Interfacial engineering of mp-TiO2/CH3NH3PbI3 with Al2O3: Effect of different phases of alumina on performance and stability of perovskite solar cells

In this paper, α , γ and amorphous Al 2 O 3 were deposited on mesoporous TiO 2 by spin coating technique. Among the phases of alumina used for coating the TiO 2 layer, photo anode electrode prepared by γ -Al 2 O 3 showed better photovoltaic properties than those covered by α and amorph-Al 2 O 3 . Th...

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Bibliographic Details
Published in:Journal of materials research 2021-12, Vol.36 (24), p.4938-4950
Main Authors: Jahanbakhshi Zadeh, Naser, Borhani Zarandi, Mahmood
Format: Article
Language:English
Subjects:
Aluminum oxide
Applied and Technical Physics
Biomaterials
Chemistry and Materials Science
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Performance enhancement
Perovskites
Photovoltaic cells
Solar cells
Spin coating
Substrates
Titanium dioxide
Transitional aluminas
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Summary:In this paper, α , γ and amorphous Al 2 O 3 were deposited on mesoporous TiO 2 by spin coating technique. Among the phases of alumina used for coating the TiO 2 layer, photo anode electrode prepared by γ -Al 2 O 3 showed better photovoltaic properties than those covered by α and amorph-Al 2 O 3 . The perovskite solar cells which constructed by surface passivated TiO 2 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 -Al 2 O 3 as substrate of perovskite (remain about 68% of efficiency after 70 days). Our findings provide vital understanding to improve the performance and stability of TiO 2 - and Al 2 O 3 -based perovskite solar cells. Graphical abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-021-00442-9