Annealing effects on interdiffusion in layered FA-rich perovskite solar cells

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dc.contributor.author Oyewole, D. O.
dc.contributor.author Koech, Richard
dc.contributor.author Ichwani, R.
dc.contributor.author Ahmed, R.
dc.contributor.author Tamayo, J. Hinostroza
dc.contributor.author Adeniji, S. A.
dc.contributor.author Cromwell, J.
dc.contributor.author Ullo, E. Colin
dc.contributor.author Oyewole, O. K.
dc.contributor.author Agyei-Tuffour, B.
dc.contributor.author Titova, L. V.
dc.contributor.author Burnham, N. A.
dc.contributor.author Soboyejo, W. O.
dc.date.accessioned 2021-07-07T17:01:25Z
dc.date.available 2021-07-07T17:01:25Z
dc.date.issued 2021-06-23
dc.identifier.uri https://repository.rsif-paset.org/xmlui/handle/123456789/90
dc.description Journal Article en_US
dc.description.abstract Annealing is one of the processing methods that are used for the fabrication of defect-free, photoactive perovskite films with compact grains in highly efficient and stable perovskite solar cells (PSCs). Thus, the annealing temperature is a key parameter for the control of the interdiffusion (of constituent elements) in photoactive films. In this paper, we present the results of a systematic study of the effects of annealing on the interdiffusion of constituent elements in efficient formamidinium-based PSCs. We also explore the effects of annealing-induced interdiffusion on layer microstructures, local strains, and the optoelectronic properties of perovskite films. We observe a dramatic upward diffusion of tin (Sn) and titanium (Ti) from fluorine-doped tin oxide and titanium dioxide (TiO2) to the perovskite films. We also observe a downward diffusion of lead (Pb) and iodine (I) from the perovskite films to the mesoporous layer of the electron transporting layer (ETL), after annealing at temperatures between 100 and 150 °C. The diffused I substitutes for Ti in the ETL, which improves the optoelectronic properties of the films, for annealing temperatures between 100 and 130 °C. The annealing-induced interdiffusion that occurs at higher temperatures (between 140 and 150 °C) results in higher levels of interdiffusion, along with increased local strains that lead to the nucleation of pores and cracks. Finally, the implications of the results are discussed for the design of PSCs with improved photoconversion efficiencies and stability. en_US
dc.publisher AIP Advances en_US
dc.relation.ispartofseries 11;
dc.subject Annealing, interdiffusion, layered FA-rich perovskite solar cells en_US
dc.title Annealing effects on interdiffusion in layered FA-rich perovskite solar cells en_US
dc.type Article en_US

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