应用于光电子和生物医学先进材料和器件中的发光离子

Luminescence Ions in Advanced Materials and Devices for Optoelectronic and Biomedical Applications

金属离子激活的材料和器件已在科学研究和实际应用领域得到广泛的尝试。荧光离子丰富多彩的发光性质极为令人关注,在多功能应用中起到重要的作用。介绍了研究组的最近几方面的工作。首先,镧系掺杂上转化发光纳米材料作为探针或造影剂可用于包括荧光、MRI、X光和CT等多模式生物成像技术。具有高灵敏度和快速响应的生物传感器,对于以有效方式及时准确地检测各种病毒基因极为重要。开发了上转换荧光纳米生物传感器用于病毒检测。另外,研发了可以探测和获取对各种外界刺激的发光离子掺杂的复合材料。通过将磁场耦合到压电光子学,提出和实现了磁致发光(MIL)。另外,纳米电子和光电子器件的最终目标促进了原子层薄的二维材料研究。通过引入稀土离子到二维半导体实现了上下转换发光。最后,展示了引入金属离子以及环境友好型的摩擦发电机,将环境机械能转换为电能和光发射。这些工作将有助于发展未来能源器件和自驱动传感器。

Metal ions-activated materials and devices have been widely applied in both scientific research and practical fields.The ability of a broad range of luminescent ions to generate fascinating emissions has played important roles in multifunctional applications.Several aspects of my group’s recent works will be introduced in this paper.Firstly,lanthanide-doped upconversion fluorescent nanocrystals as probes or contrast agents are used in multimodal bioimaging techniques,including fluorescence,MRI,X-ray and CT.Biosensors with both high sensitivity and rapid response are greatly desired for enabling rapid and sensitive detection of various virus gene in a cost-effective way.We have developed upconversionnano biosensor for virus detection.Secondly,my group have developed luminescent ion-doped composites,which can sense or harvest various stimuli.Magnetic-induced luminescence(MIL)has been proposed and realized by coupling magnetic field to piezophotonics.Moreover,the ultimate goal of making nanoscale electronic and optoelectronic devices stimulates atomically thin two-dimensional(2D)material research.We have introduced rare-earth dopants into 2D semiconductors and realize down-/up-conversion luminescence.Lastly,we have demonstrated metal ion incorporated and environmentally friendly triboelectricnanogenerators converting ambient mechanical energy into electricity and light-emissions.The works may contribute to future energy devices and self-powered sensors.