报告摘要

Thermal quenching (TQ) has been naturally entangling with luminescence since its discovery, and has severely restrained further applications particularly for lanthanide-based upconversion luminescence (UCL) due to its very low energy conversion efficiency. Various strategies have been developed to realize anti-TQ UCL, such as desorption of adsorbents on upconversion nanoparticles, energy compensation from defects inside crystallographic matrix, selection of hosts with rigid frameworks, and use of activator ions with thermally coupled energy levels by sacrificing the emission intensities of low energy levels. Herein, we will report our efforts on solving this issue and the design principles, so that anti-TQ UCL or even thermally enhanced UCL are realized and their respective applications explored, such as Frenkel-defect assisted anti-TQ UCL; fabrication of positive thermal expansion core/negative thermal expansion shell structure so that giant physical pressure can be generated upon hating, which suppresses the multi-phonon relaxation so that more photons can be used for luminescing; as well as other defects that can also supply energy to counteract that depleted by TQ.

Keywords: Rare Earth, Upconversion Luminescence, Anther-thermal Quenching, Applications

References

Wang, Y.; Rui, J.; Song, H.; Yuan, Z.; Huang, X.; Liu, J.; Zhou, J.; Li, C.; Wang, H.; Wu, S.; Chen, R.; Yang, M.; Gao, Q.; Xing, X.; Huang, L. Antithermal Quenching Upconversion Luminescence via Suppressed Multiphonon Relaxation in Positive/Negative Thermal Expansion Core/Shell NaYF₄:Yb/Ho@ScF₃ Nanoparticles. J. Am. Chem. Soc. 2024, 146, doi.org/10.1021/jacs.3c10886.

Wei, Y.; Pan, Y.; Zhou, E.; Yuan, Z.; Song, H.; Wang, Y.; Zhou, J.; Rui, J.; Xu, M.; Ning, L.; Liu, Z.; Wang, H.; Tang, X.; Su, H.; Xing, X.; Huang, L. Frenkel Defect-Modulated Anti-Thermal Quenching Luminescence in Lanthanide‐Doped Sc₂(WO₄)₃. Angew. Chem. Int. Ed. 2023 62, e202303482.  

个人简介

Dr. Huang obtained his PhD degree in Chemistry from Nanjing University in 2001. He then started post-doc researches at University of California at Berkeley (Gabor Somorjai) working on nanoscaled surface science, Florida State University (Seunghun Hong) working on carbon nanotube assembly, and Northwestern University (Chad Mirkin) working on nanomaterials assembly and nanofabrication. Dr. Huang joined Corning Incorporated (USA) as a Senior Research Scientist in 2008, and started working as Associate Professor at Nanyang Technological University, Singapore, since 2009. Dr. Huang returned to Nanjing Tech University (China) at the beginning of 2013 as a Jiangsu Specially Appointed Professor, and then relocated to Xinjiang University since 2021 with a Changjiang Scholarship. Dr. Huang’s research focuses on rare earth, particularly scandium-based materials and chemistry for luminescence, solid oxide fuel cell, and catalysis.