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|Title:||Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes||Authors:||González-Pedro, Victoria
Veldhuis, Sjoerd Antonius
Bañuls, María José
|Keywords:||Engineering::Materials||Issue Date:||2018||Source:||González-Pedro, V., Veldhuis, S. A., Begum, R., Bañuls, M. J., Bruno, A., Mathews, N., . . . Maquieira, Á. (2018). Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes. ACS Energy Letters, 3(6), 1409-1414. doi:10.1021/acsenergylett.8b00498||Journal:||ACS Energy Letters||Abstract:||We report a facile methodology to restore photoluminescence (PL) of CsPbBr3 nanocrystals (NCs) based on their postsynthetic modification with 3-aminopropyltriethoxysilane (APTES). By this methodology, a stark PL recovery factor of near 2-fold was obtained compared to their uncoated counterparts. 1H NMR studies confirmed the presence of APTES on the NCs shell and provided more insight into the nature of the alkoxysilane passivation mechanisms. We further highlight that, contrary to expectations, preferential attachment of APTES does not take place through their amine terminal groups. The proposed surface-repair strategy can be extended to other halide compositions, yielding similarly effective 4-fold and 2-fold PL enhancements for CsPbCl3 and CsPbI3 NCs, respectively. Our work thus exemplifies that careful management of the perovskite NC interfaces and surface engineering is one of the most important frontiers in this emerging class of optoelectronic materials.||URI:||https://hdl.handle.net/10356/141108||ISSN:||2380-8195||DOI:||10.1021/acsenergylett.8b00498||Rights:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsenergylett.8b00498||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||ERI@N Journal Articles|
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