Key factors tuning upconversion and near infrared luminescence in nanosized Lu2O3:Er3+,Yb3+

: Paweł Głuchowski, Łukasz Marciniak, Mika Lastusaari, Wiesław Strek

Publisher: ELSEVIER SCIENCE SA

: 2019

: Journal of Alloys and Compounds

: JOURNAL OF ALLOYS AND COMPOUNDS

: J ALLOY COMPD

: 799

: 481

: 494

: 14

: 0925-8388

: 1873-4669

DOI: https://doi.org/10.1016/j.jallcom.2019.05.358

The up-conversion (UC) phenomenon is a well-known process based on anti-Stokes emission observed in materials doped with luminescent ions. Several factors lead to UC and IR colour changes. Usually, various dopants with emission in whole VIS region are used to change colours. This paper is focused on the factors that can change the colour of the Yb - Er UC and IR emission. Complex measurements were done in a wide range of temperatures to check the dependence of several factors on Stokes and anti-Stokes emission of the Lu2O3:Er3+,Yb3+ system. It was found that the size of the grains have the highest impact on the spectroscopic properties of the Lu2O3:Er3+,Yb3+. For the smallest particles also Yb/Er concentration ratio, temperature of the measurement and incident laser power have a great impact on both types of the emission colour. (C) 2019 Elsevier B.V. All rights reserved.