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

doi:10.1021/acs.cgd.6b01803

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 journal › Article › peer-review

20 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 language	English
Pages (from-to)	3055-3061
Number of pages	7
Journal	Crystal Growth and Design
Volume	17
Issue number	6
DOIs	https://doi.org/10.1021/acs.cgd.6b01803
Publication status	Published - 2017 Jun 7

ASJC Scopus subject areas

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

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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 journal › Article › peer-review

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

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.",

author = "G. Murali and Mishra, {R. K.} and Lee, {Jae Myeong} and Chae, {Young Cheol} and Jongwoo Kim and Suh, {Yung Doug} and Lim, {Dong Kwon} and Lee, {Seung Hee}",

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: {\textcopyright} 2017 American Chemical Society. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

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doi = "10.1021/acs.cgd.6b01803",

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AU - Chae, Young Cheol

AU - Kim, Jongwoo

AU - Suh, Yung Doug

AU - Lim, Dong Kwon

AU - Lee, Seung Hee

N1 - 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. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

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N2 - 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.

AB - 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.

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

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