Size dependent ultraviolet upconversion in single YF 3:Yb 3+/Tm 3+ particles

Zhenyu Liu, Kezhi Zheng, Dan Zhao, Ning Liu, Weiping Qin

Research output: Contribution to journalArticlepeer-review

Abstract

Yb 3+-Tm 3+ codoped YF 3 bulk material was synthesized through a facile high-temperature calcinations method. By grinding and selecting, the particles with different desired sizes in microns were obtained. Under 980 nm excitation, optical upconversion (UC) from near-infrared (NIR) to ultraviolet (UV) was studied for each group of particles for the effect of their size on UC. Comparing with the bulk sample, the micro-size particles exhibited strong ability for NIR-to-UV UC. With the particle size decreasing from 800 μm to 20 μm, their UV emission intensities increased rapidly. Two possible mechanisms were proposed and discussed for clarifying the small size effect (SSE).

Original languageEnglish
Pages (from-to)9584-9587
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number11
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • Near-Infrared
  • Single Particle
  • Small Size Effect
  • Ultraviolet
  • Upconversion

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