|
|||||
|
|
Optical temperature sensing behavior of enhanced green upconversion emissions from Er-Mo:Yb2Ti2O7 nanophosphor |
|
| Authors: | BS CaoAuthor Vitae YY HeAuthor VitaeZQ FengAuthor Vitae YS LiAuthor VitaeB DongAuthor Vitae |
| Affiliation: | a School of Science, Dalian Nationalities University, Dalian 116600, China b State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China c Faculty of Physics, University Duisburg-Essen, Duisburg 47057, Germany d College of Electrical Engineering, Zhejiang University, Hangzhou 310058, China |
| Abstract: | The Er-Mo:Yb2Ti2O7 nanocrystalline phosphor has been prepared by sol-gel method and used as an optical thermometry. By Mo codoping, the green upconversion (UC) emission intensity increased about 250 times than that of Er:Yb2Ti2O7 under a 976 nm laser diode excitation. It indicates that such green enhancement arises from the high excited state energy transfer (HESET) with the |2F7/2, 3T2> state of Yb3+-MoO42− dimer to the 4F7/2 level of Er3+. The fluorescence intensity ratio (FIR) of the two green UC emissions bands was studied as a function of temperature in a range of 290-610 K, and the maximum sensitivity and the temperature resolution were approximately 0.0074 K−1 and 0.1 K, respectively. It suggests that the Er-Mo:Yb2Ti2O7 nanophosphor with a higher green UC emissions efficiency is a promising prototype for applications in optical temperature sensing. |
| Keywords: | Er-Mo:Yb2Ti2O7 Green upconversion emission High energy transfer Optical temperature sensing |
| 本文献已被 ScienceDirect 等数据库收录！ | |