Liu Yu-Hang, Yan Tian-Yu, Dong Meng-Han, Yu Fang-Jing, Cao Hong, Xiao Li, Han Yong-Fang, Kong Xiang-Wen, Lei Xiao-Wu
Research Institute of Optoelectronic Functional Materials, School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, PR China; College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, PR China.
Research Institute of Optoelectronic Functional Materials, School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, PR China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):141-151. doi: 10.1016/j.jcis.2024.08.135. Epub 2024 Aug 19.
Luminescent materials with engineered optical properties play an important role in anti-counterfeiting and information security technology. However, conventional luminescent coding is limited by fluorescence color or intensity, and high-level multi-dimensional luminescent encryption technology remains a critically challenging goal in different scenarios. To improve the encoding capacity, we present an optical multiplexing concept by synchronously manipulating the emission color and decay lifetimes of room-temperature phosphorescence materials at molecular level. Herein, we devise a family of zero-dimensional (0D) hybrid metal halides by combining organic phosphonium cations and metal halide tetrahedral anions as independent luminescent centers, which display blue phosphorescence and green persistent afterglow with the highest quantum yields of 39.9 % and 57.3 %, respectively. Significantly, the luminescence lifetime can be fine-tuned in the range of 0.0968-0.5046 μs and 33.46-125.61 ms as temporary time coding through precisely controlling the heavy atomic effect and inter-molecular interactions. As a consequence, synchronous blue phosphorescence and green afterglow are integrated into one 0D halide platform with adjustable emission lifetime acting as color- and time-resolved dual RTP materials, which realize the multiple applications in high-level anti-counterfeiting and information storage. The color-lifetime-dual-resolved encoding ability greatly broadens the scope of luminescent halide materials for optical multiplexing applications.
具有工程光学特性的发光材料在防伪和信息安全技术中发挥着重要作用。然而，传统的发光编码受到荧光颜色或强度的限制，在不同场景下，高级多维发光加密技术仍然是一个极具挑战性的目标。为了提高编码能力，我们在分子水平上通过同步操纵室温磷光材料的发射颜色和衰减寿命，提出了一种光学复用概念。在此，我们通过将有机磷阳离子和金属卤化物四面体阴离子组合作为独立的发光中心，设计了一系列零维（0D）混合金属卤化物，它们分别显示出蓝色磷光和绿色持续余辉，最高量子产率分别为39.9%和57.3%。值得注意的是，通过精确控制重原子效应和分子间相互作用，发光寿命可以在0.0968 - 0.5046 μs和33.46 - 125.61 ms范围内进行微调，作为临时时间编码。因此，同步蓝色磷光和绿色余辉被集成到一个0D卤化物平台中，具有可调节的发射寿命，作为颜色和时间分辨的双室温磷光材料，实现了在高级防伪和信息存储中的多种应用。颜色-寿命双分辨编码能力极大地拓宽了用于光学复用应用的发光卤化物材料的范围。
