document(s): paper, poster


Photovoltaic devices based on perovskite structures have achieved a relevant improvement in energy efficiency in recent years. However, until now they are unstable under condition of humidity, temperature and solar radiation. In this work we analyze the main degradation causes on these devices. Later, we have analyzed several milestones achieved by the scientific community in terms of improving the stability against solar radiation and temperature for perovskite layers encapsulated with different polymer encapsulates. Finally, the work carried out by ITER’s Solar Cells Laboratory regarding to the degradation of solar cells based on perovskite absorbers, produced in ambient conditions, by using polymer encapsulates is presented. Thus, in a first stage, perovskite layers, encapsulated in EVA films were subjected to different irradiation and thermal conditions. In order to analyze their degradation, optical ellipsometry and microscopy imaging have been used. The preliminary obtained results have demonstrated that optical ellipsometry can be a useful technique in order to study this kind of degradation phenomena. Also, the direct encapsulation of perovskite layers using sheets of EVA provides a great degree of stability against the exposure to temperature and solar radiation.