skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tailoring Fluorescence Emissions, Quantum Yields, and White Light Emitting from Nitrogen-doped Graphene and Carbon Nitride Quantum Dots

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/C9NR05422G· OSTI ID:1558496
 [1];  [2];  [3]; ORCiD logo [4];  [5];  [6]
  1. Xiamen Univ. of Technology, Xiamen (China)
  2. Yuan Ze Univ., Taoyuan (Taiwan); Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Nanjing Univ. of Science and Technology, Nanjing (China)
  6. National Chiao Tung Univ., Hsinchu (Taiwan)

Highly fluorescent N-doped graphene quantum dots (NGQDs) and graphitic carbon nitride quantum dots (CNQDs, g-C3N4) were synthesized using a solid-phase microwave-assisted (SPMA) technique. The SPMA method, based on the pyrolysis of citric acid and urea with different recipes, is capable of producing quantum dots with coexisting NGQDs and CNQDs at 280°C within only five minutes. The photoluminescence (PL) emissions from NGQD and CNQDs are strongly dependent on excitation wavelength and the solvent type, i.e., water, ethanol, and N-methyl pyrrolidinone. The unique design of the quantum dots possesses a multiple chromophoric band-gap structure, originated from the presence of g-C3N4, defect-related emissive traps, and grain boundaries. Thus, an appropriate excitation wavelength induces a conjugated π electron system to fulfill the most probable absorption band, resulting in wavelength-dependent emissions including ultraviolet, visible and infrared light. Here, the quantum yield of the NGQD and CNQD samples can attain as high as 68.1%. Accordingly, one light-emitting device using the combination of the NGQD and CNQD powders embedded polymeric film can emit white-like light with high power conversion efficiency.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1558496
Journal Information:
Nanoscale, Vol. 11, Issue 35; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

References (59)

