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dc.contributor.authorPenzo, Erika
dc.contributor.authorLoiudice, Anna
dc.contributor.authorBarnard, Edward S.
dc.contributor.authorBorys, Nicholas J.
dc.contributor.authorJurow, Matthew J.
dc.contributor.authorLorenzon, Monica
dc.contributor.authorRajzbaum, Igor
dc.contributor.authorWong, Edward K.
dc.contributor.authorLiu, Yi
dc.contributor.authorSchwartzberg, Adam M.
dc.contributor.authorCabrini, Stefano
dc.contributor.authorWhitelam, Stephen
dc.contributor.authorBuonsanti, Raffaella
dc.contributor.authorWeber-Bargioni, Alexander
dc.identifier.citationPenzo, Erika, Anna Loiudice, Edward S. Barnard, Nicholas J. Borys, Matthew J. Jurow, Monica Lorenzon, Igor Rajzbaum, et al. “Long-Range Exciton Diffusion in Two-Dimensional Assemblies of Cesium Lead Bromide Perovskite Nanocrystals.” ACS Nano 14, no. 6 (May 27, 2020): 6999–7007. doi:10.1021/acsnano.0c01536.en_US
dc.description.abstractFörster resonant energy transfer (FRET)-mediated exciton diffusion through artificial nanoscale building block assemblies could be used as an optoelectronic design element to transport energy. However, so far, nanocrystal (NC) systems supported only diffusion lengths of 30 nm, which are too small to be useful in devices. Here, we demonstrate a FRET-mediated exciton diffusion length of 200 nm with 0.5 cm2/s diffusivity through an ordered, two-dimensional assembly of cesium lead bromide perovskite nanocrystals (CsPbBr3 PNCs). Exciton diffusion was directly measured via steady-state and time-resolved photoluminescence (PL) microscopy, with physical modeling providing deeper insight into the transport process. This exceptionally efficient exciton transport is facilitated by PNCs’ high PL quantum yield, large absorption cross section, and high polarizability, together with minimal energetic and geometric disorder of the assembly. This FRET-mediated exciton diffusion length matches perovskites’ optical absorption depth, thus enabling the design of device architectures with improved performances and providing insight into the high conversion efficiencies of PNC-based optoelectronic devices.en_US
dc.rightsThis document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Nano, copyright © American Chemical Society after peer review. To access the final edited and published work see
dc.titleLong-Range Exciton Diffusion in Two-Dimensional Assemblies of Cesium Lead Bromide Perovskite Nanocrystalsen_US
mus.citation.journaltitleACS Nanoen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US

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