Asymmetrically Functionalized Graphene for Photodependent Diode Rectifying Behavior
Abstract
As an atomically thin sheet of carbon atoms packed in a two-dimensional (2D) honeycomb lattice with excellent electronic, thermal, and mechanical properties, graphene has shown great potential for a wide range of applications. Examples include the use of graphene and its derivatives as transparent conductive electrodes or active materials in solar cells, counter electrodes in dye-sensitized solar cells, electrocatalysts for oxygen reduction in fuel cells, high-performance electrodes in supercapacitors, batteries, actuators, and sensors.[ 1, 2] Of particular interest, Guo et al.[2f] reported a significant advancement in the development of layered graphene/quantum dots for highly efficient solar cells. Stoller et al.[1j] produced graphene-based supercapacitors free from any conducting filler with a specific capacitance of 135 Fg 1 in aqueous electrolytes. We also demonstrated that N-doped graphene could act as a metal-free electrode with a much better electrocatalytic activity, long-term operational stability, and tolerance to crossover effect than platinum for oxygen reduction in alkaline fuel cells.[2b] By using graphene as a superior dimensionally compatible and electrically conductive component, Guo et al.[2g,h] further constructed a smart graphene-based multifunctional biointerface for cell growth as well as in situ selective and quantitative molecular detection. There is now a pressing need to integrate graphene sheets into multidimensional and multifunctional systems with spatially well-defined configurations, and hence integrated systems with a controllable structure and predictable performance. This requires controlled functionalization of graphene sheets at the molecular level, which is still a big challenge.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 06, 2011
- Accession Number
- ADA578851
Entities
People
- Dingshan Yu
- Enoch Nagelli
- Liming Dai
- Rajesh R Naik
Organizations
- Air Force Research Laboratory