Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb-3/Er3+ Upconversion Nanocrystals
- Authors
- Murali, G.; Mishra, R. K.; Lee, Jae Myeong; Chae, Young Cheol; Kim, Jongwoo; Suh, Yung Doug; Lim, Dong-kwon; Lee, Seung Hee
- Issue Date
- 6월-2017
- Publisher
- AMER CHEMICAL SOC
- Citation
- CRYSTAL GROWTH & DESIGN, v.17, no.6, pp.3055 - 3061
- Indexed
- SCIE
SCOPUS
- Journal Title
- CRYSTAL GROWTH & DESIGN
- Volume
- 17
- Number
- 6
- Start Page
- 3055
- End Page
- 3061
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83329
- DOI
- 10.1021/acs.cgd.6b01803
- ISSN
- 1528-7483
- Abstract
- We report a facile synthetic method for high-aspect-ratio YF3:Yb3+/Er3+ nanocrystals by controlling-the composition of the precursor and" saltsto manipulate the structures-of YF3:Yb3+/Er3+ nanocrystals. A controlled aspect ratio is attained by tufting 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 round 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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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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