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Degradation observations of encapsulated planar CH3NH3PbI3 perovskite solar cells at high temperatures and humidity
journal contribution
posted on 2015-04-21, 00:00 authored by Y Han, S Meyer, Y Dkhissi, K Weber, Jenny PringleJenny Pringle, U Bach, L Spiccia, Y B ChengThe stability of encapsulated planar-structured CH3NH3PbI3 (MAPbI3) perovskite solar cells (PSCs) was investigated under various simulated environmental conditions. The tests were performed under approximately one sun (100 mW cm-2) illumination, varying temperature (up to 85 °C cell temperature) and humidity (up to 80%). The application of advanced sealing techniques improved the device stability, but all devices showed significant degradation after prolonged aging at high temperature and humidity. The degradation mechanism was studied by post-mortem analysis of the disassembled cells using SEM and XRD. This revealed that the degradation was mainly due to the decomposition of MAPbI3, as a result of reaction with H2O, and the subsequent reaction of hydroiodic acid, formed during MAPbI3 decomposition, with the silver back contact electrode layer.
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Journal
Journal of materials chemistry aVolume
3Issue
15Pagination
8139 - 8147Publisher
Royal Society of ChemistryLocation
Cambridge, Eng.Publisher DOI
ISSN
2050-7488eISSN
2050-7496Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, Royal Society of ChemistryUsage metrics
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