Abstract
In this paper, α, γ and amorphous Al2O3 were deposited on mesoporous TiO2 by spin coating technique. Among the phases of alumina used for coating the TiO2 layer, photo anode electrode prepared by γ-Al2O3 showed better photovoltaic properties than those covered by α and amorph-Al2O3. The perovskite solar cells which constructed by surface passivated TiO2 films showed worse performance and stability than the unpassivated devices. Also, using the amorphous phase of alumina as substrate of perovskite in the structure of perovskite solar cells leads to lower solar cell stability (remain about 49% of efficiency after 70 days) compared to using α and γ-Al2O3 as substrate of perovskite (remain about 68% of efficiency after 70 days). Our findings provide vital understanding to improve the performance and stability of TiO2- and Al2O3-based perovskite solar cells.
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The authors gratefully acknowledge the support of the Yazd photonics research group (YPRG) of the Yazd University.
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Jahanbakhshi Zadeh, N., Borhani Zarandi, M. Interfacial engineering of mp-TiO2/CH3NH3PbI3 with Al2O3: Effect of different phases of alumina on performance and stability of perovskite solar cells. Journal of Materials Research 36, 4938–4950 (2021). https://doi.org/10.1557/s43578-021-00442-9
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DOI: https://doi.org/10.1557/s43578-021-00442-9