Facile and Purification-Free Synthesis of Nitrogenated Amphiphilic Graphitic Carbon Dots

Title
Facile and Purification-Free Synthesis of Nitrogenated Amphiphilic Graphitic Carbon Dots
Authors
박민김태욱이상현문병준배수강오예린김상진신동헌
Keywords
Graphene Quantum Dots; NItrogenated; Amphiphilic; Purification-Free; Fluorescent
Issue Date
2016-03
Publisher
Chemistry of materials
Citation
VOL 28, NO 5, 1481-1488
Abstract
The emerging carbon-based quantum dots have been attracting attention because of their tremendous potential for optoelectronic and biomedical applications, which is due to their unique and size-tunable optical properties, their ability to be functionalized, and their biocompatibility. Here, we report the facile one-step synthesis of highly fluorescent and amphiphilic n-doped graphitic carbon dots (N-GCDs) using a fumaronitrile (FN) precursor. An interesting property of the prepared GCDs is their near pH neutral dispersibility without refinement, which stands in contrast to reported methods. This finding indicates that our approach could lead to low-cost and efficient processability that is scalable and environmentally friendly. In addition, we find that our N-GCDs have high density of graphitic structure such as sp2-hybridized carbon and tiny amounts of defect by near-edge X-ray absorption fine structure (NEXAFS) results. Finally, to confirm the electro-optical behavior of N-GCDs on photovoltaic devices, we fabricate iPSCs consisting of ITO/PEIE/PTB7:PC71BM (+ N-GCDs)/MoO3/Ag. Using this effective approach, we demonstrate the highest conversion efficiency of ∼8.6% resulting from improved photoresponsibility and charge transport based on various charge and energy transfer dynamics. Also, we believe that the shape, size and functionality of these GCDs can be controlled using other chemical species to provide a variety opportunities for use in optoelectronics, biological applications, and sensors.
URI
http://pubs.kist.re.kr/handle/201004/59135
ISSN
08974756
Appears in Collections:
KIST Publication > Article
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