He Xiao, Wang Bo, Zhao Xiaoqiang, Ke Fengqin, Feng Wenhui, Wang Liwen, Yang Jiameng, Wen Guangyu, Ji Denghui
Department of Thermal Engineering, Hebei Petroleum University of Technology, Chengde 067000, China.
Hebei Advanced Thin Film Laboratory, College of Physics, Hebei Normal University, Shijiazhuang 050024, China.
Molecules. 2025 Mar 7;30(6):1203. doi: 10.3390/molecules30061203.
Host/guest doping is an effective approach to achieving room-temperature phosphorescence (RTP). However, the influence of the host matrix on doping systems is still unclear, and it is difficult to select the suitable host species for a certain guest emitter. This study prepared a series of host/guest RTP materials with dynamically adjustable time and color by doping a non-RTP guest material in various host materials that were easy to crystallize. The varying afterglow color originated from the difference in Förster energy transfer between the host and guest. Specifically, the change from yellow to green afterglow was realized by varying the host's molecular structure. This study further revealed the importance of proper host energy levels, the ability to generate long-aging triplet excitons, and the Förster energy transfer from host to guest. Additionally, multiple information encryption anti-counterfeiting materials were developed by leveraging the different afterglow colors and durations, reflecting the unique performance advantages of the prepared long-afterglow materials in various RTP applications.
主体/客体掺杂是实现室温磷光（RTP）的一种有效方法。然而，主体基质对掺杂体系的影响仍不明确，且难以针对特定客体发光体选择合适的主体物种。本研究通过将非RTP客体材料掺杂到各种易于结晶的主体材料中，制备了一系列具有动态可调时间和颜色的主体/客体RTP材料。余辉颜色的变化源于主体与客体之间福斯特能量转移的差异。具体而言，通过改变主体的分子结构实现了从黄色到绿色余辉的转变。本研究进一步揭示了合适的主体能级、产生长寿命三重态激子的能力以及从主体到客体的福斯特能量转移的重要性。此外，利用不同的余辉颜色和持续时间开发了多种信息加密防伪材料，体现了所制备的长余辉材料在各种RTP应用中的独特性能优势。
