Composite Yttrium-Carbonaceous Spheres Templated Multi-Shell YVO<sub>4</sub> Hollow Spheres with Superior Upconversion Photoluminescence.

Zong, Lingbo; Xu, Jie; Jiang, Shuaiyu; Zhao, Kun; Wang, Zumin; Liu, Porun; Zhao, Huijun; Chen, Jun et al. · Adv Mater · 2017

basic_science · Level V

Where this comes from

Abstract

Complex oxide YVO<sub>4</sub> multi-shell hollow spheres with uniform morphologies and controllable shell numbers are successfully prepared by using a newly developed and general composite yttrium-carbonaceous sphere templated approach. The prominent upconversion luminous intensity of the YVO<sub>4</sub> :Yb<sup>3+</sup> /Er<sup>3+</sup> hollow spheres might be attributed to the enhanced near-infrared excitation light harvesting efficiency originated from the multiple reflections.