Practical access to bandgap-like N-doped carbon dots with dual emission unzipped from PAN@PMMA core–shell nanoparticles journal January 2013
Facile Synthetic Method for Pristine Graphene Quantum Dots and Graphene Oxide Quantum Dots: Origin of Blue and Green Luminescence journal May 2013
Liquid Type Nontoxic Photoluminescent Nanomaterials for High Color Quality White-Light-Emitting Diode journal December 2018
Carbon quantum dots: synthesis, properties and applications journal January 2014
A green heterogeneous synthesis of N-doped carbon dots and their photoluminescence applications in solid and aqueous states journal January 2014
Enhanced photoelectrochemical performance of quantum dot-sensitized TiO 2 nanotube arrays with Al 2 O 3 overcoating by atomic layer deposition journal January 2016
Controlled Formation of Sharp Zigzag and Armchair Edges in Graphitic Nanoribbons journal March 2009
Blue Photoluminescence from Chemically Derived Graphene Oxide journal January 2010
Formation Mechanism of Carbogenic Nanoparticles with Dual Photoluminescence Emission journal December 2011
Amino-functionalized graphene quantum dots: origin of tunable heterogeneous photoluminescence journal January 2014
Anomalous Behaviors of Visible Luminescence from Graphene Quantum Dots: Interplay between Size and Shape journal August 2012
Greenlighting Photoelectrochemical Oxidation of Water by Iron Oxide journal November 2014
Carbon Nanoparticle-based Fluorescent Bioimaging Probes journal March 2013
Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications journal December 2015
Highly efficient photoluminescent graphene oxide with tunable surface properties journal January 2010
A low-temperature solid-phase method to synthesize highly fluorescent carbon nitride dots with tunable emission journal January 2013
Graphene quantum dots and their possible energy applications: A review journal September 2016
Recent advances in graphene quantum dots for sensing journal November 2013
Synthesis of graphene quantum dot/metal–organic framework nanocomposites as yellow phosphors for white light-emitting diodes journal January 2018
Facile One-Pot Synthesis of Nanoporous Carbon Nitride Solids by Using Soft Templates journal April 2010
Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs journal June 2017
Carbon Dots for Optical Imaging in Vivo journal August 2009
Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts journal January 2013
Tailoring the bandgap of N-rich graphitic carbon nitride for enhanced photocatalytic activity journal June 2017
Size-Dependent Evolution of Graphene Nanopores Under Thermal Excitation journal August 2012
Large-Scale Growth and Characterizations of Nitrogen-Doped Monolayer Graphene Sheets journal April 2011
Photocatalytic reduction of carbon dioxide to methanol using a ruthenium trinuclear polyazine complex immobilized on graphene oxide under visible light irradiation journal January 2014
Layer-by-layer assembly of nitrogen-doped graphene quantum dots monolayer decorated one-dimensional semiconductor nanoarchitectures for solar-driven water splitting journal January 2016
Efficiency Enhancement of Perovskite Solar Cells through Fast Electron Extraction: The Role of Graphene Quantum Dots journal February 2014
Graphitic carbon nitride materials: variation of structure and morphology and their use as metal-free catalysts journal January 2008
Photo-Fenton Reaction of Graphene Oxide: A New Strategy to Prepare Graphene Quantum Dots for DNA Cleavage journal July 2012
A facile microwave-assisted fabrication of fluorescent carbon nitride quantum dots and their application in the detection of mercury ions journal December 2015
Luminescent graphene quantum dots as new fluorescent materials for environmental and biological applications journal February 2014
Graphene quantum dots: an emerging material for energy-related applications and beyond journal January 2012
Elucidating Quantum Confinement in Graphene Oxide Dots Based On Excitation-Wavelength-Independent Photoluminescence journal May 2016
Highly efficient carbon quantum dot suspensions and membranes for sensitive/selective detection and adsorption/recovery of mercury ions from aqueous solutions journal July 2019
Selective band gap manipulation of graphene oxide by its reduction with mild reagents journal November 2015
Graphene Quantum Dots Coated VO 2 Arrays for Highly Durable Electrodes for Li and Na Ion Batteries journal December 2014
Deep Ultraviolet to Near-Infrared Emission and Photoresponse in Layered N-Doped Graphene Quantum Dots journal May 2014
Nitrogen-Doped Carbon Dots: A Facile and General Preparation Method, Photoluminescence Investigation, and Imaging Applications journal January 2013
Microwave growth and tunable photoluminescence of nitrogen-doped graphene and carbon nitride quantum dots journal January 2019
Catalyst-Free Growth of Three-Dimensional Graphene Flakes and Graphene/g-C 3 N 4 Composite for Hydrocarbon Oxidation journal February 2016
Nitrogen-Doped ZnO Nanowire Arrays for Photoelectrochemical Water Splitting journal June 2009
Silver nanorods attached to graphene sheets as anode materials for lithium-ion batteries journal October 2013
Significantly enhanced electrochemical performance of lithium titanate anode for lithium ion battery by the hybrid of nitrogen and sulfur co-doped graphene quantum dots journal October 2015
Synthesis and characterization of nitrogen-rich carbon nitride nanobelts by pyrolysis of melamine journal May 2011
Facile bulk production of highly blue fluorescent graphitic carbon nitride quantum dots and their application as highly selective and sensitive sensors for the detection of mercuric and iodide ions in aqueous media journal January 2012
Versatile Graphene Quantum Dots with Tunable Nitrogen Doping journal December 2013
Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution journal January 2014
Surface Chemistry Routes to Modulate the Photoluminescence of Graphene Quantum Dots: From Fluorescence Mechanism to Up-Conversion Bioimaging Applications journal July 2012
Graphene quantum dots: emergent nanolights for bioimaging, sensors, catalysis and photovoltaic devices journal January 2012
Yellow fluorescent graphene quantum dots as a phosphor for white tunable light-emitting diodes journal January 2019
Optical fiber sensor for Hg(II) based on carbon dots journal December 2010
Graphene Quantum Dots Derived from Carbon Fibers journal January 2012
Electrophoretic fabrication of highly robust, efficient, and benign heterojunction photoelectrocatalysts based on graphene-quantum-dot sensitized TiO2 nanotube arrays journal January 2013
Tailoring the Electronic Properties of Graphene Quantum Dots by P Doping and Their Enhanced Performance in Metal-Free Composite Photocatalyst journal December 2017
Focusing on luminescent graphene quantum dots: current status and future perspectives journal January 2013
Principles of fluorescence spectroscopy journal April 1989
Blue photoluminescence from chemically derived graphene oxide preprint January 2009

Similar Records

Microwave growth and tunable photoluminescence of nitrogen-doped graphene and carbon nitride quantum dots
Journal Article · Tue Jan 01 00:00:00 EST 2019 · Journal of Materials Chemistry C · OSTI ID:1558496

Luminescent carbon quantum dots with high quantum yield as a single white converter for white light emitting diodes
Journal Article · Mon Nov 23 00:00:00 EST 2015 · Applied Physics Letters · OSTI ID:1558496

Monolithic phosphor-free InGaN/GaN quantum dot wavelength converter white light emitting diodes
Journal Article · Mon Sep 15 00:00:00 EDT 2014 · Applied Physics Letters · OSTI ID:1558496