Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb3+/Er3+ Upconversion Nanocrystals

G. Murali, R. K. Mishra, Jae Myeong Lee, Young Cheol Chae, Jongwoo Kim, Yung Doug Suh, Dong-Kwon Lim, Seung Hee Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

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 languageEnglish
Pages (from-to)3055-3061
Number of pages7
JournalCrystal Growth and Design
Volume17
Issue number6
DOIs
Publication statusPublished - 2017 Jun 7

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Nanocrystals
Luminescence
aspect ratio
Aspect ratio
nanocrystals
luminescence
synthesis
high aspect ratio
salts
Salts
nanorods
fluorides
Nanorods
Fluorides
crystallinity
Anions
Cations
tuning
anions
Negative ions

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Murali, G., Mishra, R. K., Lee, J. M., Chae, Y. C., Kim, J., Suh, Y. D., ... Lee, S. H. (2017). Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb3+/Er3+ Upconversion Nanocrystals. Crystal Growth and Design, 17(6), 3055-3061. https://doi.org/10.1021/acs.cgd.6b01803

Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb3+/Er3+ Upconversion Nanocrystals. / Murali, G.; Mishra, R. K.; Lee, Jae Myeong; Chae, Young Cheol; Kim, Jongwoo; Suh, Yung Doug; Lim, Dong-Kwon; Lee, Seung Hee.

In: Crystal Growth and Design, Vol. 17, No. 6, 07.06.2017, p. 3055-3061.

Research output: Contribution to journalArticle

Murali, G. ; Mishra, R. K. ; Lee, Jae Myeong ; Chae, Young Cheol ; Kim, Jongwoo ; Suh, Yung Doug ; Lim, Dong-Kwon ; Lee, Seung Hee. / Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb3+/Er3+ Upconversion Nanocrystals. In: Crystal Growth and Design. 2017 ; Vol. 17, No. 6. pp. 3055-3061.
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