Composition Engineering in Two-Dimensional Pb-Sn-Alloyed Perovskites for Efficient and Stable Solar Cells
(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
- Chen, Yani ; Sun, Yong ; Peng, Jiajun ; Chábera, Pavel LU ; Honarfar, Alireza ; Zheng, Kaibo LU and Liang, Ziqi
- organization
- publishing date
- 2018-06
- 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
-
- pmid:29870223
- scopus:85048220590
- 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
- 2024-09-19 14:53:20
@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}}, }