Issue 44, 2015

A strategy for enhancing the sensitivity of optical thermometers in β-NaLuF4:Yb3+/Er3+ nanocrystals

Abstract

A strategy for enhancing the sensitivity of optical thermometers is developed herein by using non-thermally coupled levels of Er3+. Under the excitation of a 980 nm laser, the temperature dependence of 244 nm and 256 nm upconversion luminescences (UCLs) of Er3+ was studied. The corresponding 2I11/2 and 4D7/2 levels were confirmed to be non-thermally coupled levels. By using the fluorescence intensity ratio (FIR) technique and by investigating different thermal population behaviors of 2I11/2 and 4D7/2 levels, the optical temperature sensing performance based on the non-thermally coupled levels of Er3+ was fulfilled here for the first time. The obtained maximum sensor sensitivity is 0.106 K−1 at 525 K, which is much higher than those of all other RE3+ doped optical thermometers using the thermally coupled level-based FIR technique. This suggests that the use of the FIR from neighboring non-thermally coupled levels of RE3+ is a promising approach for enhancing the sensor sensitivity of optical thermometers.

Graphical abstract: A strategy for enhancing the sensitivity of optical thermometers in β-NaLuF4:Yb3+/Er3+ nanocrystals

Associated articles

Article information

Article type
Paper
Submitted
25 Eost 2015
Accepted
06 Here 2015
First published
08 Here 2015

J. Mater. Chem. C, 2015,3, 11589-11594

Author version available

A strategy for enhancing the sensitivity of optical thermometers in β-NaLuF4:Yb3+/Er3+ nanocrystals

K. Zheng, G. He, W. Song, X. Bi and W. Qin, J. Mater. Chem. C, 2015, 3, 11589 DOI: 10.1039/C5TC02640G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements