2026-10-10T16:54:58Z https://www.scidb.cn/oai

10.57760/sciencedb.45030 2026-08-03T17:30:36Z

2026-08-03 Energy Cluster in Fluoride Glass Enabling Enhanced Upconversion Toward Fluorescent Thermometry doi:10.57760/sciencedb.45030 en Upconversion (UC) fluorescence thermometry offers significant potential for biological and industrial monitoring. Fluoride glasses, with low phonon energy and high rare-earth ions solubility, show great promise for UC fluorescence thermometry. However, the trade-off between the enhanced luminescence intensity and poor thermal stability through heavy doping limits their application. In this study, based on structural design, we adopted an isostructural substitution doping strategy to provide a solution for the preparation of thermally stable, highly rare-earth-doped fluoride glass. Furthermore, an energy cluster structure was constructed within the glass phase, achieving a high quenching concentration and enhanced UC luminescence. The resulting ZBEA glass achieved a doping concentration of 9 mol% and exhibited a 350-fold enhancement in blue multiphoton UC emission intensity. This resulted in outstanding temperature sensing performance. By employing two nonthermally coupled levels (4F9/2/2H9/2), display an extraordinarily high absolute sensitivity of 13.3377 K−1 and a comparatively large relative sensitivity of 1.0695% K−1. Furthermore, we constructed the first fluoride-glass-based optical fiber thermometry prototype and successfully achieved stable and sensitive monitoring of diverse environments, respiratory signals, and body temperature. This study highlights the immense potential of fluoride-glass-based temperature sensing materials for application in complex environmental monitoring and human health. fluoride glass; upconversion; thermometry junxin wang chi wang zihua guo longfei zhang jingjing shao yiguang jiang long zhang EMBARGO https://creativecommons.org/licenses/by-nc/4.0/ dataset Science Data Bank