Tailor, NK;
Senanayak, SP;
Abdi-Jalebi, M;
Satapathi, S;
(2021)
Low-Frequency Carrier Kinetics in Triple Cation Perovskite Solar Cells Probed by Impedance and Modulus Spectroscopy.
Electrochimica Acta
, 386
, Article 138430. 10.1016/j.electacta.2021.138430.
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Abstract
Organometallic halide perovskites-based solar cells have emerged as next-generation photovoltaic technology. However, many of its intriguing optoelectronic properties at low frequency are highly debated. Here, we investigate the low-frequency carrier kinetics of the state-of-the-art triple cation perovskite Cs0.06FA0.79MA0.15Pb(I0.85Br0.15)3 solar cells using bias-dependent impedance and modulus spectroscopy under dark and illumination conditions. We observe a strong dependence of dielectric permittivity on frequency in 1 Hz to 1 MHz region with a dielectric relaxation, which is observed to follow the Maxwell-Wagner type interfacial polarization possibly originating from the grain boundary/ionic defects. Furthermore, correlating the impedance and modulus spectra reveals the localized charge carrier relaxation in this triple cation device from which we obtain a phenomenological picture of the hopping process and developing an understanding of the charge carrier kinetics in these high-efficiency perovskite photovoltaics.
| Type: | Article |
|---|---|
| Title: | Low-Frequency Carrier Kinetics in Triple Cation Perovskite Solar Cells Probed by Impedance and Modulus Spectroscopy |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.electacta.2021.138430 |
| Publisher version: | https://doi.org/10.1016/j.electacta.2021.138430 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10127789 |
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