Synthesis and UC Luminescence Properties of NaYF4:Yb,Er Microsheets

Abstract:

Hexagonal NaYF⁴:Yb³⁺/Er³⁺ microsheets were successfully synthesized via a hydrothermal method assisted by sodium oxalate as a shape modifier. XRD, FE-SEM, TEM and SAED have been used to study the morphologies and crystal structure of the products. The effects of the pH values on the crystal structure, morphology and size were discussed. The hexagonal NaYF⁴:Yb³⁺/Er³⁺ microsheets show characteristic upconversion fluorescence at green (521-540 nm) and red (630-680 nm) corresponding to the 4f-4f transition of Er³⁺. The green and red emission intensity for microsheets has a great increase compared to that for hexagonal microspheres, and the intensity of the green emission is greater than that of the red one.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 326-330
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.326
• Online since: July 2015
• Authors: Zi Biao Lu, Feng Tao, Zhi Jun Wang, Li Liu, Dong Cheng Ruan, Qi Liu, Yu Feng Sun
• Keywords: Er³⁺, Hydrothermal Synthesis, Microsheet, NaYF₄:Yb³⁺, Upconversion

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