Stable perovskite solar cells using tin acetylacetonate based electron transporting layers

Organic-inorganic lead halide perovskites with over 23% power conversion efficiency have attracted enormous academic and industrial attention due to their low-cost fabrication and high device performance. Self-passivated tin oxide as an electron transport layer has shown potential mainly due to the...

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Bibliographic Details
Published in:Energy & environmental science 2019-06, Vol.12 (6), p.191-1917
Main Authors: Abuhelaiqa, Mousa, Paek, Sanghyun, Lee, Yonghui, Cho, Kyung Taek, Heo, Sung, Oveisi, Emad, Huckaba, Aron Joel, Kanda, Hiroyuki, Kim, Hobeom, Zhang, Yi, Humphry-Baker, Robin, Kinge, Sachin, Asiri, Abdullah M, Nazeeruddin, Mohammad Khaja
Format: Article
Language:English
Subjects:
Durability
Electron transfer
Electron transport
Energy conversion efficiency
Fabrication
Lead
Lead compounds
Metal halides
Morphology
Oxide coatings
Perovskites
Photovoltaic cells
Precursors
Solar cells
Tin
Tin dioxide
Tin oxide
Tin oxides
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Summary:Organic-inorganic lead halide perovskites with over 23% power conversion efficiency have attracted enormous academic and industrial attention due to their low-cost fabrication and high device performance. Self-passivated tin oxide as an electron transport layer has shown potential mainly due to the enhanced electron transfer, stability and reduced hysteresis device features. Here we report on novel, non-colloidal tin oxide precursors based on acetylacetonate (one halide free and two halogenated with Cl and Br respectively). We explore the unique film morphology acquired from the non-colloidal precursors and the improved device performance they yield. Our results show that the halide residue in the films plays an impactful role in the thermal durability of the fabricated SnO 2 film, as well as providing a passivation layer. Moreover, our optimized tin oxide films achieved an unprecedented power conversion efficiency of 22.19% in planar perovskite solar cells (21.4% certified by Newport), and once upscaled to large-area modules, 16.7% devices based on a 15 cm 2 area were achieved. High performing planar-type perovskite solar cells and mini-modules are fabricated by incorporating passivated tin oxide based on non-colloidal acetylacetonate precursors.
ISSN:1754-5692
1754-5706
DOI:10.1039/c9ee00453j