Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time
The last decade has witnessed the impressive progress of perovskite solar cells (PSCs), with power conversion efficiency exceeding 25%. Nevertheless, the unsatisfactory device stability and current–voltage hysteresis normally observed with most PSCs under operational conditions are bottlen...
| Main Authors: | , , , , , , , |
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute
2020
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| Online Access: | https://hdl.handle.net/1721.1/125417 |
| _version_ | 1811072117017411584 |
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| author | Mahapatra, Apurba Parikh, Nishi Kumar, Pawan Kumar, Manoj Prochowicz, Daniel Kalam, Abul Tavakoli, Mohammad Mahdi Yadav, Pankaj |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Mahapatra, Apurba Parikh, Nishi Kumar, Pawan Kumar, Manoj Prochowicz, Daniel Kalam, Abul Tavakoli, Mohammad Mahdi Yadav, Pankaj |
| author_sort | Mahapatra, Apurba |
| collection | MIT |
| description | The last decade has witnessed the impressive progress of perovskite solar cells (PSCs), with power conversion efficiency exceeding 25%. Nevertheless, the unsatisfactory device stability and current–voltage hysteresis normally observed with most PSCs under operational conditions are bottlenecks that hamper their further commercialization. Understanding the electrical characteristics of the device during the aging process is important for the design and development of effective strategies for the fabrication of stable PSCs. Herein, electrochemical impedance spectroscopical (IS) analyses are used to study the time-dependent electrical characteristics of PSC. We demonstrate that both the dark and light ideality factors are sensitive to aging time, indicating the dominant existence of trap-assisted recombination in the investigated device. By analyzing the capacitance versus frequency responses, we show that the low-frequency capacitance increases with increasing aging time due to the accumulation of charges or ions at the interfaces. These results are correlated with the observed hysteresis during the current–voltage measurement and provide an in-depth understanding of the degradation mechanism of PSCs with aging time. |
| first_indexed | 2024-09-23T09:01:09Z |
| format | Article |
| id | mit-1721.1/125417 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T09:01:09Z |
| publishDate | 2020 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1254172022-09-26T09:52:30Z Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time Mahapatra, Apurba Parikh, Nishi Kumar, Pawan Kumar, Manoj Prochowicz, Daniel Kalam, Abul Tavakoli, Mohammad Mahdi Yadav, Pankaj Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science The last decade has witnessed the impressive progress of perovskite solar cells (PSCs), with power conversion efficiency exceeding 25%. Nevertheless, the unsatisfactory device stability and current–voltage hysteresis normally observed with most PSCs under operational conditions are bottlenecks that hamper their further commercialization. Understanding the electrical characteristics of the device during the aging process is important for the design and development of effective strategies for the fabrication of stable PSCs. Herein, electrochemical impedance spectroscopical (IS) analyses are used to study the time-dependent electrical characteristics of PSC. We demonstrate that both the dark and light ideality factors are sensitive to aging time, indicating the dominant existence of trap-assisted recombination in the investigated device. By analyzing the capacitance versus frequency responses, we show that the low-frequency capacitance increases with increasing aging time due to the accumulation of charges or ions at the interfaces. These results are correlated with the observed hysteresis during the current–voltage measurement and provide an in-depth understanding of the degradation mechanism of PSCs with aging time. 2020-05-22T18:18:41Z 2020-05-22T18:18:41Z 2020-05 2020-04 2020-05-14T13:55:52Z Article http://purl.org/eprint/type/JournalArticle 1420-3049 https://hdl.handle.net/1721.1/125417 Mahapatra, Apurba, et al. "Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time." Molecules, 25 (May 2020): 2299. © 2020 the Author(s) http://dx.doi.org/10.3390/molecules25102299 Molecules Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Mahapatra, Apurba Parikh, Nishi Kumar, Pawan Kumar, Manoj Prochowicz, Daniel Kalam, Abul Tavakoli, Mohammad Mahdi Yadav, Pankaj Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title | Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title_full | Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title_fullStr | Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title_full_unstemmed | Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title_short | Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time |
| title_sort | changes in the electrical characteristics of perovskite solar cells with aging time |
| url | https://hdl.handle.net/1721.1/125417 |
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