Elimination of Photon Quenching by a Transition Layer to Fabricate a Quenching‐Shield Sandwich Structure for 800 nm Excited Upconversion Luminescence of Nd 3+ ‐Sensitized Nanoparticles

作者：Yeteng Zhong, Gan Tian, Zhanjun Gu, Yijun Yang, Lin Gu, Yuliang Zhao, Ying Ma, Jiannian Yao · 发表于：Advanced Materials · 年份：2013 · DOI：10.1002/adma.201304903 · 被引用次数：449 · 研究领域：Luminescence Properties of Advanced Materials、Luminescence and Fluorescent Materials、Radiation Detection and Scintillator Technologies

Nd3+-sensitized quenching-shield sandwich-structured upconversion nanoparticles are reported, which exhibit highly efficient upconversion photoluminescence under excitation by an 800 nm continuous-wave laser. The transition-layer structure is essential to bridge energy transfer from the sensitizer to the activator and simultaneously block energy back-transfer from the activator to the sensitizer. These 800 nm-excited upconversion nanoparticles are a key step toward the development of upconversion nanophosphors for biological applications.