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Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH_3NH_3PbBr_3 using terahertz time-domain spectroscopy

Zhao, Daming and Skelton, Jonathan M. and Hu, Hongwei and La-o-vorakiat, Chan and Zhu, Jian-Xin and Marcus, Rudolph A. and Michel-Beyerle, Maria-Elisabeth and Lam, Yeng Ming and Walsh, Aron and Chia, Elbert E. M. (2017) Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH_3NH_3PbBr_3 using terahertz time-domain spectroscopy. Applied Physics Letters, 111 (20). Art. No. 201903. ISSN 0003-6951. https://resolver.caltech.edu/CaltechAUTHORS:20171122-075047461

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Abstract

As a light absorber in photovoltaic applications, hybrid organic-inorganic halide perovskites should have long and balanced diffusion lengths for both the separated electrons and holes before recombination, which necessitates high carrier mobility. In polar semiconductors, the room-temperature carrier mobility is often limited by the scattering between carriers and the lowest-frequency optical phonon modes. Using terahertz time-domain spectroscopy, we examine the temperature evolution of these phonon modes in CH_3NH_3PbBr_3 and obtained high carrier mobility values using Feynman's polaron theory. This method allows us to estimate the upper limit of carrier mobilities without the need to create photogenerated free carriers, and can be applied to other heteropolar semiconductor systems with large polarons.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1063/1.4993524DOIArticle
http://aip.scitation.org/doi/10.1063/1.4993524PublisherArticle
ORCID:
AuthorORCID
Zhao, Daming0000-0001-5046-2199
Walsh, Aron0000-0001-5460-7033
Alternate Title:Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH3NH3PbBr3 using terahertz time-domain spectroscopy
Additional Information:© 2017 Published by AIP Publishing. Received 29 June 2017; accepted 2 November 2017; published online 16 November 2017. D.M.Z. acknowledges support from TUM-CREATE. E.E.M.C. acknowledges support from the Singapore Ministry of Education AcRF Tier 1 (RG123/14) and Tier 2 (MOE2015-T2-2-065 and MOE2016-T2-1-054). C.L. acknowledges support from the Theoretical and Computational Science (TaCS) Center and Thailand Research Fund (MRG6080264). R.A.M. thanks the ONR and ARO for their support. M.-E.M.-B. is grateful to the Nanyang Technological University for supporting the Biophysics Center. The work was supported in part by the Center for Integrated Nanotechnologies, a U.S. DOE BES user facility. J.M.S. is grateful for support from the UK Engineering and Physical Sciences Research Council (EPSRC; Grant No. EP/P007821/1). Calculations were performed on the SiSu supercomputer at the IT Center for Science (CSC), Finland, via the Partnership for Advanced Computing in Europe (PRACE) Project No. 13DECI0317/IsoSwitch.
Funders:
Funding AgencyGrant Number
TUM-CREATEUNSPECIFIED
Ministry of Education (Singapore)RG123/14
Ministry of Education (Singapore)MOE2015-T2-2-065
Ministry of Education (Singapore)MOE2016-T2-1-054
Theoretical and Computational Science (TaCS) CenterUNSPECIFIED
Thailand Research FundMRG6080264
Office of Naval Research (ONR)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Nanyang Technological UniversityUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Engineering and Physical Sciences Research Council (EPSRC)EP/P007821/1
Partnership for Advanced Computing in Europe (PRACE)13DECI0317/IsoSwitch
Subject Keywords:Phonons; Electronic transport; Materials; Chemical compounds; Terahertz time-domain spectroscopy
Issue or Number:20
Record Number:CaltechAUTHORS:20171122-075047461
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171122-075047461
Official Citation:Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH3NH3PbBr3 using terahertz time-domain spectroscopy. Daming Zhao, Jonathan M. Skelton, Hongwei Hu, Chan La-o-vorakiat, Jian-Xin Zhu, Rudolph A. Marcus, Maria-Elisabeth Michel-Beyerle, Yeng Ming Lam, Aron Walsh, and Elbert E. M. Chia. Applied Physics Letters 2017 111:20
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83420
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Nov 2017 17:07
Last Modified:03 Oct 2019 19:06

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