MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Adv Mater. 2017 Apr;29(14). doi: 10.1002/adma.201606101. Epub 2017 Feb 24.
Organic single-crystalline heterojunctions are composed of different single crystals interfaced together. The intrinsic highly ordered heterostructure in these multicomponent solids holds the capacity for multifunctions, as well as superior charge-transporting properties, promising high-performance electronic applications such as ambipolar transistors and solar cells. However, this kind of heterojunction is not easily available and the preparation methods need to be developed. Recent advances in the efficient strategies that have emerged in yielding high-quality single-crystalline heterojunctions are highlighted here. The advantages and limitations of each strategy are also discussed. The obtained single-crystalline heterojunctions have started to exhibit rich physical properties, including metallic conduction, photovoltaic effects, and so on. Further structural optimization of the heterojunctions to accommodate the electronic device configuration is necessary to significantly advance this research direction.
有机单晶异质结由不同的单晶界面连接而成。这些多组分固体中固有的高度有序的异质结构具有多功能的能力，以及优异的电荷输运性能，有望实现高性能的电子应用，如双极晶体管和太阳能电池。然而，这种异质结不容易获得，需要开发制备方法。本文重点介绍了在高效策略方面的最新进展，这些策略能够产生高质量的单晶异质结。还讨论了每种策略的优缺点。所获得的单晶异质结已经开始表现出丰富的物理性质，包括金属导电性、光伏效应等。进一步优化异质结的结构以适应电子器件的配置，对于推动这一研究方向具有重要意义。
