Abstract
In this paper, two types of phosphors, Cs3GdGe3O9:Er3+ and Cs3GdGe3O9:Yb3+/Er3+, were synthesized using the high-temperature solid-state method, and a new role for Yb3+ was successfully achieved. The presence of low phonon energy in the matrix and the low energy level mismatch between the 2F5/2 and the 4I11/2 enables the construction of a phonon-assisted channel between Yb3+ and Er3+ through doping with Yb3+ ions. This channel overcomes thermal quenching and achieves thermal enhancement at high temperatures. Additionally, Yb3+ increases the chance of non-radiative transition within the matrix, effectively converting the 980 nm laser into heat energy. This leads to a significant change in the surface temperature of the sample, greatly improving the photothermal conversion efficiency. Moreover, Yb3+ greatly enhances the emission intensity of green light, resulting in a maximum relative sensitivity of 1.11 % K−1 for temperature measurements in the Er3+ single-doped system and 1.28 % K−1 in the Yb3+/Er3+ co-doped system, based on the Er3+ thermally coupled energy level. These results demonstrate that this paper provides a new idea for materials to overcome thermal quenching and improve the efficiency of photothermal conversion and temperature sensing performance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
