Frenkel Defect‐modulated Anti‐thermal Quenching Luminescence in Lanthanide‐doped Sc2(WO4)3

Author:

Wei Yang1,Pan Yue12,Zhou Enlong1,Yuan Ze1,Song Hao1,Wang Yilin1,Zhou Jie1,Rui Jiahui1,Xu Mengjiao3,Ning Lixin4,Liu Zhanning5,Wang Hongyu6,Xie Xiaoji1,Tang Xiaobin6,Su Haiquan2,Xing Xianran5,Huang Ling13ORCID

Affiliation:

1. Institute of Advanced Materials (IAM) Nanjing Tech University Nanjing 211816 China

2. School of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China

3. State Kay Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University Urumqi 830046 China

4. Anhui Key Laboratory of Optoelectric Materials Science and Technology Department of Physics Anhui Normal University Wuhu Anhui 241000 China

5. Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid-State Chemistry University of Science and Technology Beijing Beijing 100083 China

6. Department of Nuclear Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211106 China

Abstract

AbstractAlthough large amount of effort has been invested in combating thermal quenching that severely degrades the performance of luminescent materials particularly at high temperatures, not much affirmative progress has been realized. Herein, we demonstrate that the Frenkel defect formed via controlled annealing of Sc2(WO4)3:Ln (Ln=Yb, Er, Eu, Tb, Sm), can work as energy reservoir and back‐transfer the stored excitation energy to Ln3+ upon heating. Therefore, except routine anti‐thermal quenching, thermally enhanced 415‐fold downshifting and 405‐fold upconversion luminescence are even obtained in Sc2(WO4)3:Yb/Er, which has set a record of both the Yb3+‐Er3+ energy transfer efficiency (>85 %) and the working temperature at 500 and 1073 K, respectively. Moreover, this design strategy is extendable to other hosts possessing Frenkel defect, and modulation of which directly determines whether enhanced or decreased luminescence can be obtained. This discovery has paved new avenues to reliable generation of high‐temperature luminescence.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Chemistry,Catalysis

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