Vibrational Dynamics of Hybrid Organic-Inorganic Perovskites

ORAL

Abstract

Vibrational modes, which are connected to the electronic properties of hybrid organic-inorganic perovskites (HOIPs) through the structural transition, electron-phonon coupling, and hot-phonon bottleneck effect, is an important topic for perovskite solar cells. This talk focuses on the phonon modes of two perovskite materials, MAPbI3 (MA = CH3NH3) and FAPbI3 (FA = HC(NH2)2). We have performed inelastic neutron scattering, Raman scattering, and density-functional theory (DFT) calculations on both systems. Our analysis well reproduces the low-temperature inelastic neutron scattering spectra for MAPbI3 and FAPbI3, and illuminates the connection between the vibrational dynamics and the organic molecules.

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Presenters

  • Depei Zhang

    University of Virginia, Department of Physics, University of Virginia

Authors

  • Depei Zhang

    University of Virginia, Department of Physics, University of Virginia

  • Tianran Chen

    University of Virginia, NIST Center for Neutron Research, National Institute of Standards and Technology

  • Alexander Chen

    University of Virginia, Department of Chemical Engineering, University of Virginia

  • Maiko Kofu

    Material and Life Science Experimental Facility, Japan Proton Accelerator Research Complex, J-PARC Center

  • Wei-Liang Chen

    National Taiwan University, Center for Condensed Matter Sciences, National Taiwan University

  • Douglas L Abernathy

    Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA

  • Mina Yoon

    Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, CNMS, Oak Ridge National Lab, Center for Nanophase Materials Sciences, Oak Ridge National Lab

  • Craig Brown

    NIST Center for Neutron Research, National Institute of Standards and Technology, NIST Center for Neutron Research

  • Leland Harriger

    NIST Center for Neutron Research, National Institute of Standards and Technology

  • Guangyong Xu

    NIST Center for Neutron Research, National Institute of Standards and Technology, National Institute of Standards and Technology, NCNR, NIST, NIST Center for Neutron Research

  • Ryoichi Kajimoto

    Material and Life Science Experimental Facility, Japan Proton Accelerator Research Complex

  • Yu-Ming Chang

    National Taiwan University, Center for Condensed Matter Sciences, National Taiwan University, Center for Condensed Matter Sciences, National Taiwan University, Taiwan

  • Joshua Choi

    University of Virginia, Department of Chemical Engineering, University of Virginia

  • Seunghun Lee

    University of Virginia, Department of Physics, University of Virginia