Zero thermal-quenching photoluminescence in fresnoite glass achieved with the assistance of carrier compensating and surface crystal clusters

Abstract

Combating the thermal quenching effect and gaining optical parametric amplification are still serious challenges for high-temperature devices due to the huge energy loss caused by nonradiative transition. Herein, a negative thermal-quenching photoluminescence emerged from Eu³⁺-doped fresnoite Ba₂TiSi₂O₈ glass-ceramic surfaces, which exhibited sustained thermal-induced enhancement even when heated over 300 °C. Originating from the possible trap level energy compensation and characterized by the capture and release of carriers, the brighter red-light emissions mainly located at 619 nm (⁵D₀ → ⁷F₂) are expected to meet the operating demands at elevated temperatures; indeed, this good thermal shock resistance shall partially be attributed to surface crystal-cluster defense, which means that the low-frequency rigid units corner-connected with each other suppress the perturbation of interlayer Ba/Eu–O bonds despite alterations in the thermal field. This superficial rigid frame-protected energy transition process is considered as a unique feature in glass while it is hard to be achieved in other luminescent materials.