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Frenkel Defect-modulated Anti-thermal Quenching Luminescence in Lanthanide-doped Sc2(WO4)3 |
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| Authors: | Dr Yang Wei Dr Yue Pan Dr Enlong Zhou Dr Ze Yuan Dr Hao Song Dr Yilin Wang Dr Jie Zhou Jiahui Rui Mengjiao Xu Prof Lixin Ning Dr Zhanning Liu Dr Hongyu Wang Prof Xiaoji Xie Prof Xiaobin Tang Prof Haiquan Su Xianran Xing Prof Ling Huang |
| Institution: | 1. Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing, 211816 China
These authors contributed equally to this work.;2. Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing, 211816 China School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 China These authors contributed equally to this work.;3. Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing, 211816 China;4. State Kay Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830046 China;5. Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000 China;6. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid-State Chemistry, University of Science and Technology Beijing, Beijing, 100083 China;7. Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106 China;8. School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021 China |
| Abstract: | Although 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. |
| Keywords: | Downshifting Luminescence Energy Transfer Frenkel Defect Thermal Quenching Upconversion Luminescence |