• 文献标题:   Effect of charge-transfer complex on the energy level alignment between graphene and organic molecules
  • 文献类型:   Article
  • 作  者:   BAE G, JUNG H, PARK N, PARK J, HONG S, PARK W
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   Ulsan Natl Inst Sci Technol
  • 被引频次:   4
  • DOI:   10.1063/1.4709428
  • 出版年:   2012

▎ 摘  要

We performed density-functional theory calculations to study the electronic structures at the interfaces between graphene and organic molecules that have been used in organic light-emitting diodes. In terms of work function, graphene itself is not favorable as either anode or cathode for commonly used electron or hole transport molecular species. However, the formation of charge transfer complex on the chemically inert sp(2) carbon surface can provide a particular advantage. Unlike metal surfaces, the graphene surface remains non-bonded to electron-accepting molecules even after electron transfer, inducing an improved Fermi-level alignment with the highest-occupied-molecular-orbital level of the hole-injecting-layer molecules. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709428]