Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells
Abstract
In this study, we investigate the feasibility of using a fluoroalkyl-substituted fullerene/perovskite heterojunction (f-FPHJ) to realize efficient and ambient stable perovskite solar cells (PVSCs). The hybrid fluoroalkyl-substituted fullerene, DF-C60, is proven to effectively passivate the defects and grain boundaries in the perovskite film to facilitate charge transport/collection in the derived PVSC. Consequently, the f-FPHJ device yielded an enhanced PCE of 18.11%, outperforming that of the pristine CH3NH3PbI3 device (15.67%). More interestingly, the f-FPHJ PVSC showed a decent PCE of 15.14% (under reverse scan) with small hysteresis even without employing a discrete PCBM electron-transporting layer (ETL), in contrast to the pristine PVSC showing a lower PCE of 14.78% (under reverse scan) accompanied with severe hysteresis. This might arise from the preferential distribution of DF-C60 nearby the surface region of the f-FPHJ film due to its low surface energy, which serves the similar function of the PCBM ETL in device to reduce hysteresis. More importantly, benefitting from the hydrophobic nature of DF-C60, the f-FPHJ PVSC shows respectable ambient stability without encapsulation, which can maintain 83% of its initial PCE after being stored in ambient (with a relative humidity of 60 ± 5%) for 1 month.
- Authors:
-
- Univ. of Washington, Seattle, WA (United States); Harbin Institute of Technology, Harbin (China)
- Univ. of Washington, Seattle, WA (United States)
- Harbin Institute of Technology, Harbin (China)
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); US Air Force Office of Scientific Research (AFOSR); Boeing-Johnson Foundation; China Scholarship Council
- OSTI Identifier:
- 1343588
- Alternate Identifier(s):
- OSTI ID: 1398668
- Report Number(s):
- DOE-UW-Jen-22
Journal ID: ISSN 2211-2855; PII: S2211285516304554
- Grant/Contract Number:
- EE0006710; N00014-14-1-0246; FA2386-15-1-4106
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Energy
- Additional Journal Information:
- Journal Volume: 30; Journal Issue: C; Journal ID: ISSN 2211-2855
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite; fluoroalkyl-substituted fullerene; grain boundary; stability; heterojunction
Citation Formats
Liu, Xiao, Lin, Francis, Chueh, Chu -Chen, Chen, Qi, Zhao, Ting, Liang, Po -Wei, Zhu, Zonglong, Sun, Ye, and Jen, Alex K. -Y. Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells. United States: N. p., 2016.
Web. doi:10.1016/j.nanoen.2016.10.036.
Liu, Xiao, Lin, Francis, Chueh, Chu -Chen, Chen, Qi, Zhao, Ting, Liang, Po -Wei, Zhu, Zonglong, Sun, Ye, & Jen, Alex K. -Y. Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells. United States. https://doi.org/10.1016/j.nanoen.2016.10.036
Liu, Xiao, Lin, Francis, Chueh, Chu -Chen, Chen, Qi, Zhao, Ting, Liang, Po -Wei, Zhu, Zonglong, Sun, Ye, and Jen, Alex K. -Y. Wed .
"Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells". United States. https://doi.org/10.1016/j.nanoen.2016.10.036. https://www.osti.gov/servlets/purl/1343588.
@article{osti_1343588,
title = {Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells},
author = {Liu, Xiao and Lin, Francis and Chueh, Chu -Chen and Chen, Qi and Zhao, Ting and Liang, Po -Wei and Zhu, Zonglong and Sun, Ye and Jen, Alex K. -Y.},
abstractNote = {In this study, we investigate the feasibility of using a fluoroalkyl-substituted fullerene/perovskite heterojunction (f-FPHJ) to realize efficient and ambient stable perovskite solar cells (PVSCs). The hybrid fluoroalkyl-substituted fullerene, DF-C60, is proven to effectively passivate the defects and grain boundaries in the perovskite film to facilitate charge transport/collection in the derived PVSC. Consequently, the f-FPHJ device yielded an enhanced PCE of 18.11%, outperforming that of the pristine CH3NH3PbI3 device (15.67%). More interestingly, the f-FPHJ PVSC showed a decent PCE of 15.14% (under reverse scan) with small hysteresis even without employing a discrete PCBM electron-transporting layer (ETL), in contrast to the pristine PVSC showing a lower PCE of 14.78% (under reverse scan) accompanied with severe hysteresis. This might arise from the preferential distribution of DF-C60 nearby the surface region of the f-FPHJ film due to its low surface energy, which serves the similar function of the PCBM ETL in device to reduce hysteresis. More importantly, benefitting from the hydrophobic nature of DF-C60, the f-FPHJ PVSC shows respectable ambient stability without encapsulation, which can maintain 83% of its initial PCE after being stored in ambient (with a relative humidity of 60 ± 5%) for 1 month.},
doi = {10.1016/j.nanoen.2016.10.036},
journal = {Nano Energy},
number = C,
volume = 30,
place = {United States},
year = {Wed Oct 19 00:00:00 EDT 2016},
month = {Wed Oct 19 00:00:00 EDT 2016}
}
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Figures / Tables:
Figure 1: (a) Synthesis of DF-C60. (b) Contact angle of PCBM and DF-C60. (c) The FET transfer (left) and output(right) characteristics of DF-C60.
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