CaltechAUTHORS
Published March 20, 2017 | Version Published + Supplemental Material
Journal Article Open

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

Creators

  • 1. ROR icon King Mongkut's University of Technology Thonburi
  • 2. ROR icon Nanyang Technological University
  • 3. ROR icon California Institute of Technology

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 CH_3NH_3PbI_3 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.

Additional Information

© 2017 AIP Publishing. Received 27 December 2016; accepted 1 March 2017; published online 20 March 2017. This research was supported by the Theoretical and Computational Science (TaCS) Center under Computational and Applied Science for Smart Innovation Cluster (CLASSIC), Faculty of Science, KMUTT, Singapore Ministry of Education AcRF Tier 2 (MOE2015-T2-2-065), AcRF Tier 1 (RG123/14 & RF99/14) and the A*STAR Pharos Programmes (Grant No. 1527400026 & 1527000016).

Attached Files

Published - 1_2E4978688.pdf

Supplemental Material - .listing

Supplemental Material - supplementaryv3.pdf

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Additional details

Identifiers

Eprint ID
75383
Resolver ID
CaltechAUTHORS:20170324-094431788

Funding

Ministry of Education (Singapore)
MOE2015-T2-2-065
Ministry of Education (Singapore)
RG123/14
Ministry of Education (Singapore)
RF99/14
Agency for Science, Technology and Research (A*STAR)
1527400026
Agency for Science, Technology and Research (A*STAR)
1527000016

Dates

Created
2017-03-24
Created from EPrint's datestamp field
Updated
2021-11-15
Created from EPrint's last_modified field