Multicolour light emission from chlorine-doped graphene quantum dots

@article{Xueming2013MulticolourLE,
  title={Multicolour light emission from chlorine-doped graphene quantum dots},
  author={Liu Xueming and Shu Ping Lau and Libin Tang and Rong-bin Ji and Pei-zhi Yang},
  journal={Journal of Materials Chemistry C},
  year={2013},
  volume={1},
  pages={7308-7313}
}
Multicolour emission is realized in chlorine-doped GQDs (Cl-GQDs) prepared by a facile hydrothermal method using fructose and hydrochloric acid as source materials. The average diameter of a Cl-GQD is about 5.4 nm with 2 at.% Cl. The emission colour of the Cl-GQDs can be tuned successively from blue to white, orange, green and red simply by varying the excitation wavelength between 300 and 600 nm. The multicolour emission from the Cl-GQDs can be attributed to Cl doping, which introduces… Expand
Synthesis and luminescence of ceria decorated graphene quantum dots (GQDs): Evolution of band gap
ABSTRACT Graphene quantum dots (GQDs) and CeO2-GQDs were synthesized by using a facile hydrothermal method at 140°C. All the synthesized materials were characterized by TEM, UV-Vis Spectroscopy,Expand
Tuning the Photoluminescence of Graphene Quantum Dots by Fluorination
Fluorinated graphene quantum dots (F-GQDs) were prepared by mixing GQDs and XeF2 in a facile gaseous phase heating method. The F-GQDs with excellent water solubility have a F/C atomic ratio of 84.25%Expand
Multicolour nitrogen-doped carbon dots: tunable photoluminescence and sandwich fluorescent glass-based light-emitting diodes.
TLDR
To avoid aggregation-induced solid-state fluorescence quenching, multicolour CD-based sandwich glasses with various colour emission was fabricated, which is anticipated to be compatible with the all-optical light-emitting diodes (LEDs). Expand
High fluorescent sulfur regulating graphene quantum dots with tunable photoluminescence properties.
  • Yi Luo, Ming Li, +7 authors Liang Wang
  • Medicine, Materials Science
  • Journal of colloid and interface science
  • 2018
TLDR
The S-GQDs exhibit overwhelming high fluorescence quantum yield and excitation-independent emission, resulting from the outcome of the doped sulfur atoms, and the PL intensity of GQDs can be increased by doping it with S and the increasing efficiency depends on the thiophene sulfur content. Expand
Size Effect of Graphene Quantum Dots on Photoluminescence
TLDR
High-photoluminescence graphene quantum dots were synthesized by a simple one-pot hydrothermal process, then separated by dialysis bags of different molecular weights to reveal the most energetic PL intensity in four separated GQDs. Expand
Facile synthesis and photoluminescence characteristics of blue-emitting nitrogen-doped graphene quantum dots.
TLDR
It is initially believed that synthesis parameters, hydrothermal process and nitrogen doping may greatly influence the surface state and bandgap of the GQDs, which are important in determining the PL characteristics of the N-GQDs. Expand
Synthesis, applications and potential photoluminescence mechanism of spectrally tunable carbon dots.
TLDR
This mini-review summarizes recent progress in studies of multicolor carbon dots focusing on potential photoluminescence (PL) mechanisms, strategies for effective syntheses, and applications in ion/molecule and temperature sensing, light emitting diodes and high-resolution bioimaging techniques. Expand
Direct white emissive Cl-doped graphene quantum dots-based flexible film as a single luminophore for remote tunable UV-WLEDs
Abstract Herein we first report new chlorine-doped graphene quantum dots (Cl-GQDs) that can be used in solid-state white-light-emitting diodes (WLEDs). The Cl-GQDs with a mean size of 1.53 nm areExpand
Synthesis of fluorinated and nonfluorinated graphene quantum dots through a new top-down strategy for long-time cellular imaging.
TLDR
In the fluorinated GQDs, the protective shell supplied by fluorine improves the pH stability of photoluminescence and the strong electron-withdrawing group, -F, reduces the π-electron density of the aromatic structure; thus inhibiting reactivity toward singlet oxygen produced during irradiation and improving the photostability. Expand
One-Step Synthesis of Nitrogen and Chlorine Co-Doped Carbon Quantum Dots for Detection of Fe3+
An environment friendly, economic and maneuverable hydrothermal method was proposed for fabrication of nitrogen and chlorine co-doped carbon quantum dots (N,Cl-CQDs). D-Glucosamine hydrochloride asExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 25 REFERENCES
Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots.
TLDR
The G QDs are capable of converting blue light into white light when the GQDs are coated onto a blue light emitting diode and the photoluminescence quantum yields were determined to be 7-11%. Expand
Upconversion and downconversion fluorescent graphene quantum dots: ultrasonic preparation and photocatalysis.
TLDR
A facile ultrasonic route for the fabrication of graphene quantum dots (GQDs) with upconverted emission is presented, and it is interesting that the photocatalytic rate of the rutile TiO(2)/GQD complex system is ca. Expand
A Facile Microwave Avenue to Electrochemiluminescent Two-Color Graphene Quantum Dots
With the assistance of microwave irradiation, greenish-yellow luminescent graphene quantum dots (gGQDs) with a quantum yield (QY) up to 11.7% are successfully prepared via cleaving graphene oxideExpand
An efficient and stable fluorescent graphene quantum dot–agar composite as a converting material in white light emitting diodes
Graphene quantum dots (GQDs) have attracted great attention due to their unique optoelectronic properties. There remains a critical challenge to utilize the water-soluble GQDs for deviceExpand
Energy-level structure of nitrogen-doped graphene quantum dots
The doping of carbon-based materials is of great importance due to its ability to modulate their optical, electrical and optoelectronic properties. Nitrogen-doped graphene quantum dots (N-GQDs) haveExpand
Graphene quantum dots derived from carbon fibers.
TLDR
It is reported that during the acid treatment and chemical exfoliation of traditional pitch-based carbon fibers, that are both cheap and commercially available, the stacked graphitic submicrometer domains of the fibers are easily broken down, leading to the creation of GQDs with different size distribution in scalable amounts. Expand
Surface Chemistry Routes to Modulate the Photoluminescence of Graphene Quantum Dots: From Fluorescence Mechanism to Up‐Conversion Bioimaging Applications
The bandgap in graphene-based materials can be tuned from 0 eV to that of benzene by changing size and/or surface chemistry, making it a rising carbonbased fl uorescent material. Here, the surfaceExpand
Luminscent graphene quantum dots for organic photovoltaic devices.
TLDR
It is demonstrated that graphene quantum dots blended with regioregular poly(3-hexylthiophene-2,5-diyl) or poly(2-methoxy-5-(2-ethylhexyloxy)-1,4phenylenevinylene) polymer results in a significant improvement in the OPV characteristics as compared to GSs blended conjugated polymers. Expand
Strongly green-photoluminescent graphene quantum dots for bioimaging applications.
Strongly fluorescent graphene quantum dots (GQDs) have been prepared by one-step solvothermal method with PL quantum yield as high as 11.4%. The GQDs have high stability and can be dissolved in mostExpand
Size-Dependent Structural and Optical Characteristics of Glucose-Derived Graphene Quantum Dots
It is of scientific importance to obtain graphene quantum dots (GQDs) with narrow-size distribution in order to unveil their size-dependent structural and optical properties, thereby further toExpand
...
1
2
3
...