Impact of interface defects on the band alignment and performance of TiO$_2$/MAPI/Cu$_2$O perovskite solar cells
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915789254164480 |
|---|---|
| author | Filipoiu, Nicolae Cuzminschi, Marina Cosinschi, Mihaela Pantis-Simut, Calin-Andrei Torfason, Kristinn Brophy, Rachel Elizabeth Manolescu, Andrei Patru, Roxana E. Besleaga, Cristina Stan, George E. Pintilie, Ioana Nemnes, George Alexandru |
| author_facet | Filipoiu, Nicolae Cuzminschi, Marina Cosinschi, Mihaela Pantis-Simut, Calin-Andrei Torfason, Kristinn Brophy, Rachel Elizabeth Manolescu, Andrei Patru, Roxana E. Besleaga, Cristina Stan, George E. Pintilie, Ioana Nemnes, George Alexandru |
| contents | Optimizing the interfaces in perovskite solar cells (PSCs) is essential for enhancing their performance, improving their stability, and making them commercially viable for large-scale deployment in solar energy harvesting applications. Point defects, like vacancies, have a dual role, as they can inherently provide a proper doping, but they can also reduce the collected current by trap-assisted recombination. Moreover, they can play an active role in ion migration and degradation. Using {\it ab initio} density functional theory (DFT) calculations we investigate the changes in the band alignment induced by interfacial vacancy defects in a TiO$_2$/MAPI/Cu$_2$O based PSC. Depending on the type of the vacancy (Ti, Cu, O, Pb, I) in the oxide and perovskite materials, additional doping is superimposed on the already existing background. Their effect on the performance of the PSCs becomes visible, as shown by SCAPS simulations. The most significant impact is observed for $p$ type doping of TiO$_2$ and $n$ type doping of Cu$_2$O, while the effective doping of the perovskite layer affects one of the two interfaces. We discuss these results based on modifications of the band structure near the active interfaces and provide further insights concerning the optimization of electron and hole collection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_19594 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Impact of interface defects on the band alignment and performance of TiO$_2$/MAPI/Cu$_2$O perovskite solar cells Filipoiu, Nicolae Cuzminschi, Marina Cosinschi, Mihaela Pantis-Simut, Calin-Andrei Torfason, Kristinn Brophy, Rachel Elizabeth Manolescu, Andrei Patru, Roxana E. Besleaga, Cristina Stan, George E. Pintilie, Ioana Nemnes, George Alexandru Materials Science Applied Physics Optimizing the interfaces in perovskite solar cells (PSCs) is essential for enhancing their performance, improving their stability, and making them commercially viable for large-scale deployment in solar energy harvesting applications. Point defects, like vacancies, have a dual role, as they can inherently provide a proper doping, but they can also reduce the collected current by trap-assisted recombination. Moreover, they can play an active role in ion migration and degradation. Using {\it ab initio} density functional theory (DFT) calculations we investigate the changes in the band alignment induced by interfacial vacancy defects in a TiO$_2$/MAPI/Cu$_2$O based PSC. Depending on the type of the vacancy (Ti, Cu, O, Pb, I) in the oxide and perovskite materials, additional doping is superimposed on the already existing background. Their effect on the performance of the PSCs becomes visible, as shown by SCAPS simulations. The most significant impact is observed for $p$ type doping of TiO$_2$ and $n$ type doping of Cu$_2$O, while the effective doping of the perovskite layer affects one of the two interfaces. We discuss these results based on modifications of the band structure near the active interfaces and provide further insights concerning the optimization of electron and hole collection. |
| title | Impact of interface defects on the band alignment and performance of TiO$_2$/MAPI/Cu$_2$O perovskite solar cells |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2406.19594 |