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Related Experiment Video

Updated: Feb 10, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

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Published on: November 15, 2016

Tricolor White-Light-Emitting Carbon Dots with Multiple-Cores@Shell Structure for WLED Application.

Tianyi Zhang¹, Feifei Zhao¹, Li Li¹

¹College of Chemistry , Northeast Normal University , Changchun 130024 , P. R. China.

ACS Applied Materials & Interfaces

|May 25, 2018

Summary

Novel nitrogen-doped carbon dots (AC-CDs) exhibit multicolor and white-light emission. These advanced carbon dots show potential for applications in white-light-emitting diodes due to their stability and tunable properties.

Keywords:

carbon dots high quantum yields multiple-core@shell structure pure white-light emission tricolor emission

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Published on: May 31, 2018

Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Carbon dots (CDs) are rapidly developing nanomaterials with excellent optical properties and diverse applications.
Achieving long-wavelength multicolor emission from CDs remains a significant challenge for practical applications.
Nitrogen-doped CDs offer unique photoluminescent properties and enhanced functionality.

Purpose of the Study:

To construct novel nitrogen-doped multiple-core@shell-structured carbon dots (AC-CDs) with tricolor emissions (red, green, blue).
To explore the origin of different fluorescence emissions based on the coordination ability of surface groups.
To investigate the concentration dependence of fluorescent properties and achieve white-light emission.

Main Methods:

One-pot hydrothermal synthesis using 5-amino-1,10-phenanthroline and citric acid as reactants.
Monitoring the growth process of AC-CDs by varying reaction time.
Characterization of fluorescence emission properties, including quantum yield (QY) and Commission Internationale de l'Elcairage (CIE) coordinates.

Main Results:

Successfully synthesized nitrogen-doped multiple-core@shell-structured AC-CDs exhibiting red, green, and blue emissions.
Achieved a high red emission quantum yield of 67% at 630 nm by adjusting AC-CD concentration.
Generated pure white-light emission (CIE: 0.33, 0.33) from single AC-CDs with a QY of 29% through excitation and concentration regulation.

Conclusions:

The surface groups' coordination ability is crucial for the multicolor emission of AC-CDs.
AC-CDs demonstrate concentration-dependent fluorescence properties and tunable emission colors.
White-emitting AC-CDs show promise as phosphors for fabricating stable and efficient white-light-emitting diodes.