• 文献标题:   Coexistence of Urbach-Tail-Like Localized States and Metallic Conduction Channels in Nitrogen-Doped 3D Curved Graphene
  • 文献类型:   Article
  • 作  者:   TANABE Y, ITO Y, SUGAWARA K, JEONG S, OHTO T, NISHIUCHI T, KAWADA N, KIMURA S, ALEMAN CF, TAKAHASHI T, KOTANI M, CHEN MW
  • 作者关键词:   3d curved surface, electrical transport, graphene, nitrogen doping, urbach tail
  • 出版物名称:   ADVANCED MATERIALS
  • ISSN:   0935-9648 EI 1521-4095
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1002/adma.202205986 EA NOV 2022
  • 出版年:   2022

▎ 摘  要

Nitrogen (N) doping is one of the most effective approaches to tailor the chemical and physical properties of graphene. By the interplay between N dopants and 3D curvature of graphene lattices, N-doped 3D graphene displays superior performance in electrocatalysis and solar-energy harvesting for energy and environmental applications. However, the electrical transport properties and the electronic states, which are the key factors to understand the origins of the N-doping effect in 3D graphene, are still missing. The electronic properties of N-doped 3D graphene are systematically investigated by an electric-double-layer transistor method. It is demonstrated that Urbach-tail-like localized states are located around the neutral point of N-doped 3D graphene with the background metallic transport channels. The dual nature of electronic states, generated by the synergistic effect of N dopants and 3D curvature of graphene, can be the electronic origin of the high electrocatalysis, enhanced molecular adsorption, and light absorption of N-doped 3D graphene.