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https://doi.org/10.21256/zhaw-22964| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Crystal‐size‐induced band gap tuning in perovskite films |
| Authors: | Ummadisingu, Amita Meloni, Simone Mattoni, Alessandro Tress, Wolfgang Grätzel, Michael |
| et. al: | No |
| DOI: | 10.1002/anie.202106394 10.21256/zhaw-22964 |
| Published in: | Angewandte Chemie: International Edition |
| Volume(Issue): | 60 |
| Issue: | 39 |
| Page(s): | 21368 |
| Pages to: | 21376 |
| Issue Date: | 2021 |
| Publisher / Ed. Institution: | Wiley |
| ISSN: | 1433-7851 1521-3773 |
| Language: | English |
| Subject (DDC): | 621.3: Electrical, communications, control engineering |
| Abstract: | A comprehensive picture explaining the effect of the crystal size in metal halide perovskite films on their opto-electronic characteristics is currently lacking. We report that perovskite nanocrystallites exhibit a wider band gap due to concurrent quantum confinement and size dependent structural effects, with the latter being remarkably distinct and attributed to the perturbation from the surface of the nanocrystallites affecting the structure of their core. This phenomenon might assist in the photo-induced charge separation within the perovskite in devices employing mesoporous layers as they restrict the size of nanocrystallites present in them. We demonstrate that the crystal size effect is widely applicable as it is ubiquitous in different compositions and deposition methods employed in the fabrication of state-of-the-art perovskite solar cells. This effect is a convenient and effective way to tune the band gap of perovskites, thus shedding light on the path forward for the design of perovskite opto-electronic devices. |
| Further description: | This is the peer reviewed version which has been published in final form at https://doi.org/10.1002/anie.202106394. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/22964 |
| Fulltext version: | Accepted version |
| License (according to publishing contract): | Licence according to publishing contract |
| Restricted until: | 2022-07-20 |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Computational Physics (ICP) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021_Ummadisingu-etal_Band-gap-tuning-in-perovskite-films.pdf | Accepted Version | 1.25 MB | Adobe PDF |  View/Open |
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Ummadisingu, A., Meloni, S., Mattoni, A., Tress, W., & Grätzel, M. (2021). Crystal‐size‐induced band gap tuning in perovskite films. Angewandte Chemie: International Edition, 60(39), 21368–21376. https://doi.org/10.1002/anie.202106394
Ummadisingu, A. et al. (2021) ‘Crystal‐size‐induced band gap tuning in perovskite films’, Angewandte Chemie: International Edition, 60(39), pp. 21368–21376. Available at: https://doi.org/10.1002/anie.202106394.
A. Ummadisingu, S. Meloni, A. Mattoni, W. Tress, and M. Grätzel, “Crystal‐size‐induced band gap tuning in perovskite films,” Angewandte Chemie: International Edition, vol. 60, no. 39, pp. 21368–21376, 2021, doi: 10.1002/anie.202106394.
UMMADISINGU, Amita, Simone MELONI, Alessandro MATTONI, Wolfgang TRESS und Michael GRÄTZEL, 2021. Crystal‐size‐induced band gap tuning in perovskite films. Angewandte Chemie: International Edition. 2021. Bd. 60, Nr. 39, S. 21368–21376. DOI 10.1002/anie.202106394
Ummadisingu, Amita, Simone Meloni, Alessandro Mattoni, Wolfgang Tress, and Michael Grätzel. 2021. “Crystal‐Size‐Induced Band Gap Tuning in Perovskite Films.” Angewandte Chemie: International Edition 60 (39): 21368–76. https://doi.org/10.1002/anie.202106394.
Ummadisingu, Amita, et al. “Crystal‐Size‐Induced Band Gap Tuning in Perovskite Films.” Angewandte Chemie: International Edition, vol. 60, no. 39, 2021, pp. 21368–76, https://doi.org/10.1002/anie.202106394.
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