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Interfacial Effects of Tin Oxide Atomic Layer Deposition in Metal Halide Perovskite Photovoltaics

Journal Article · · Advanced Energy Materials
Metal halide perovskites offer a wide and tunable bandgap, making them promising candidates for top–cell absorbers in tandem photovoltaics. In this work, the authors aim to understand the atomic layer deposition (ALD) precursor–perovskite interactions of the tin oxide ALD system and the role of organic fullerenes at the perovskite–tin oxide interface while establishing a framework for developing alternative perovskite–compatible ALD processes in the future. It is shown, in the case of tin oxide ALD growth with tetrakis(dimethylamino)tin(IV) and water on FA0.83Cs0.17Pb(I0.83Br0.17)3 perovskite, that perovskite stability is most sensitive to metal–organic exposure at elevated temperatures with an onset near 110 °C, resulting in removal of the formamidinium cation. Transitioning from ALD to pulsed–chemical vapor deposition tin oxide growth can minimize the degradation effects. Investigation of fullerenes at the perovskite interface shows that thin fullerene layers offer minor improvements to perovskite stability under ALD conditions, but significant enhancement in carrier extraction. Fullerene materials are undesirable due to fabrication cost and poor mechanical stability. Compositional tuning of the perovskite material can improve the fullerene–free device performance. Furthermore, this method is demonstrated with a bromine–rich perovskite phase to enable an 8.2% efficient perovskite device with all–inorganic extraction layers.
Research Organization:
Stanford University, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008154; EE0008167
OSTI ID:
1671800
Alternate ID(s):
OSTI ID: 1537423
OSTI ID: 1457065
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 23 Vol. 8; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Chemical Analysis of the Interface between Hybrid Organic–Inorganic Perovskite and Atomic Layer Deposited Al 2 O 3 journal January 2019
Enhanced Nucleation of Atomic Layer Deposited Contacts Improves Operational Stability of Perovskite Solar Cells in Air journal October 2019
Atomic Layer Deposition of Functional Layers in Planar Perovskite Solar Cells journal October 2019
Atomic layer deposition for efficient and stable perovskite solar cells journal January 2019
Atomic layer deposition of vanadium oxide to reduce parasitic absorption and improve stability in n–i–p perovskite solar cells for tandems journal January 2019
Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems journal March 2020

Figures / Tables (7)


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