Middha Eshu, Liu Bin
Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Engineering Drive 4, Singapore 117585.
ACS Nano. 2020 Aug 25;14(8):9228-9242. doi: 10.1021/acsnano.0c02651. Epub 2020 Aug 4.
Organic electronic materials play important roles in modern electronic devices such as light-emitting diodes, solar cells, and transistors. Upon interaction with light, these optically active materials can undergo different photophysical and photochemical pathways, providing unique opportunities for optimization of light emission radiative decay, heat generation nonradiative decay, and singlet oxygen production or phosphorescence emission intersystem crossing, all of which open alternative opportunities for their applications in sensing, imaging, and therapy. In this Perspective, we discuss all of the pathways that determine the optical properties of high-performance organic electronic materials, focusing on the optimization of each pathway for photogeneration and relaxation of electronic excited states. We also examine nanoparticle (NP) fabrication techniques tailored to macromolecules and small molecules to render them into NPs with optimized size and distribution for biomedical applications and endow organic electronic materials with water dispersibility and biocompatibility. Lastly, we illustrate the and applications of some representative organic electronic materials after optimization of each relaxation pathway.
有机电子材料在现代电子设备中发挥着重要作用，如发光二极管、太阳能电池和晶体管。与光相互作用时，这些光学活性材料可经历不同的光物理和光化学途径，为优化发光（辐射衰变）、发热（非辐射衰变）以及单线态氧生成或磷光发射（系间窜越）提供了独特机会，所有这些都为其在传感、成像和治疗中的应用开辟了替代途径。在本综述中，我们讨论了决定高性能有机电子材料光学性质的所有途径，重点关注光生和电子激发态弛豫各途径的优化。我们还研究了针对大分子和小分子的纳米颗粒（NP）制备技术，使其成为具有优化尺寸和分布的NP用于生物医学应用，并赋予有机电子材料水分散性和生物相容性。最后，我们阐述了在优化各弛豫途径后一些代表性有机电子材料的传感和成像应用。
