Abstract
As an important complement to traditional quantum dots (QDs), carbon quantum dots (CQDs) possess the characteristics of low toxicity, easy preparation, low cost, and good biocompatibility. Here, we have successfully prepared blue, yellow-green, yellow and red emitting CQDs by a one-step solvothermal method using o-phenylenediamine as a precursor and only water and ethanol as solvents. It is noted that the diameter of CQDs satisfies the quantum size effect, which is also corroborated by the reduced graphitization. The decay processes of CQDs obey double exponential fit. The x-ray photoelectron spectroscopy (XPS) conclusively determines that the red-shift from yellow-green to red CQDs is associated with the carbon-/oxygen-related surface defects except for the quantum size effect. Intriguingly, multi-color CQDs-based LEDs devices using thermoset epoxy resins have been successfully fabricated, which illustrates the great potential of CQDs for future applications in the luminescence field due to their superior performance and environmentally friendly fabrication.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
