Zero‐Thermal Quenching of Mn2+ Red Luminescence via Efficient Energy Transfer from Eu2+ in BaMgP2O7

作者：Rui Shi, Lixin Ning, Zhiqiang Wang, Jiatang Chen, T. Sham, Yaoqing Huang, Z. Qi, Cuijin Li, Q. Tang, Hongbin Liang · 发表于：Advanced Optical Materials · 年份：2019 · DOI：10.1002/adom.201901187 · 被引用次数：91 · 研究领域：Materials Science

Mn2+‐activated phosphors usually show green to red luminescence depending on the crystal field strength in the lattice. However, the severe intensity loss of Mn2+ luminescence at elevated temperatures remains to be a serious problem. Here, the observation of zero‐thermal quenching of Mn2+ red luminescence (λem = 620 nm) up to 500 K in Eu2+, Mn2+‐codoped BaMgP2O7 is reported. This phenomenon arises from an efficient energy transfer from sensitizers Eu2+ which, when singly doped, exhibits a substantial thermal‐induced enhancement of 5d→4f emission intensity at 400 nm, along with a high luminescence efficiency and a large UV light absorption capacity. The present results open up a new path to the exploration of Eu2+, Mn2+‐codoped materials for thermally stable red phosphors.