Wang Cong, Fu Beibei, Zhang Xiaotao, Li Rongjin, Dong Huanli, Hu Wenping
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
ACS Cent Sci. 2020 May 27;6(5):636-652. doi: 10.1021/acscentsci.0c00251. Epub 2020 May 8.
Organic electronics with π-conjugated organic semiconductors are promising candidates for the next electronics revolution. For the conductive channel, the large-area two-dimensional (2D) crystals of organic semiconductors (2DCOS) serve as useful scaffolds for modern organic electronics, benefiting not only from long-range order and low defect density nature but also from unique charge transport characteristic and photoelectrical properties. Meanwhile, the solution process with advantages of cost-effectiveness and room temperature compatibility is the foundation of high-throughput print electrical devices. Herein, we will give an insightful overview to witness the huge advances in 2DCOS over the past decade. First, the typical influencing factors and state-of-the-art assembly strategies of the solution-process for large-area 2DCOS over sub-millimeter even to wafer size are discussed accompanying rational evaluation. Then, the charge transport characteristics and contact resistance of 2DCOS-based transistors are explored. Following this, beyond single transistors, the p-n junction devices and planar integrated circuits based on 2DCOS are also emphasized. Furthermore, the burgeoning phototransistors (OPTs) based on crystals in the 2D limits are elaborated. Next, we emphasized the unique and enhanced photoelectrical properties based on a hybrid system with other 2D van der Waals solids. Finally, frontier insights and opportunities are proposed, promoting further research in this field.
具有π共轭有机半导体的有机电子学有望引发下一次电子学革命。对于导电通道而言，有机半导体的大面积二维（2D）晶体（2DCOS）是现代有机电子学的有用支架，这不仅得益于其长程有序和低缺陷密度的特性，还得益于其独特的电荷传输特性和光电性能。同时，具有成本效益和室温兼容性优势的溶液法是高通量印刷电子器件的基础。在此，我们将进行深入概述，以见证2DCOS在过去十年中的巨大进展。首先，讨论了大面积2DCOS在亚毫米甚至晶圆尺寸上溶液法的典型影响因素和最先进的组装策略，并进行了合理评估。然后，探索了基于2DCOS的晶体管的电荷传输特性和接触电阻。在此之后，除了单个晶体管之外，还强调了基于2DCOS的p-n结器件和平面集成电路。此外，还阐述了基于二维极限晶体的新兴光电晶体管（OPT）。接下来，我们强调了基于与其他二维范德华固体的混合系统的独特且增强的光电性能。最后，提出了前沿见解和机遇，以推动该领域的进一步研究。
