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dc.contributor.authorRolston, Nicholasen_US
dc.contributor.authorPrintz, Adam D.en_US
dc.contributor.authorTracy, Jared M.en_US
dc.contributor.authorWeerasinghe, Hashita C.en_US
dc.contributor.authorVak, Doojinen_US
dc.contributor.authorHaur, Lew Jiaen_US
dc.contributor.authorPriyadarshi, Anishen_US
dc.contributor.authorMathews, Nripanen_US
dc.contributor.authorSlotcavage, Daniel J.en_US
dc.contributor.authorMcGehee, Michael D.en_US
dc.contributor.authorKalan, Roghi E.en_US
dc.contributor.authorZielinski, Kennethen_US
dc.contributor.authorGrimm, Ronald L.en_US
dc.contributor.authorTsai, Hsinhanen_US
dc.contributor.authorNie, Wanyien_US
dc.contributor.authorMohite, Aditya D.en_US
dc.contributor.authorGholipour, Somayehen_US
dc.contributor.authorSaliba, Michaelen_US
dc.contributor.authorGrätzel, Michaelen_US
dc.contributor.authorDauskardt, Reinhold H.en_US
dc.identifier.citationRolston, N., Printz, A. D., Tracy, J. M., Weerasinghe, H. C., Vak, D., Haur, L. J., . . . Dauskardt, R. H. (2018). Effect of cation composition on the mechanical stability of perovskite solar cells. Advanced Energy Materials, 8(9), 1702116-. doi:10.1002/aenm.201702116en_US
dc.description.abstractPhotoactive perovskite semiconductors are highly tunable, with numerous inorganic and organic cations readily incorporated to modify optoelectronic properties. However, despite the importance of device reliability and long service lifetimes, the effects of various cations on the mechanical properties of perovskites are largely overlooked. In this study, the cohesion energy of perovskites containing various cation combinations of methylammonium, formamidinium, cesium, butylammonium, and 5-aminovaleric acid is reported. A trade-off is observed between the mechanical integrity and the efficiency of perovskite devices. High efficiency devices exhibit decreased cohesion, which is attributed to reduced grain sizes with the inclusion of additional cations and PbI2 additives. Microindentation hardness testing is performed to estimate the fracture toughness of single-crystal perovskite, and the results indicated perovskites are inherently fragile, even in the absence of grain boundaries and defects. The devices found to have the highest fracture energies are perovskites infiltrated into a porous TiO2/ZrO2/C triple layer, which provide extrinsic reinforcement and shielding for enhanced mechanical and chemical stability.en_US
dc.relation.ispartofAdvanced Energy Materialsen_US
dc.rights© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.en_US
dc.titleEffect of cation composition on the mechanical stability of perovskite solar cellsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.subject.keywordsMechanical Stabilityen_US
item.fulltextNo Fulltext-
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