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Preventing Anion Exchange between Perovskite Nanocrystals by Confinement in Porous SiO(2) Nanobeads
[Image: see text] All-inorganic CsPbX(3) (X = Cl, Br, I) perovskite nanocrystals (NCs) are highly attractive due to their outstanding optical and electrical properties. However, poor stability and easy anion exchanges between CsPbX(3) nanocrystals with different halides limit their applications in l...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6933789/ https://www.ncbi.nlm.nih.gov/pubmed/31891104 http://dx.doi.org/10.1021/acsomega.9b03524 |
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author | Su, Yucong Jing, Qiang Xu, Yue Xing, Xing Lu, Zhenda |
author_facet | Su, Yucong Jing, Qiang Xu, Yue Xing, Xing Lu, Zhenda |
author_sort | Su, Yucong |
collection | PubMed |
description | [Image: see text] All-inorganic CsPbX(3) (X = Cl, Br, I) perovskite nanocrystals (NCs) are highly attractive due to their outstanding optical and electrical properties. However, poor stability and easy anion exchanges between CsPbX(3) nanocrystals with different halides limit their applications in light-emitting diodes (LEDs). To solve the problems, we developed an approach to in situ synthesize CsPbX(3) NCs into porous silica colloidal spheres, which can effectively prevent anion exchange and increase photo stability. Based on our results, we first proved that the anion exchange between CsPbX(3) nanocrystals is mainly driven by physical collision of the nanocrystals, not requiring a bridge such as a solvent. We subsequently used an optimized ratio of green, red, and blue SiO(2)/CsPbX(3) composites as solid-state luminescent materials to fabricate single-layer white light-emitting diodes (WLEDs). No anion exchanges have been observed in the LED fabrication and lighting process. |
format | Online Article Text |
id | pubmed-6933789 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-69337892019-12-30 Preventing Anion Exchange between Perovskite Nanocrystals by Confinement in Porous SiO(2) Nanobeads Su, Yucong Jing, Qiang Xu, Yue Xing, Xing Lu, Zhenda ACS Omega [Image: see text] All-inorganic CsPbX(3) (X = Cl, Br, I) perovskite nanocrystals (NCs) are highly attractive due to their outstanding optical and electrical properties. However, poor stability and easy anion exchanges between CsPbX(3) nanocrystals with different halides limit their applications in light-emitting diodes (LEDs). To solve the problems, we developed an approach to in situ synthesize CsPbX(3) NCs into porous silica colloidal spheres, which can effectively prevent anion exchange and increase photo stability. Based on our results, we first proved that the anion exchange between CsPbX(3) nanocrystals is mainly driven by physical collision of the nanocrystals, not requiring a bridge such as a solvent. We subsequently used an optimized ratio of green, red, and blue SiO(2)/CsPbX(3) composites as solid-state luminescent materials to fabricate single-layer white light-emitting diodes (WLEDs). No anion exchanges have been observed in the LED fabrication and lighting process. American Chemical Society 2019-12-11 /pmc/articles/PMC6933789/ /pubmed/31891104 http://dx.doi.org/10.1021/acsomega.9b03524 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Su, Yucong Jing, Qiang Xu, Yue Xing, Xing Lu, Zhenda Preventing Anion Exchange between Perovskite Nanocrystals by Confinement in Porous SiO(2) Nanobeads |
title | Preventing Anion
Exchange between Perovskite Nanocrystals
by Confinement in Porous SiO(2) Nanobeads |
title_full | Preventing Anion
Exchange between Perovskite Nanocrystals
by Confinement in Porous SiO(2) Nanobeads |
title_fullStr | Preventing Anion
Exchange between Perovskite Nanocrystals
by Confinement in Porous SiO(2) Nanobeads |
title_full_unstemmed | Preventing Anion
Exchange between Perovskite Nanocrystals
by Confinement in Porous SiO(2) Nanobeads |
title_short | Preventing Anion
Exchange between Perovskite Nanocrystals
by Confinement in Porous SiO(2) Nanobeads |
title_sort | preventing anion
exchange between perovskite nanocrystals
by confinement in porous sio(2) nanobeads |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6933789/ https://www.ncbi.nlm.nih.gov/pubmed/31891104 http://dx.doi.org/10.1021/acsomega.9b03524 |
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