Synthesis of green emission upconversion phosphor nanosheets (LaNb2O7) doped with Er3+ and Yb3+

Soichi Takasugi, Riku Iida, Koji Tomita*, Michio Iwaoka, Kiyofumi Katagiri, Minoru Osada, Masato Kakihana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


LaNb2O7:Er3+,Yb3+ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb2O7:Er3+,Yb3+ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb2O7:Er3+,Yb3+. The UPC emission intensities of the nanosheets dispersed in different solvents (H2O, D2O, CH3OH, CH2Cl2, and CCl4) were measured, and the intensities were observed to decrease in the order CCl4>CH2Cl2>D2O>CH3OH>H2O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy.

Original languageEnglish
Pages (from-to)130-134
Number of pages5
JournalJournal of Luminescence
Publication statusPublished - 2016 May 1
Externally publishedYes


  • Energy transfer
  • Inorganic nanosheet
  • Softbreakdown
  • Upconversionphosphor

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Chemistry(all)
  • Biochemistry
  • Biophysics


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