Synthesis and modulation of multicolor fluorescent carbon dots from p-phenylenediamine and dansyl derivative for white light emitting diodes
| Autor: | Cintya D' Angeles do Espirito Santo Barbosa, Dimas J. P. Lima, L.B.O. Davi |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Organic Chemistry Heteroatom Dansyl chloride p-Phenylenediamine chemistry.chemical_element Quantum yield Photochemistry Fluorescence Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound chemistry Molecule Electrical and Electronic Engineering Physical and Theoretical Chemistry Carbon Spectroscopy Diode |
| Zdroj: | Optical Materials. 121:111502 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2021.111502 |
| Popis: | Carbon dots (C-dots) with multicolor emission are promising in the development of white light emitting diode (WLED) devices with high efficiency and low cost. In this study, we synthesized C-dots with tricolor emissions of blue (C-DsCl), green (C-pPDDS) and red (C-pPD) via the hydrothermal method using dansyl chloride, p-phenyldiaminadansyl and p-phenylenediamine as precursors, respectively. The fluorescent properties of the synthesized C-dots were found to be dependent on the presence of heteroatoms obtained via modulation of the p-phenylenediamine and dansyl chloride molecules, leading to an increased quantum yield for the N and S co-doped C-dots. The C-dots/PVP film displayed good CRI up to 89, CCT of 5628 K and color coordinates of (0.33, 0.31), close to that of pure white-light emission (0.33, 0.33). So, the C-dots with multicolor emission produced in this study can be used as a color converter to produce high-quality WLEDs. |
| Databáze: | OpenAIRE |
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