Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers

Jiayin Zhang, Feng Qin, Hua Zhao, Xin Yang, Xitian Zhang, Xuanzhang Wang, Hong Gao, Zhiguo Zhang, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A special core/shell/shell structured NaYF4/NaYF4:Yb3+,Er3+/NaYF4 (CSS) nanocrystal was designed to ensure each luminescence center in the emitting shell had the same surroundings. The nanocrystal includes a support core NaYF4 nanoparticle in the center coated by a thin emitting shell NaYF4:Yb3+,Er3+ and another NaYF4 shell with adjustable thickness as the outer shielding shell. The green upconversion fluorescence intensity Ig(d) of the CSS nanoparticles shows an exponential relationship with the thickness d of the shielding shell. When d decreased to 0, Ig(0) was ~356 times smaller than Ig(∞) due to the drastic fluorescence quenching of the rare earth luminescence centers by the surroundings. Our experimental results indicate that ~90% of the severe effect of the surroundings can be eliminated by coating with a ~4 nm-thick NaYF4 shielding shell.

Original languageEnglish (US)
Pages (from-to)9974-9978
Number of pages5
JournalCrystEngComm
Volume16
Issue number43
DOIs
StatePublished - Nov 21 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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