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
2013; Volume: 26; Issue: 18 Linguagem: Inglês
10.1002/adma.201304903
ISSN1521-4095
AutoresYeteng Zhong, Gan Tian, Zhanjun Gu, Yijun Yang, Lin Gu, Yuliang Zhao, Ying Ma, Jiannian Yao,
Tópico(s)Radiation Detection and Scintillator Technologies
ResumoNd3+-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.
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