DataVXJournal of Materials ResearchPaper
journal article·2009-05

Upconversion luminescence properties of monodisperse spherical Y2O2S:Yb,Ho nanocrystals

Xixian Luo, Wanghe Cao, Mingming Xing

Journal of Materials Research· Volume 24· Issue 5
Publisher page
Source abstract

Abstract

Monodisperse spherical Y2O2S:Yb,Ho nanocrystals with particle size about 50 nm were prepared by a modified homogeneous precipitation method combined with low-temperature sulfurization process. The Y2O2S:Yb,Ho nanocrystals exhibit an intense green emission assigned to the Ho3+ ions 5F4, 5S2 → 4I15/2 transition under 980 nm infrared pump. The upconversion luminescence brightness of Y2O2S:Yb,Ho is 526 Cd/m2 under 4.63 W/cm2 pump density, indicating that the as-prepared Y2O2S:Yb,Ho nanocrystals can meet the requirement of in vivo imaging. The formation mechanism of monodisperse spherical oxysulfide nanoparticles is also discussed.
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Research context

Nanomaterials

OpenAlex topics: Luminescence Properties of Advanced Materials · Optical properties and cooling technologies in crystalline materials · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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