title: Carrier Decay Properties of Mixed Cation Formamidinium-Methylammonium Lead Iodide Perovskite [HC(NH2)2]1-x[CH3NH3]xPbI3Nanorods.
abstract: Organic-inorganic lead iodide perovskites are efficient materials for photovoltaics and light-emitting diodes. We report carrier decay dynamics of nanorods of mixed cation formamidinium and methylammonium lead iodide perovskites [HC(NH2)2]1-x[CH3NH3]xPbI3(FA1-xMAxPbI3) synthesized through a simple solution method. The structure and FA/MA composition ratio of the single-crystal FA1-xMAxPbI3nanorods are fully characterized, which shows that the mixed cation FA1-xMAxPbI3nanorods are stabilized in the perovskite structure. The photoluminescence (PL) emission from FA1-xMAxPbI3nanorods continuously shifts from 821 to 782 nm as the MA ratio (x) increases from 0 to 1 and is shown to be inhomogeneously broadened. Time-resolved PL from individual FA1-xMAxPbI3nanorods demonstrates that lifetimes of mixed cation FA1-xMAxPbI3nanorods are longer than those of the pure FAPbI3or MAPbI3nanorods, and the FA0.4MA0.6PbI3displays the longest average PL lifetime of about 2 μs. These results suggest that mixed cation FA1-xMAxPbI3perovskites are promising for high-efficiency photovoltaics and other optoelectronic applications.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.|Department of Physics, Jiangsu University of Science and Technology , Zhenjiang 212003, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Dai
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Yongping
authors.initials: Y
authors.lastname: Fu
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Lydia H
authors.initials: LH
authors.lastname: Manger
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Morgan T
authors.initials: MT
authors.lastname: Rea
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Leekyoung
authors.initials: L
authors.lastname: Hwang
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Randall H
authors.initials: RH
authors.lastname: Goldsmith
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53705, United States.
authors.forename: Song
authors.identifier: http://orcid.org/0000-0001-8693-7010
authors.initials: S
authors.lastname: Jin