Department of Chemistry, National University of Singapore, Singapore.
Phys Chem Chem Phys. 2012 Nov 7;14(41):14127-41. doi: 10.1039/c2cp41107e.
The interface properties of organic-organic heterojunctions (OOHs), such as interface energy level alignment (ELA), interfacial charge transfer, interface nanostructuring, molecular orientation and so on, play an essential role in determining the device performance for some technologically important organic electronic devices, encompassing organic solar cells, bipolar organic field-effect-transistors, and organic light-emitting-diodes. The aim of this article is to provide a balanced assessment on the understanding of the ELA at the small-molecule based OOH interfaces with well-defined molecular orientation, with particular emphasis on the role of gap states in organic thin films. A generalized picture of gap states determined ELA at the OOH interfaces is provided and their implications in relevant organic electronic devices have been discussed.
有机-有机异质结（OOH）的界面性质，如界面能级排列（ELA）、界面电荷转移、界面纳米结构、分子取向等，对于一些重要的有机电子器件的性能起着至关重要的作用，包括有机太阳能电池、双极有机场效应晶体管和有机发光二极管。本文的目的是对小分子基 OOH 界面的 ELA 进行全面评估，这些界面具有明确的分子取向，特别强调了间隙态在有机薄膜中的作用。提供了一个由间隙态决定 OOH 界面 ELA 的一般性图景，并讨论了它们在相关有机电子器件中的应用。
