Mechanical Reliability of Fullerene/Tin Oxide Interfaces in Monolithic Perovskite/Silicon Tandem Cells
Authorsde Bastiani, Michele
Jalmood, Rawan S.
Eswaran, Mathan Kumar
Subbiah, Anand Selvin
De Wolf, Stefaan
KAUST DepartmentApplied Physics
Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
Computational Physics and Materials Science (CPMS)
KAUST Solar Center (KSC)
Material Science and Engineering Program
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Embargo End Date2023-01-25
Permanent link to this recordhttp://hdl.handle.net/10754/675143
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AbstractHigh-efficiency perovskite-based solar cells comprise sophisticated stacks of materials which, however, often feature different thermal expansion coefficients and are only weakly bonded at their interfaces. This may raise concerns over delamination in such devices, jeopardizing their long-term stability and commercial viability. Here, we investigate the root causes of catastrophic top-contact delamination we observed in state-of-the-art p-i-n perovskite/silicon tandem solar cells. By combining macroscopic and microscopic analyses, we identify the interface between the fullerene electron transport layer and the tin oxide buffer layer at the origin of such delamination. Specifically, we find that the perovskite morphology and its roughness play a significant role in the microscopic adhesion of the top layers, as well as the film processing conditions, particularly the deposition temperature and the sputtering power. Our findings mandate the search for new interfacial linking strategies to enable mechanically strong perovskite-based solar cells, as required for commercialization.
CitationDe Bastiani, M., Armaroli, G., Jalmood, R., Ferlauto, L., Li, X., Tao, R., … De Wolf, S. (2022). Mechanical Reliability of Fullerene/Tin Oxide Interfaces in Monolithic Perovskite/Silicon Tandem Cells. ACS Energy Letters, 827–833. doi:10.1021/acsenergylett.1c02148
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award nos. KAUST OSR-2018-CARF/CCF-3079, KAUST OSR-CRG RF/1/3383, KAUST OSR-CRG2018-3737, and IED OSR-2019-4208. L.F. and D.C. acknowledge funding from the European Community through the POR-FESR “FORTRESS” project, grant no. I38D18000150009 (PG/2018/629121).
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters