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Composition Engineering in Two-Dimensional Pb-Sn-Alloyed Perovskites for Efficient and Stable Solar Cells

Chen, Yani ; Sun, Yong ; Peng, Jiajun ; Chábera, Pavel LU ; Honarfar, Alireza ; Zheng, Kaibo LU and Liang, Ziqi (2018) In ACS Applied Materials and Interfaces 10(25). p.21343-21348
Abstract

Environmentally friendly tin (Sn)-based metallic halide perovskites suffer from oxidation and morphological issues. Here, we demonstrate the composition engineering of Pb-Sn-alloyed two-dimensional (2D) Ruddlesden-Popper perovskites, (BA)2(MA)3Pb4-xSnxI13, for efficient and stable solar cell applications. Smooth thin films with high surface coverage are readily formed without using any additive owing to the self-assembly characteristic of 2D perovskites. It is found that Sn plays a significant role in improving the crystallization and crystal orientation while narrowing the bandgap of Pb-Sn 2D perovskites. Photophysical studies further reveal that the optimal Sn ratio (25 mol %)... (More)

Environmentally friendly tin (Sn)-based metallic halide perovskites suffer from oxidation and morphological issues. Here, we demonstrate the composition engineering of Pb-Sn-alloyed two-dimensional (2D) Ruddlesden-Popper perovskites, (BA)2(MA)3Pb4-xSnxI13, for efficient and stable solar cell applications. Smooth thin films with high surface coverage are readily formed without using any additive owing to the self-assembly characteristic of 2D perovskites. It is found that Sn plays a significant role in improving the crystallization and crystal orientation while narrowing the bandgap of Pb-Sn 2D perovskites. Photophysical studies further reveal that the optimal Sn ratio (25 mol %) based sample exhibits both minimized trap density and weakened quantum confinement for efficient charge separation. Consequently, the optimized (BA)2(MA)3Pb3SnI13-based solar cells yield the best power conversion efficiency close to 6% with suppressed hysteresis.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
composition engineering, organic-inorganic hybrid perovskites, planar solar cells, tin-based perovskites, two-dimensional
in
ACS Applied Materials and Interfaces
volume
10
issue
25
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85048220590
  • pmid:29870223
ISSN
1944-8244
DOI
10.1021/acsami.8b06256
language
English
LU publication?
yes
id
a8fe407b-94fd-40f4-bfdb-464179123b18
date added to LUP
2021-01-13 23:13:12
date last changed
2024-03-05 19:49:55
@article{a8fe407b-94fd-40f4-bfdb-464179123b18,
  abstract     = {{<p>Environmentally friendly tin (Sn)-based metallic halide perovskites suffer from oxidation and morphological issues. Here, we demonstrate the composition engineering of Pb-Sn-alloyed two-dimensional (2D) Ruddlesden-Popper perovskites, (BA)<sub>2</sub>(MA)<sub>3</sub>Pb<sub>4-x</sub>Sn<sub>x</sub>I<sub>13</sub>, for efficient and stable solar cell applications. Smooth thin films with high surface coverage are readily formed without using any additive owing to the self-assembly characteristic of 2D perovskites. It is found that Sn plays a significant role in improving the crystallization and crystal orientation while narrowing the bandgap of Pb-Sn 2D perovskites. Photophysical studies further reveal that the optimal Sn ratio (25 mol %) based sample exhibits both minimized trap density and weakened quantum confinement for efficient charge separation. Consequently, the optimized (BA)<sub>2</sub>(MA)<sub>3</sub>Pb<sub>3</sub>SnI<sub>13</sub>-based solar cells yield the best power conversion efficiency close to 6% with suppressed hysteresis.</p>}},
  author       = {{Chen, Yani and Sun, Yong and Peng, Jiajun and Chábera, Pavel and Honarfar, Alireza and Zheng, Kaibo and Liang, Ziqi}},
  issn         = {{1944-8244}},
  keywords     = {{composition engineering; organic-inorganic hybrid perovskites; planar solar cells; tin-based perovskites; two-dimensional}},
  language     = {{eng}},
  number       = {{25}},
  pages        = {{21343--21348}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{Composition Engineering in Two-Dimensional Pb-Sn-Alloyed Perovskites for Efficient and Stable Solar Cells}},
  url          = {{http://dx.doi.org/10.1021/acsami.8b06256}},
  doi          = {{10.1021/acsami.8b06256}},
  volume       = {{10}},
  year         = {{2018}},
}