Ambient Pressure XPS Investigation of Thermally Stable Halide Perovskite Solar Cells via Post-Treatment
Abstract
Long-term thermal stability is one limiting factor that impedes the commercialization of perovskite solar cell. Inspired by our prior results from machine learning, we discover that coating a thin layer of 4,4’-dibromotriphenylamine (DBTPA) on top of a CH3NH3PbI3 (MAPbI3) thin film can improve the stability of the resultant perovskite solar cells. The passivated perovskite solar cells retained more than 96% of their initial power conversion efficiency over 1000 h at 85 °C in N2 atmosphere without encapsulation. Near-ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) was employed to investigate the evolution of composition and evaluate thermal and moisture stability by in-situ studies. A comparison between pristine MAPbI3 films and DBTPA-treated films shows the DBTPA treatment suppresses the escape of iodide and methylamine up to 150 °C under 5 mbar humidity. Furthermore, we have used ATR-FTIR and XPS to probe the interactions between DBTPA and MAPbI3 surface. The results prove that DBTPA coordinate with perovskite by Lewis acid-base and cation-π interaction. Compared with the 19.9% efficiency of pristine sample, the champion efficiency of passivated sample reaches 20.6%. Finally, our results reveal DBTPA as a new post-treating molecule that not only leads to the improvement of photovoltaic efficiency but also thermal and moisture stability.
- Authors:
-
- Sichuan Univ., Chengdu (China); The Ohio State Univ., Columbus, OH (United States)
- The Ohio State Univ., Columbus, OH (United States)
- Lanzhou Univ. (China)
- Sichuan Univ., Chengdu (China)
- Publication Date:
- Research Org.:
- The Ohio State Univ., Columbus, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1657787
- Grant/Contract Number:
- FG02-07ER46427
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 39; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY
Citation Formats
Ning, Shougui, Zhang, Songwei, Sun, Jiaonan, Li, Congping, Zheng, Jingfeng, Khalifa, Yehia, Zhou, Shouhuan, Cao, Jing, and Wu, Yiying. Ambient Pressure XPS Investigation of Thermally Stable Halide Perovskite Solar Cells via Post-Treatment. United States: N. p., 2020.
Web. doi:10.1021/acsami.0c12044.
Ning, Shougui, Zhang, Songwei, Sun, Jiaonan, Li, Congping, Zheng, Jingfeng, Khalifa, Yehia, Zhou, Shouhuan, Cao, Jing, & Wu, Yiying. Ambient Pressure XPS Investigation of Thermally Stable Halide Perovskite Solar Cells via Post-Treatment. United States. https://doi.org/10.1021/acsami.0c12044
Ning, Shougui, Zhang, Songwei, Sun, Jiaonan, Li, Congping, Zheng, Jingfeng, Khalifa, Yehia, Zhou, Shouhuan, Cao, Jing, and Wu, Yiying. Fri .
"Ambient Pressure XPS Investigation of Thermally Stable Halide Perovskite Solar Cells via Post-Treatment". United States. https://doi.org/10.1021/acsami.0c12044. https://www.osti.gov/servlets/purl/1657787.
@article{osti_1657787,
title = {Ambient Pressure XPS Investigation of Thermally Stable Halide Perovskite Solar Cells via Post-Treatment},
author = {Ning, Shougui and Zhang, Songwei and Sun, Jiaonan and Li, Congping and Zheng, Jingfeng and Khalifa, Yehia and Zhou, Shouhuan and Cao, Jing and Wu, Yiying},
abstractNote = {Long-term thermal stability is one limiting factor that impedes the commercialization of perovskite solar cell. Inspired by our prior results from machine learning, we discover that coating a thin layer of 4,4’-dibromotriphenylamine (DBTPA) on top of a CH3NH3PbI3 (MAPbI3) thin film can improve the stability of the resultant perovskite solar cells. The passivated perovskite solar cells retained more than 96% of their initial power conversion efficiency over 1000 h at 85 °C in N2 atmosphere without encapsulation. Near-ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) was employed to investigate the evolution of composition and evaluate thermal and moisture stability by in-situ studies. A comparison between pristine MAPbI3 films and DBTPA-treated films shows the DBTPA treatment suppresses the escape of iodide and methylamine up to 150 °C under 5 mbar humidity. Furthermore, we have used ATR-FTIR and XPS to probe the interactions between DBTPA and MAPbI3 surface. The results prove that DBTPA coordinate with perovskite by Lewis acid-base and cation-π interaction. Compared with the 19.9% efficiency of pristine sample, the champion efficiency of passivated sample reaches 20.6%. Finally, our results reveal DBTPA as a new post-treating molecule that not only leads to the improvement of photovoltaic efficiency but also thermal and moisture stability.},
doi = {10.1021/acsami.0c12044},
journal = {ACS Applied Materials and Interfaces},
number = 39,
volume = 12,
place = {United States},
year = {Fri Sep 04 00:00:00 EDT 2020},
month = {Fri Sep 04 00:00:00 EDT 2020}
}
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