Jahanbazi Forough, Mao Yuanbing
Department of Chemistry, Illinois Institute of Technology, 3101 South Dearborn Street, Chicago, Illinois 60616, United States.
Inorg Chem. 2024 May 20;63(20):8989-9001. doi: 10.1021/acs.inorgchem.4c00329. Epub 2024 May 6.
Inorganic phosphor materials often face the common phenomenon of luminescence thermal quenching (TQ), which deteriorates their device performance and consequently limits their applicability for broad applications. Thus, exploring thermally stable and even anti-TQ phosphors is viable to meet the urgent requirements of lighting technology and many other luminescence-based applications. One of the emerging approaches devoted to solving the TQ issue of phosphors, especially at elevated temperatures, is to employ negative thermal expansion (NTE) properties occurring in some unique inorganic materials. The present Review focuses on the progress of exploring NTE-based inorganic phosphor materials that have demonstrated unusual negative TQ with enhancing upconversion and downshift luminescence upon elevating temperature. We have also provided a brief history of exploring NTE phosphors for thermally stable and enhanced emission along with the investigation methods and proposed mechanisms of these unusual phenomena. To summarize, we have further discussed some opportunities and challenges that NTE materials face as host matrixes for anti-TQ phosphors. Overall, the aim of this Review is to stimulate the exploration of new NTE-based inorganic phosphors, the correlation of their fundamental structural changes with varying temperature, and the investigation of their potential for broad applications.
无机磷光材料常常面临发光热猝灭（TQ）这一普遍现象，这会降低其器件性能，进而限制它们在广泛应用中的适用性。因此，探索热稳定甚至抗热猝灭的磷光体对于满足照明技术及许多其他基于发光的应用的迫切需求是可行的。致力于解决磷光体热猝灭问题（尤其是在高温下）的一种新兴方法是利用某些独特无机材料中出现的负热膨胀（NTE）特性。本综述聚焦于探索基于NTE的无机磷光材料的进展，这些材料在升温时表现出异常的负热猝灭，同时上转换和下转换发光增强。我们还简要介绍了探索用于热稳定和增强发射的NTE磷光体的历程，以及这些异常现象的研究方法和提出的机制。总而言之，我们进一步讨论了NTE材料作为抗热猝灭磷光体的主体基质所面临的一些机遇和挑战。总体而言，本综述的目的是激发对新型基于NTE的无机磷光体的探索、其基本结构变化与温度变化的相关性以及对其广泛应用潜力的研究。
