Organic near-infrared functional materials: synthesis, property and potential applications

有机材料正被用于或探索用于光电子器件，如发光二极管、液晶显示器和光伏器件，这些器件主要在可见光区域(约400-800 nm)运行和性能最佳。另一方面，能够在近红外区(约800-2000 nm)采集和产生光的有机化合物和聚合物正在成为一类新的光电材料。这主要是因为它们在电信(1300-1600 nm)、热成像(&gt；1500 nm)、生物成像(800-1100 nm)和全光谱太阳能电池(400-800 nm和800-2000 nm)方面的独特性质和可预见的应用。我们的总体目标是了解分子结构、性质和器件性能之间的潜在关系，开发一类新兴的有机近红外材料，既用于基础研究，又用于实际用途。本研究致力于合成和研究在近红外光谱区(800-2000 nm)具有独特电致变色、光致发光、电致发光、热致变色、压电变色、光伏和手性开关特性的新型有机和聚合物材料。将研究外界刺激(例如，光、热、压力或分子)引起的吸收、荧光和手性特性的变化。这些有机近红外材料将被探索以开发新的验证概念器件，如近红外反射器、近红外发光二极管、近红外光电探测器、分子存储器件、光开关和生物/化学传感器。此外，该研究计划旨在培养对现代科学技术的欣赏，开发新兴有机材料的创新培训模块，并吸引学生进入新兴的有机/聚合物电子和光子学领域。这些学生将接受培训，以获得先进的合成化学知识，并在材料加工、器件制造和测试方面拥有实践经验。

Organic materials are being used or explored for use in optoelectronic devices such as light-emitting diode, liquid-crystal display and photovoltaic device that are mainly operated and best performed in the visible region (ca., 400-800 nm). On the other hand, organic compounds and polymers that can harvest and produce light in the near-infrared (NIR) region (ca., 800-2000 nm) are emerging as a new class of optoelectronic materials. This is mainly because of their unique properties and foreseeable applications in telecommunications (1300-1600 nm), thermal imaging (>1500 nm), biological imaging (800-1100 nm), and full-spectrum solar cells (400-800 nm and 800-2000 nm).    Our overall objectives are to understand the underlying relationships between molecular structures, properties and device performance and to develop an emerging class of organic NIR materials for both fundamental studies and practical uses. The proposed research focuses on the synthesis and study of novel organic and polymeric materials with unique tunable electrochromic, photoluminescent, electroluminescent, thermochromic, piezochromic, photovoltaic, and chiroptical switching properties in the NIR spectral region (800-2000 nm). Changes in absorbing, fluorescent and chiroptical properties induced by external stimuli (e.g., light, heat, pressure or molecule) will be studied. These organic NIR materials will be explored to develop new proof-concept devices, such as NIR reflectors, NIR light-emitting diodes, and NIR photodetectors, molecular memory devices, optical switches, and bio/chemo-sensors.    The research program is designed to nurture an appreciation for modern science and technology, develop innovative training modules in emerging organic materials, and to attract students into the emerging field of organic/polymeric electronics and photonics. The students will be trained to gain knowledge in advanced synthetic chemistry, and have hands-on experience in material processing, device fabrication and testing.