Negative Capacitance and Inverted Hysteresis: Matching Features in Perovskite Solar Cells
Impact
Scholar |
Other documents of the author: Alvarez, Agustin; Arcas, Ramón; Aranda Alonso, Clara; Bethencourt, Loengrid; Mas, Elena; Saliba, Michael; Fabregat-Santiago, Francisco
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Negative Capacitance and Inverted Hysteresis: Matching Features in Perovskite Solar CellsAuthor (s)
Date
2020-10-01Publisher
American Chemical SocietyISSN
1948-7185Bibliographic citation
ALVAREZ, Agustin O., et al. Negative Capacitance and Inverted Hysteresis: Matching Features in Perovskite Solar Cells. arXiv preprint arXiv:2005.11828, 2020.Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/pdf/10.1021/acs.jpclett.0c02331Version
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Negative capacitance in the low-frequency domain and inverted hysteresis are familiar features in perovskite solar cells, which origin is still under discussion. Here we use impedance spectroscopy to analyze these ... [+]
Negative capacitance in the low-frequency domain and inverted hysteresis are familiar features in perovskite solar cells, which origin is still under discussion. Here we use impedance spectroscopy to analyze these responses in methylammonium lead bromide cells treated with lithium cations at the electron-selective layer/perovskite interface and in iodide devices exposed to different relative humidity conditions. Employing the surface polarization model, we obtain a time constant associated with the kinetics of the interaction of ions/vacancies with the surface, τkin, in the range of 100–102 s for all the cases exhibiting both features. These interactions lead to a decrease in the overall recombination resistance, modifying the low-frequency perovskite response and yielding a flattening of the cyclic voltammetry. As a consequence of these results we find that negative capacitance and inverted hysteresis lead to a decrease in the fill factor and photovoltage values. [-]
Is part of
J. Phys. Chem. Lett. 2020, 11, 19, 8417–8423Investigation project
No 764787, ENE2017-85087-C3-1-RRights
Copyright © 2020 American Chemical Society
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
This item appears in the folowing collection(s)
- INAM_Articles [528]
- FCA_Articles [511]