Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141108
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
Begum, Raihana
Bañuls, María José
Bruno, Annalisa
Mathews, Nripan
Mhaisalkar, Subodh
Maquieira, Ángel
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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