Synthesis, characterization and upconversion emission properties of the nanocrystals of Yb³⁺/Er³⁺-codoped YF₃–YOF–Y₂O₃ system

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• 作者：Zhihua Li ; Longzhen Zheng ; Luning Zhang ; Leyan Xiong
• 关键词：Up-conversion ; Host materials ; Lanthanides ; Pyrolysis ; Emissions
• 刊名：Journal of Luminescence
• 出版年：2007
• 出版时间：October 2007
• 年：2007
• 卷：126
• 期：2
• 页码：481-486
• 全文大小：485 K

文摘

Nanocrystalline Yb³⁺, Er³⁺-codoped fluoride (YF₃), oxyfluoride (YOF), and oxide (Y₂O₃) phosphors have been synthesized by a facile pyrolysis of a yttrium trifluoroacetate precursor. YF₃, YOF and Y₂O₃ nanoparticles were demonstrated to be good host materials for lanthanides. Varied hosts led to different optical properties. Red, green, and blue up-conversion (UC) was observed upon excitation in the NIR spectral range in all synthesized compounds. The UC mechanisms were also analyzed.