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Constructing Interfacial Energy Transfer for Photon Up‐ and Down‐Conversion from Lanthanides in a Core–Shell Nanostructure
Author(s) -
Zhou Bo,
Tao Lili,
Chai Yang,
Lau Shu Ping,
Zhang Qinyuan,
Tsang Yuen Hong
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201604682
Subject(s) - lanthanide , nanostructure , luminescence , energy transfer , dopant , materials science , nanometre , nanotechnology , photon , nanoparticle , core (optical fiber) , shell (structure) , photoluminescence , photon upconversion , chemical physics , chemistry , optoelectronics , doping , ion , physics , optics , composite material , organic chemistry
We report a new mechanistic strategy for controlling and modifying the photon emission of lanthanides in a core–shell nanostructure by using interfacial energy transfer. By taking advantage of this mechanism with Gd 3+ as the energy donor, we have realized efficient up‐ and down‐converted emissions from a series of lanthanide emitters (Eu 3+ , Tb 3+ , Dy 3+ , and Sm 3+ ) in these core–shell nanoparticles, which do not need a migratory host sublattice. Moreover, we have demonstrated that the Gd 3+ ‐mediated interfacial energy transfer, in contrast to energy migration, is the leading process contributing to the photon emission of lanthanide dopants for the NaGdF 4 @NaGdF 4 core–shell system. Our finding suggests a new direction for research into better control of energy transfer at the nanometer length scale, which would help to stimulate new concepts for designing and improving photon emission of the lanthanide‐based luminescent materials.