title: [(CH3)3NCH2CH2NH3]SnI4: a layered perovskite with quaternary/primary ammonium dications and short interlayer iodine-iodine contacts.
abstract: The organic-inorganic hybrid [(CH(3))(3)NCH(2)CH(2)NH(3)]SnI(4) presents a layered perovskite structure, templated by an organic dication containing both a primary and a quaternary ammonium group. Due to the high charge density and small size of the organic cation, the separation of the perovskite layers is small and short iodine-iodine contacts of 4.19 A are formed between the layers. Optical thin-film measurements on this compound indicate a significant red shift of the exciton peak (630 nm) associated with the band gap, as compared with other SnI(4)(2)(-)-based layered perovskite structures.
authors.affiliation: IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598, USA.
authors.forename: Zhengtao
authors.initials: Z
authors.lastname: Xu
authors.forename: David B
authors.initials: DB
authors.lastname: Mitzi
authors.forename: David R
authors.initials: DR
authors.lastname: Medeiros