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Article

Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time

1
Department of Physics & Astronomy, National Institute of Technology, Rourkela 769008, India
2
Department of Science, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar 382 007, India
3
Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
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Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
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Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Department of Solar Energy, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar 382 007, India
*
Authors to whom correspondence should be addressed.
Academic Editors: Mirosław Mączka, Maciej Ptak and Long Y Chiang
Molecules 2020, 25(10), 2299; https://doi.org/10.3390/molecules25102299
Received: 26 March 2020 / Revised: 29 April 2020 / Accepted: 12 May 2020 / Published: 14 May 2020
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. View Full-Text
Keywords: impedance spectroscopy; perovskite solar cells; recombination impedance spectroscopy; perovskite solar cells; recombination
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MDPI and ACS Style

Mahapatra, A.; Parikh, N.; Kumar, P.; Kumar, M.; Prochowicz, D.; Kalam, A.; Tavakoli, M.M.; Yadav, P. Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time. Molecules 2020, 25, 2299. https://doi.org/10.3390/molecules25102299

AMA Style

Mahapatra A, Parikh N, Kumar P, Kumar M, Prochowicz D, Kalam A, Tavakoli MM, Yadav P. Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time. Molecules. 2020; 25(10):2299. https://doi.org/10.3390/molecules25102299

Chicago/Turabian Style

Mahapatra, Apurba, Nishi Parikh, Pawan Kumar, Manoj Kumar, Daniel Prochowicz, Abul Kalam, Mohammad M. Tavakoli, and Pankaj Yadav. 2020. "Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time" Molecules 25, no. 10: 2299. https://doi.org/10.3390/molecules25102299

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