Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes
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...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/141108 |
| _version_ | 1826119190838247424 |
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| author | González-Pedro, Victoria Veldhuis, Sjoerd Antonius Begum, Raihana Bañuls, María José Bruno, Annalisa Mathews, Nripan Mhaisalkar, Subodh Maquieira, Ángel |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering González-Pedro, Victoria Veldhuis, Sjoerd Antonius Begum, Raihana Bañuls, María José Bruno, Annalisa Mathews, Nripan Mhaisalkar, Subodh Maquieira, Ángel |
| author_sort | González-Pedro, Victoria |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T04:55:44Z |
| format | Journal Article |
| id | ntu-10356/141108 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:55:44Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1411082021-01-14T07:21:59Z Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes González-Pedro, Victoria Veldhuis, Sjoerd Antonius Begum, Raihana Bañuls, María José Bruno, Annalisa Mathews, Nripan Mhaisalkar, Subodh Maquieira, Ángel School of Materials Science and Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Materials Group 14 Compounds Inorganic Compounds 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. NRF (Natl Research Foundation, S’pore) Accepted version 2020-06-04T03:15:29Z 2020-06-04T03:15:29Z 2018 Journal Article 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 2380-8195 https://hdl.handle.net/10356/141108 10.1021/acsenergylett.8b00498 2-s2.0-85047486517 6 3 1409 1414 en ACS Energy Letters 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 application/pdf |
| spellingShingle | Engineering::Materials Group 14 Compounds Inorganic Compounds González-Pedro, Victoria Veldhuis, Sjoerd Antonius Begum, Raihana Bañuls, María José Bruno, Annalisa Mathews, Nripan Mhaisalkar, Subodh Maquieira, Ángel Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title | Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title_full | Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title_fullStr | Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title_full_unstemmed | Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title_short | Recovery of shallow charge-trapping defects in CsPbX3 nanocrystals through specific binding and encapsulation with amino-functionalized silanes |
| title_sort | recovery of shallow charge trapping defects in cspbx3 nanocrystals through specific binding and encapsulation with amino functionalized silanes |
| topic | Engineering::Materials Group 14 Compounds Inorganic Compounds |
| url | https://hdl.handle.net/10356/141108 |
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