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dc.contributor.authorAhn, Hyeyoungen_US
dc.contributor.authorHuang, Hsinen_US
dc.contributor.authorHsieh, Meng-Ien_US
dc.contributor.authorLi, Ming-Hsienen_US
dc.contributor.authorChen, Peteren_US
dc.date.accessioned2018-08-21T05:52:46Z-
dc.date.available2018-08-21T05:52:46Z-
dc.date.issued2017-11-01en_US
dc.identifier.issn0021-4922en_US
dc.identifier.urihttp://dx.doi.org/10.7567/JJAP.56.110307en_US
dc.identifier.urihttp://hdl.handle.net/11536/143936-
dc.description.abstractWe report the structural and low-frequency vibrational properties of methylammonium lead-iodide (MAPbI(3)) perovskites studied by terahertz spectroscopy. The characteristic low-frequency mode splitting is observed in room-temperature tetragonal MAPbI(3) films grown on Si, and the frequencies of split modes are found to coincide with those of orthorhombic phases. The strain arising from the symmetry and lattice mismatch against the substrates is responsible for the local distortion of inorganic cages and results in the mode-splitting. The use of a mesoporous TiO2 interlayer effectively reduces the strain at the perovskite-substrate interface and induces larger grain growth and the improvement of structural ordering in the tetragonal MAPbI(3) films. (C) 2017 The Japan Society of Applied Physicsen_US
dc.language.isoen_USen_US
dc.titleObservation of strain-induced phonon mode splitting in the tetragonal hybrid halide perovskiteen_US
dc.typeArticleen_US
dc.identifier.doi10.7567/JJAP.56.110307en_US
dc.identifier.journalJAPANESE JOURNAL OF APPLIED PHYSICSen_US
dc.citation.volume56en_US
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000413108100002en_US
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