10.1021/acs.jpclett.6b01958.s001
Jun Dai
Jun
Dai
Yongping Fu
Yongping
Fu
Lydia H. Manger
Lydia H.
Manger
Morgan T. Rea
Morgan T.
Rea
Leekyoung Hwang
Leekyoung
Hwang
Randall H. Goldsmith
Randall H.
Goldsmith
Song Jin
Song
Jin
Carrier Decay Properties of Mixed Cation Formamidinium–Methylammonium
Lead Iodide Perovskite [HC(NH<sub>2</sub>)<sub>2</sub>]<sub>1–<i>x</i></sub>[CH<sub>3</sub>NH<sub>3</sub>]<sub><i>x</i></sub>PbI<sub>3</sub> Nanorods
American Chemical Society
2016
iodide perovskites
x PbI 3
HC
FA 0.4 MA 0.6 PbI 3 displays
PL
CH 3 NH 3
carrier Decay Properties
MAPbI 3 nanorods
cation
report carrier decay dynamics
2016-11-23 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Carrier_Decay_Properties_of_Mixed_Cation_Formamidinium_Methylammonium_Lead_Iodide_Perovskite_HC_NH_sub_2_sub_sub_2_sub_sub_1_i_x_i_sub_CH_sub_3_sub_NH_sub_3_sub_sub_i_x_i_sub_PbI_sub_3_sub_Nanorods/4264472
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(NH<sub>2</sub>)<sub>2</sub>]<sub>1–<i>x</i></sub>[CH<sub>3</sub>NH<sub>3</sub>]<sub><i>x</i></sub>PbI<sub>3</sub> (FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub>) synthesized through a simple
solution method. The structure and FA/MA composition ratio of the
single-crystal FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> nanorods are fully characterized,
which shows that the mixed cation FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> nanorods are
stabilized in the perovskite structure. The photoluminescence (PL)
emission from FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> nanorods continuously shifts from
821 to 782 nm as the MA ratio (<i>x</i>) increases from
0 to 1 and is shown to be inhomogeneously broadened. Time-resolved
PL from individual FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> nanorods demonstrates that
lifetimes of mixed cation FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> nanorods are longer
than those of the pure FAPbI<sub>3</sub> or MAPbI<sub>3</sub> nanorods,
and the FA<sub>0.4</sub>MA<sub>0.6</sub>PbI<sub>3</sub> displays the
longest average PL lifetime of about 2 μs. These results suggest
that mixed cation FA<sub>1–<i>x</i></sub>MA<sub><i>x</i></sub>PbI<sub>3</sub> perovskites are promising for high-efficiency
photovoltaics and other optoelectronic applications.