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Title: Phonon features in terahertz photoconductivity spectra due to data analysis artifact: A case study on organometallic halide perovskites
Authors: Marcus, Ruldoph Arthur
Michel-Beyerle, Maria-Elisabeth
Lam, Yeng Ming
Chia, Elbert Ee Min
La-o-vorakiat, Chan
Cheng, Liang
Salim, Teddy
Keywords: Phonons
Issue Date: 2017
Source: 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-.
Series/Report no.: Applied Physics Letters
Abstract: 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.
ISSN: 0003-6951
DOI: 10.1063/1.4978688
Schools: School of Materials Science & Engineering 
School of Physical and Mathematical Sciences 
Rights: © 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: []. 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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