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Lookup NU author(s): Dr Pablo Docampo
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© 2018 IEEE. Temperature-dependent electromodulation spectroscopy is applied to perovskite solar cells for the determination of excitonic properties. Measurements have been performed on semitransparent (in transmission and reflection) and non-transparent devices (in reflection) as well as on cells with different absorber materials. The comparison with Elliott fits of standard absorption spectra enables a distinction between bound and continuum excitonic states and points towards bound electron-hole pairs as origin of the optical transitions observed in electromodulation spectra. The excitonic Sommerfeld enhancement leads to a significantly increased absorption in perovskites. Additionally, a comparison of multiple-cation mixed-halide perovskites with standard methylammonium lead iodide indicates a suppression of the phase transition at low temperatures.
Author(s): Ruf F, Magin A, Schultes M, Ayguler MF, Docampo P, Ahlswede E, Kalt H, Hetterich M
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
Year of Conference: 2018
Pages: 1550-1554
Online publication date: 29/11/2018
Acceptance date: 02/04/2018
Publisher: IEEE
URL: https://doi.org/10.1109/PVSC.2018.8548225
DOI: 10.1109/PVSC.2018.8548225
Library holdings: Search Newcastle University Library for this item
ISBN: 9781538685297
