Single colour luminescence In R³⁺/Yb³⁺/W⁶⁺(R=Tm, Ho, Er)-Doped ZrO₂ Nanoparticles

ABSTRACT

Under 975 nm excitation, the Tm³⁺/Yb³⁺/W⁶⁺, Ho³⁺/Yb³⁺/W⁶⁺, and Er³⁺/Yb³⁺/W⁶⁺ doped ZrO₂ nanoparticles can emit single-colour up-conversion luminescence with high purity. The colour-purity of the three samples are 82%, 93% and 97%, respectively. The strong single-colour up-conversion emission is due to the Yb³⁺-[WO₄]²⁻ dimer. The energy transfers of GSA(|²F_7/2, ¹A₁>→|²F_5/2, ¹A₁>) and ESA(|²F_5/2, ¹A₁>→|²F_7/2, ¹T₁/¹T₂>) play a key role in the up-conversion population processes. The research will be helpful for luminescence labelling, luminescence imaging and colour display domains.

KEYWORDS:

• Nanoparticle
• luminescence imaging
• lanthanide ions

Disclosure statement

No potential conflict of interest was reported by the author(s).