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Title: Imaging material functionality through three-dimensional nanoscale tracking of energy flow

Abstract

The ability of energy carriers to move between atoms and molecules underlies biochemical and material function. Understanding and controlling energy flow, however, requires observing it on ultrasmall and ultrafast spatio-temporal scales, where energetic and structural roadblocks dictate the fate of energy carriers. Here, we developed a non-invasive optical scheme that leverages non-resonant interferometric scattering to track tiny changes in material polarizability created by energy carriers. We thus map evolving energy carrier distributions in four dimensions of spacetime with few-nanometre lateral precision and directly correlate them with material morphology. We visualize exciton, charge and heat transport in polyacene, silicon and perovskite semiconductors and elucidate how disorder affects energy flow in three dimensions. For example, we show that morphological boundaries in polycrystalline metal halide perovskites possess lateral- and depth-dependent resistivities, blocking lateral transport for surface but not bulk carriers. We also reveal strategies for interpreting energy transport in disordered environments that will direct the design of defect-tolerant materials for the semiconductor industry of tomorrow.

Authors:
 [1]; ORCiD logo [2];  [2]; ORCiD logo [3]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
  2. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  3. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry, Dept. of Physics; Kavli Energy NanoSciences Inst., Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division, Molecular Biophysics and Integrated Bioimaging Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1572854
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Name: Nature Materials; Journal ID: ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing Group
Country of Publication:
United States
Language:
English

Citation Formats

Delor, Milan, Weaver, Hannah L., Yu, QinQin, and Ginsberg, Naomi S. Imaging material functionality through three-dimensional nanoscale tracking of energy flow. United States: N. p., 2019. Web. doi:10.1038/s41563-019-0498-x.
Delor, Milan, Weaver, Hannah L., Yu, QinQin, & Ginsberg, Naomi S. Imaging material functionality through three-dimensional nanoscale tracking of energy flow. United States. doi:10.1038/s41563-019-0498-x.
Delor, Milan, Weaver, Hannah L., Yu, QinQin, and Ginsberg, Naomi S. Mon . "Imaging material functionality through three-dimensional nanoscale tracking of energy flow". United States. doi:10.1038/s41563-019-0498-x.
@article{osti_1572854,
title = {Imaging material functionality through three-dimensional nanoscale tracking of energy flow},
author = {Delor, Milan and Weaver, Hannah L. and Yu, QinQin and Ginsberg, Naomi S.},
abstractNote = {The ability of energy carriers to move between atoms and molecules underlies biochemical and material function. Understanding and controlling energy flow, however, requires observing it on ultrasmall and ultrafast spatio-temporal scales, where energetic and structural roadblocks dictate the fate of energy carriers. Here, we developed a non-invasive optical scheme that leverages non-resonant interferometric scattering to track tiny changes in material polarizability created by energy carriers. We thus map evolving energy carrier distributions in four dimensions of spacetime with few-nanometre lateral precision and directly correlate them with material morphology. We visualize exciton, charge and heat transport in polyacene, silicon and perovskite semiconductors and elucidate how disorder affects energy flow in three dimensions. For example, we show that morphological boundaries in polycrystalline metal halide perovskites possess lateral- and depth-dependent resistivities, blocking lateral transport for surface but not bulk carriers. We also reveal strategies for interpreting energy transport in disordered environments that will direct the design of defect-tolerant materials for the semiconductor industry of tomorrow.},
doi = {10.1038/s41563-019-0498-x},
journal = {Nature Materials},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

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