Contactless measurements of photocarrier transport properties in perovskite single crystals

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dc.contributor.authorGong, Xiwen
dc.contributor.authorHuang, Ziru
dc.contributor.authorSabatini, Randy
dc.contributor.authorTan, Chih-Shan
dc.contributor.authorBappi, Golam
dc.contributor.authorWalters, Grant
dc.contributor.authorProppe, Andrew
dc.contributor.authorSaidaminov, Makhsud I.
dc.contributor.authorVoznyy, Oleksandr
dc.contributor.authorKelley, Shana O.
dc.contributor.authorSargent, Edward H.
dc.date.accessioned2025-01-23T18:38:36Z
dc.date.available2025-01-23T18:38:36Z
dc.date.issued2019
dc.description.abstractThe remarkable properties of metal halide perovskites arising from their impressive charge carrier diffusion lengths have led to rapid advances in solution-processed optoelectronics. Unfortunately, diffusion lengths reported in perovskite single crystals have ranged widely – from 3 μm to 3 mm – for ostensibly similar materials. Here we report a contactless method to measure the carrier mobility and further extract the diffusion length: our approach avoids both the effects of contact resistance and those of high electric field. We vary the density of quenchers – epitaxially included within perovskite single crystals – and report the dependence of excited state lifetime in the perovskite on inter-quencher spacing. Our results are repeatable and self-consistent (i.e. they agree on diffusion length for many different quencher concentrations) to within± 6%. Using this method, we obtain a diffusion length in metal-halide perovskites of 2.6 μm± 0.1 μm.
dc.description.reviewstatusReviewed
dc.description.scholarlevelFaculty
dc.description.sponsorshipThis publication is based in part on work supported by the US Department of the Navy, Office of Naval Research (Grant Award No.: N00014-17-1-2524), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The authors thank L. Levina for the assistance in CQDs synthesis, A. Lough, Y. Gao for single crystal XRD, P. Brodersen for TOF-SIMS and E. Palmiano, R. Wolowiec, and D. Kopilovic for their help during the course of study. X.G. thanks Mitacs for a Globalink Graduate Fellowship Award. M.I.S. acknowledges the support of the Banting Postdoctoral Fellowship Program, administered by the Government of Canada.
dc.identifier.citationGong, X., Huang, Z., Sabatini, R., Tan, C., Bappi, G., Walters, G., Proppe, A., Saidaminov, M. I., Voznyy, O., Kelley, S. O., & Sargent, E. H. (2019). Contactless measurements of photocarrier transport properties in perovskite single crystals. Nature Communications, 10(1). https://doi.org/10.1038/s41467-019-09538-7
dc.identifier.urihttps://doi.org/10.1038/s41467-019-09538-7
dc.identifier.urihttps://hdl.handle.net/1828/20994
dc.language.isoen
dc.publisherNature Communications
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.departmentDepartment of Chemistry
dc.subject.departmentDepartment of Electrical and Computer Engineering
dc.titleContactless measurements of photocarrier transport properties in perovskite single crystals
dc.typeArticle

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