Vietnam Journal of Science, Technology and Engineering (Sep 2017)

Synthesis, characterization and up-conversion luminescence properties of α -NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals

  • Thi Kieu Giang Lam,
  • Lukasz Marciniak,
  • Quang Huy Tran,
  • Manh Tien Dinh,
  • Duc Chinh Vu,
  • Vu Nguyen,
  • Thu Huong Tran,
  • Thi Khuyen Hoang,
  • Thanh Huong Nguyen,
  • Duc Roan Pham,
  • Thanh Binh Nguyen,
  • Quoc Minh Le

DOI
https://doi.org/10.31276/VJSTE.59(3).79
Journal volume & issue
Vol. 59, no. 3

Abstract

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The precursor PVP-capped α -NaYF4:Yb3+/Er3+ nanospheres were used as the templates for preparing the α -NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals with a self-template method. By using iron (III) carboxylate and zeolitic imidazolate frameworks dissolved in dimethylformamide (DMF) solution containing 25% of diethylene glycol (DEG), the sphericalshaped α -NaYF4:Yb3+/Er3+/PVP/MIL-100 and α -NaYF4:Yb3+/Er3+/PVP/ ZIF-8 multilayer nanocrystals were successfully prepared with the sizes of 300-500 nm at 100oC for one hour. Under a 976 nm laser excitation at room temperature, the α -NaYF4:Yb3+/Er3+/PVP/MIL-100 and α-NaYF4:Yb3+/ Er3+/PVP/ZIF-8 multilayer nanocrystals exhibited strong up-conversion luminescence with three emission bands centered at around 520 nm, 540 nm, and 655 nm corresponding to 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 transitions of Er3+ ions, respectively.

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