Opposing effects of energy migration and cross-relaxation on surface sensitivity of lanthanide-doped nanocrystals

Jingyue Fan, Liangliang Liang, Yuyang Gu, Xiaogang Liu

Research output: Contribution to journalArticlepeer-review

Abstract

Surface sensitivity of lanthanide-doped nanocrystals has a great utility in controlling their optical properties. Surface sensitivity can be principally promoted by energy migration. Herein, we demonstrate that cross-relaxation between lanthanides makes nanocrystals less sensitive to environmental changes. We show that by codoping ytterbium ions (Yb3+) and neodymium ions (Nd3+) in hexagonal-phase sodium yttrium fluorides, surface sensitivity can be manipulated by energy transfer from Yb3+ to Nd3+. These findings enhance our understanding of surface quenching of nanocrystals and offer new opportunities in developing highly luminous nanoprobes for molecular sensing and biomedical applications.
Original languageEnglish (US)
Pages (from-to)100104
JournalOptical Materials: X
Volume12
DOIs
StatePublished - Oct 12 2021
Externally publishedYes

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