UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Low-Frequency Carrier Kinetics in Triple Cation Perovskite Solar Cells Probed by Impedance and Modulus Spectroscopy

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. Green open access

[thumbnail of Revised Manuscript highlited, accepted version.pdf]
Preview
Text
Revised Manuscript highlited, accepted version.pdf - Accepted Version

Download (905kB) | Preview

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
Downloads since deposit
220Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item