Enhancing upconversion of Nd3+ through Yb^(3+)-mediated energy cycling towards temperature sensing  

作　　者：Nan Song Songbin Liu Peng Zhang Junshan He Qinyuan Zhang Feng Wang Bo Zhou 

机构地区：[1]State Key Laboratory of Luminescent Materials and Devices,Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,South China University of Technology,Guangzhou 510641,China [2]Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong SAR,China

出　　处：《Journal of Rare Earths》2021年第12期1506-1511,I0002,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51972119);the Fundamental Research Funds for the Central Universities(2020ZYGXZR100);the State Key Laboratory of Luminescent Materials and Devices(Skllmd-2021-01);the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01X137);the Research Grants Council of Hong Kong for a General Research Fund(11205219)。

摘　　要：Photon upconversion of lanthanides has been a powerful means to convert low-energy photons into high-energy ones.However,in contrast to the mostly investigated lanthanide ions,it has remained a challenge for the efficient upconversion of Nd^(3+)due to the deleterious concentration quenching effect.Here we report an efficient strategy to enhance the upconversion of Nd^(3+)through the Yb^(3+)-mediated energy cycling in a core-shell-shell nanostructure.Both Nd^(3+)and Yb^(3+)are confined in the interlayer,and the presence of Yb^(3+)in the Nd-sublattice provides a more matched energy for the upconversion transitions occurring at the intermediate state of Nd^(3+)towards much better population at its emissive levels.Moreover,this design also minimizes the possible cross-relaxation processes at both intermediate level and the emissive levels of Nd^(3+)which are the primary factors limiting the upconversion performance for the Nd^(3+)-doped materials.Such energy cycling-enhanced upconversion shows promise in temperature sensing.

关 键 词：UPCONVERSION Nd^(3+) Energy cycling Core-shell nanostructure Temperature sensing Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]