Changes in the Electrical Characteristics of Perovskite Solar Cells with Aging Time
Name
molecules-25-02299.pdf
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2.03 MB
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Checksum (MD5)
b9e6952d0cec61d41dfeaf9e19245778
Author(s)
Mahapatra, Apurba
Parikh, Nishi
Kumar, Pawan
Kumar, Manoj
Prochowicz, Daniel
Kalam, Abul
Tavakoli, Mohammad Mahdi
Yadav, Pankaj
Date Issued
May 2020
Journal
Molecules
Publisher
Multidisciplinary Digital Publishing Institute
Citation
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)
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.3390/molecules25102299
