Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Sciences, Tianjin University, No. 92#, Weijin Road, Tianjin, 300072, China.
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, China.
Adv Mater. 2018 Nov;30(44):e1801048. doi: 10.1002/adma.201801048. Epub 2018 Jul 23.
Organic semiconducting single crystals (OSSCs) are ideal candidates for the construction of high-performance optoelectronic devices/circuits and a great platform for fundamental research due to their long-range order, absence of grain boundaries, and extremely low defect density. Impressive improvements have recently been made in organic optoelectronics: the charge-carrier mobility is now over 10 cm V s and the fluorescence efficiency reaches 90% for many OSSCs. Moreover, high mobility and strong emission can be integrated into a single OSSC, for example, showing a mobility of up to 34 cm V s and a photoluminescence yield of 41.2%. These achievements are attributed to the rational design and synthesis of organic semiconductors as well as improvements in preparation technology for crystals, which accelerate the application of OSSCs in devices and circuits, such as organic field-effect transistors, organic photodetectors, organic photovoltaics, organic light-emitting diodes, organic light-emitting transistors, and even electrically pumped organic lasers. In this context, an overview of these fantastic advancements in terms of the fundamental insights into developing high-performance organic semiconductors, efficient strategies for yielding desirable high-quality OSSCs, and their applications in optoelectronic devices and circuits is presented. Finally, an overview of the development of OSSCs along with current challenges and future research directions is provided.
有机半导体单晶（OSSCs）由于其长程有序、无晶界和极低的缺陷密度，是构建高性能光电设备/电路的理想候选材料，也是基础研究的绝佳平台。在有机光电领域，最近取得了令人瞩目的进展：许多 OSSC 的电荷载流子迁移率现已超过 10 cm V s，荧光效率达到 90%。此外，高迁移率和强发射可以集成到单个 OSSC 中，例如，其迁移率高达 34 cm V s，光致发光产率为 41.2%。这些成就归因于有机半导体的合理设计和合成以及晶体制备技术的改进，这加速了 OSSC 在设备和电路中的应用，如有机场效应晶体管、有机光电探测器、有机光伏、有机发光二极管、有机发光晶体管，甚至电泵浦有机激光器。在此背景下，本文全面概述了在开发高性能有机半导体方面的基础研究、获得理想高质量 OSSC 的有效策略，以及它们在光电设备和电路中的应用。最后，本文概述了 OSSC 的发展现状，以及当前的挑战和未来的研究方向。
