Direct Correlation of Charge Carrier Transport to Local Crystal Quality in Lead Halide Perovskites

Hickey, Casey L.; Grumstrup, Erik M.

doi:10.1021/acs.nanolett.0c01244

Title: Direct Correlation of Charge Carrier Transport to Local Crystal Quality in Lead Halide Perovskites

Journal Article · Wed Jun 10 00:00:00 EDT 2020 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.0c01244· OSTI ID:1658903

Hickey, Casey L. ^[1];

^[1]

Montana State Univ., Bozeman, MT (United States)

Although solution processing methods provide an attractive route toward development of low-cost functional materials, these accessible fabrication approaches can engender high concentrations of microscopic structural defects that are detrimental to performance. In lead halide perovskites, structural disorder derived from solution processing has been implicated as an important determiner of photophysical properties. However, a direct correlation between the functional properties of these materials and the local crystal structure in which non-equilibrium states evolve has remained elusive, in part because structural heterogeneities occur on length scales that defy conventional characterization techniques. To address this knowledge gap, in this work we have combined ultrafast pump–probe microscopy and electron backscattering diffraction to directly correlate charge carrier transport with the local diffraction pattern contrast, an indicator of crystal quality. Spatial correlation of these measurements strongly suggests that even on individual single crystal CsPbBr3 domains, microscopic variability in the crystal quality profoundly impacts the efficiency of charge carrier transport.

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Research Organization:: Montana State Univ., Bozeman, MT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; Beckman Young Investigator Program; National Science Foundation (NSF)

Grant/Contract Number:: SC0014128; 1632134

OSTI ID:: 1658903

Journal Information:: Nano Letters, Vol. 20, Issue 7; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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Title: Direct Correlation of Charge Carrier Transport to Local Crystal Quality in Lead Halide Perovskites

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