White light emitting diodes with a high colour rendering index of 98.3 using blue emissive carbon dots

Zhou, Lu; Wang, Huiyong; Yu, Hongmei; Amador, Eric; Xue, Jiajia; Wang, Shaoyan; Chen, Wei

doi:10.1039/d3tc02297h

J. Mater. Chem. C

2023

DOI: 10.1039/d3tc02297h

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White light emitting diodes with a high colour rendering index of 98.3 using blue emissive carbon dots

Lu Zhou,

Huiyong Wang,

Hongmei Yu

et al.

Abstract: Fluorescent carbon dots (CDs) have become important materials for white light emitting diodes (WLED) due to their high stability, low cost and environmental friendliness. Here, blue carbon dots (B-CDs) were...

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2024

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Synthesis of Good Solid‐State Emissive Carbon Dots through Microwave‐Assisted Microemulsion Process

Yue,

Zhang,

Liu

et al. 2024

Part & Part Syst Charact

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Environmental‐friendly carbon dots (CDs) have found wide applications in the fields of white light emitting diode (WLED), chemical sensor, wide‐gamut display, etc. However, for the aggregation‐caused quenching (ACQ) effect, high dose of CDs immobilization generally suffers from the great fluorescence quenching, hindering their practical uses in many cases. In the present work, a one‐step microwave‐assisted microemulsion process is developed to prepare matrix‐free green CDs powders with absolute fluorescent quantum yield (QY) up to 48.34%. From dilute solution to matrix‐free powder, the QY of CDs decreases only about 20%, significant smaller than the sample prepared without surfactant (74%). Structural characterization and fluorescent lifetime measurements suggest that the passivation of hydrophobic long‐alkyl chains from surfactant Span‐80 is very key for their good solid‐state photoluminescence (PL). For the good solid‐state PL and various solvent‐compatibility, the CDs reported show promising applications in the fabrication of WLED and the measurement of water content of ethanol/water solution. This work provides a new idea to design and simply synthesize desirable CDs‐based luminescent materials with good solid‐state PL.

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Synthesis of Good Solid‐State Emissive Carbon Dots through Microwave‐Assisted Microemulsion Process

Yue,

Zhang,

Liu

et al. 2024

Part & Part Syst Charact

View full text Add to dashboard Cite

show abstract

Green innovation: cool white light emission from inorganic ZnS nanoparticles with tunable structural and optical properties

Surendran,

Tintu

2024

J Mater Sci: Mater Electron

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White light emitting diodes with a high colour rendering index of 98.3 using blue emissive carbon dots

Abstract: Fluorescent carbon dots (CDs) have become important materials for white light emitting diodes (WLED) due to their high stability, low cost and environmental friendliness. Here, blue carbon dots (B-CDs) were...

Cited by 2 publications

References 50 publications

Synthesis of Good Solid‐State Emissive Carbon Dots through Microwave‐Assisted Microemulsion Process

Synthesis of Good Solid‐State Emissive Carbon Dots through Microwave‐Assisted Microemulsion Process

Green innovation: cool white light emission from inorganic ZnS nanoparticles with tunable structural and optical properties

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