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Is CH3NH3PbI3 Polar?

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dc.contributor.author Sharada, G.
dc.contributor.author Mahale, Pratibha
dc.contributor.author Kore, Bhushan P.
dc.contributor.author Mukherjee, Somdutta
dc.contributor.author Pavan, Mysore S.
dc.contributor.author De, Chandan
dc.contributor.author Ghara, Somnath
dc.contributor.author Sundaresan, A.
dc.contributor.author Pandey, Anshu
dc.contributor.author Row, Tayur N. Guru
dc.contributor.author Sarma, D. D.
dc.date.accessioned 2017-01-24T06:24:58Z
dc.date.available 2017-01-24T06:24:58Z
dc.date.issued 2016
dc.identifier.citation Sharada, G.; Mahale, P.; Kore, B. P.; Mukherjee, S.; Pavan, M. S.; De, C. D.; Ghara, S.; Sundaresan, A.; Pandey, A.; Row, T. N. G.; Sarma, D. D., Is CH3NH3PbI3 Polar? Journal of Physical Chemistry Letters 2016, 7 (13), 2412-2419 http://dx.doi.org/10.1021/acs.jpclett.6b00803 en_US
dc.identifier.citation Journal of Physical Chemistry Letters en_US
dc.identifier.citation 7 en_US
dc.identifier.citation 13 en_US
dc.identifier.issn 1948-7185
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2141
dc.description Restricted Access en_US
dc.description.abstract In view of the continued controversy concerning the polar/nonpolar nature of the hybrid perovskite system, CH3NH3PbI3, we report the first investigation of a time resolved pump probe measurement of the second harmonic generation efficiency as well as using its more traditional form as a sensitive probe of the absence/presence of the center of inversion in the system both in its excited and ground states, respectively. Our results clearly show that SHG efficiency, if nonzero, is below the limit of detection, strongly indicative of a nonpolar or centrosymmetric structure. Our results on the same samples, based on temperature dependent single crystal X-ray diffraction and P-E loop measurements, are entirely consistent with the above conclusion of a centrosymmetric structure for this compound in all three phases, namely the high temperature cubic phase, the intermediate temperature tetragonal phase and the low temperature orthorhombic phase. It is important to note that all our experimental probes are volume averaging and performed on bulk materials, suggesting that basic material properties of CH3NH3PbI3 are consistent with a centrosymmetric, nonpolar structure. en_US
dc.description.uri http://dx.doi.org/10.1021/acs.jpclett.6b00803 en_US
dc.language.iso English en_US
dc.publisher American Chemical Society en_US
dc.rights @American Chemical Society, 2016 en_US
dc.subject Chemistry en_US
dc.subject Materials Science en_US
dc.subject Physics en_US
dc.subject Perovskite Solar-Cells en_US
dc.subject Organometal Halide Perovskites en_US
dc.subject Methylammonium Lead Iodide en_US
dc.subject Organic-Inorganic Perovskite en_US
dc.subject Ferroelectric Polarization en_US
dc.subject High-Performance en_US
dc.subject Single-Crystals en_US
dc.subject Hybrid Perovskites en_US
dc.subject Thin-Films en_US
dc.subject Photovoltaics en_US
dc.title Is CH3NH3PbI3 Polar? en_US
dc.type Article en_US


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