Abstract
We report a facile synthetic method for high-aspect-ratio YF3:Yb3+/Er3+ nanocrystals by controlling the composition of the precursor and salts to manipulate the structures of YF3:Yb3+/Er3+ nanocrystals. A controlled aspect ratio is attained by tuning the molar ratio of NH4+/RE3+ (NH4+ is the counterion released from the fluoride precursor (NH4F) and RE3+ indicates the total amount of Y, Yb, and Er) and the presence of specific inorganic salts. A low molar ratio of NH4+/RE3+ induced the production of high-aspect-ratio YF3:Yb3+/Er3+ nanocrystals, while a high molar ratio of NH4+/RE3+ induced the formation of irregular nanoplates. The selection of the inorganic salt as an additive is critical in controlling the aspect ratio and crystallinity of YF3:Yb3+/Er3+ nanocrystals. The cation showed limited control over the aspect ratio, but the anions, Cl- and Br-, induced the production of the highest aspect ratio for YF3:Yb3+/Er3+ nanocrystals. We found that the aspect ratio affected the luminescence properties of YF3:Yb3+/Er3+ nanocrystals. The green emission from nanorod structures changed to orange when the morphology is transformed to nanoplates.
Original language | English |
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Pages (from-to) | 3055-3061 |
Number of pages | 7 |
Journal | Crystal Growth and Design |
Volume | 17 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2017 Jun 7 |
Bibliographical note
Funding Information:This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2016R1A2B3013825) KU-KIST school project. This research was also supported by Research Base Construction Fund Support Program funded by Chonbuk National University in 2017.
Publisher Copyright:
© 2017 American Chemical Society.
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics