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Correlation of Spatiotemporal Dynamics of Polarization and Charge Transport in Blended Hybrid Organic–Inorganic Perovskites on Macro- and Nanoscales
journal contribution
posted on 2020-03-20, 19:34 authored by Liam Collins, Eric S. Muckley, Hsinhan Tsai, Dibyajyoti Ghosh, Amanda J. Neukirch, Sergei Tretiak, Sergei V. Kalinin, Wanyi Nie, Ilia N. IvanovProgress
in flexible organic electronics necessitates a full understanding
of how local inhomogeneities impact electronic and ionic conduction
pathways and underlie macroscopic device characteristics. We used
frequency- and time-resolved macro- and nanoprobe measurements to
study spatiotemporal characteristics of multiscale charge transport
dynamics in a series of ternary-blended hybrid organic inorganic perovskites
(HOIPs) (MA0.95–xFAxCs0.05PbI3). We show that A-site
cation composition defines charge transport mechanisms across broad
temporal (102–10–6 s) and spatial
(millimeters–picometers) scales. Ab initio molecular dynamic
simulations suggest that insertion of FA results in a dynamic lattice,
improved ion transport, and dipole screening. We demonstrate that
correlations between macro- and nanoscale measurements provide a pathway
for accessing distribution of relaxation in nanoscale polarization
and charge transport dynamics of ionically conductive functional perovskites.
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macroscopic device characteristicsmultiscale charge transport dynamicsHOIPstudy spatiotemporal characteristicscharge transport dynamicsnanoprobe measurementsnanoscale polarizationaccessing distributionSpatiotemporal Dynamicstime-resolved macroCharge Transportnanoscale measurementsNanoscales ProgressMAionically conductiveion transportinhomogeneities impactFA resultsperovskiteAb initioconduction pathwayscharge transport mechanismsA-site cation composition
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