Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites

We propose a simple scenario where the superimposed phonon modes on the photoconductive spectra are experimental artifacts due to the invalid formula used in data analysis. By use of experimental and simulated data of CH3NH3PbI3 perovskites as a case study, we demonstrate that a correction term must...

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Main Authors: Marcus, Ruldoph Arthur, Michel-Beyerle, Maria-Elisabeth, Lam, Yeng Ming, Chia, Elbert Ee Min, La-o-vorakiat, Chan, Cheng, Liang, Salim, Teddy
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/83354
http://hdl.handle.net/10220/42564
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-833542023-02-28T19:32:40Z Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites Marcus, Ruldoph Arthur Michel-Beyerle, Maria-Elisabeth Lam, Yeng Ming Chia, Elbert Ee Min La-o-vorakiat, Chan Cheng, Liang Salim, Teddy School of Materials Science & Engineering School of Physical and Mathematical Sciences Phonons Photoconductivity We propose a simple scenario where the superimposed phonon modes on the photoconductive spectra are experimental artifacts due to the invalid formula used in data analysis. By use of experimental and simulated data of CH3NH3PbI3 perovskites as a case study, we demonstrate that a correction term must be included in the approximated thin-film formula used in the literature; otherwise, parts of the spectra with high background permittivity near the phonon-mode resonances might interfere with the transient photoconductivity. The implication of this work is not limited to perovskites but other materials with strong vibrational modes within the THz spectral range. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version 2017-06-02T08:13:04Z 2019-12-06T15:20:38Z 2017-06-02T08:13:04Z 2019-12-06T15:20:38Z 2017 Journal Article La-o-vorakiat, C., Cheng, L., Salim, T., Marcus, R. A., Michel-Beyerle, M.-E., Lam, Y. M., et al. (2017). Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites. Applied Physics Letters, 110(12), 123901-. 0003-6951 https://hdl.handle.net/10356/83354 http://hdl.handle.net/10220/42564 10.1063/1.4978688 en Applied Physics Letters © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: [http://dx.doi.org/10.1063/1.4978688]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Phonons
Photoconductivity
spellingShingle Phonons
Photoconductivity
Marcus, Ruldoph Arthur
Michel-Beyerle, Maria-Elisabeth
Lam, Yeng Ming
Chia, Elbert Ee Min
La-o-vorakiat, Chan
Cheng, Liang
Salim, Teddy
Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
description We propose a simple scenario where the superimposed phonon modes on the photoconductive spectra are experimental artifacts due to the invalid formula used in data analysis. By use of experimental and simulated data of CH3NH3PbI3 perovskites as a case study, we demonstrate that a correction term must be included in the approximated thin-film formula used in the literature; otherwise, parts of the spectra with high background permittivity near the phonon-mode resonances might interfere with the transient photoconductivity. The implication of this work is not limited to perovskites but other materials with strong vibrational modes within the THz spectral range.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Marcus, Ruldoph Arthur
Michel-Beyerle, Maria-Elisabeth
Lam, Yeng Ming
Chia, Elbert Ee Min
La-o-vorakiat, Chan
Cheng, Liang
Salim, Teddy
format Article
author Marcus, Ruldoph Arthur
Michel-Beyerle, Maria-Elisabeth
Lam, Yeng Ming
Chia, Elbert Ee Min
La-o-vorakiat, Chan
Cheng, Liang
Salim, Teddy
author_sort Marcus, Ruldoph Arthur
title Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
title_short Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
title_full Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
title_fullStr Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
title_full_unstemmed Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
title_sort phonon features in terahertz photoconductivity spectra due to data analysis artifact: a case study on organometallic halide perovskites
publishDate 2017
url https://hdl.handle.net/10356/83354
http://hdl.handle.net/10220/42564
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