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Understanding and Eliminating Hysteresis for Highly Efficient Planar Perovskite Solar Cells
| Content Provider | United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV) |
|---|---|
| Author | Wang, Changlei Xiao, Chuanxiao Zhao, Dewei Awni, Rasha A. Grice, Corey R. Ghimire, Kiran Constantinou, Iordania Liao, Weiqiang Cimaroli, Alexander J. Liu, Pei Chen, Jing Podraza, Nikolas J. Jiang, Chun -Sheng Al-Jassim, Mowafak M. Yan, Yanfa |
| Organization | National Renewable Energy Lab. (NREL), Golden, CO (United States) |
| Abstract | Through detailed device characterization using cross-sectional Kelvin probe force microscopy (KPFM) and trap density of states measurements, we identify that the J-V hysteresis seen in planar organic-inorganic hybrid perovskite solar cells (PVSCs) using SnO2 electron selective layers (ESLs) synthesized by low-temperature plasma-enhanced atomic-layer deposition (PEALD) method is mainly caused by the imbalanced charge transportation between the ESL/perovskite and the hole selective layer/perovskite interfaces. We find that this charge transportation imbalance is originated from the poor electrical conductivity of the low-temperature PEALD SnO2 ESL. We further discover that a facile low-temperature thermal annealing of SnO2 ESLs can effectively improve the electrical mobility of low-temperature PEALD SnO2 ESLs and consequently significantly reduce or even eliminate the J-V hysteresis. With the reduction of J-V hysteresis and optimization of deposition process, planar PVSCs with stabilized output powers up to 20.3% are achieved. Here, the results of this study provide insights for further enhancing the efficiency of planar PVSCs. |
| Sponsorship | USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S), SunShot Initiative USDOE |
| Related Links | https://www.osti.gov/biblio/1392207 |
| File Format | |
| ISSN | 16146832 |
| DOI | 10.1002/aenm.201700414 |
| Journal | Advanced Energy Materials |
| Volume Number | 7 |
| Issue Number | 17 |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2017-05-11 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | SOLAR ENERGY hysteresis Kelvin probe force microscopy perovskite solar cells post annealing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment Materials Science |
