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To start the crystallization of the tin (Sn) based perovskite materials, anti-solvent treatment is a useful technique. But the use of anti-solvents increases the complexity of the deposition process thus hinders the applicability in mass production processes. Here we have developed an anti-solvent free MAPb0.75Sn0.25(I0.50Br0.50)3 perovskite thin film deposition method based on a one step spin coating process. Addition of 0 - 100 mol% of methylammonium acetate (MAAc) to the precursor ink allows for the deposition of continuous films. Films casted from ink with less than 60 mol% MAAc show pinholes and are rough. A decent crystalline and pin-hole free perovskite thin film can be obtained from 60 or more mol% MAAc additive. These results are confirmed by XRD, AFM and SEM measurements. MAPb0.75Sn0.25(I0.50Br0.50)3 has a wide bandgap and is currently being considered for applications in tandem solar cells and under water solar cells.
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Fabricate anti-solvent free tin-lead based perovskite solar cells with MAAc additives
Anti-solvent-free one-step deposition of perovskite thin film shows promising potential for application in slot-die or roll-to-roll mass fabrication processes of perovskite solar cells. The continuous coverage was confirmed by PV response of devices made using the on-step deposition process. In this work, we have developed a process to deposit MAPB0.75Sn0.25(I0.5Br0.5)3 perovskite thin films without anti-solvent adding MAAc to the ink. By varying the Br content of the perovskite precursor, we were able to tune the bandpap. Fabricated solar cells with the structure ITO/CuI/MAPb0.75Sn0.25(I0.5Br0.5)3/C60/BCP/Al with PCE of 4.59% show the parth of the fabrication process of antisolvent-free tin-lead-based solar cells.
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- Award ID(s):
- 1906492
- PAR ID:
- 10461788
- Editor(s):
- Li, Gang; Nguyen, Thuc-Quyen; Nogueira, Ana Flávia; Rand, Barry P.; Moons, Ellen; Stingelin, Natalie
- Date Published:
- Journal Name:
- Organic, Hybrid, and Perovskite Photovoltaics XXIII, 1220905
- Volume:
- 12209
- Page Range / eLocation ID:
- 53
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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- Free Publicly Accessible Full Text
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Accepted Manuscript1.0
- Conference Paper:
- https://doi.org/10.1117/12.2634371
