One-Pot Synthesis of Dual Color-Emitting CDs: Numerical and Experimental Optimization towards White LEDs

Minervini, Gianluca; Madonia, Antonino; Panniello, Annamaria; Fanizza, Elisabetta; Curri, Maria Lucia; Striccoli, Marinella

doi:10.3390/nano13030374

Cited by 4 publications

(2 citation statements)

References 89 publications

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“…Preparation of Fluorescent Nanocomposites. Polymeric nanocomposite coatings based on NR-CDs were prepared employing previously reported procedures 29,76,77 with minor variations. In detail, purified NR-CDs were dispersed in a HCl 10 −3 M aqueous solution under vigorous stirring; subsequently PVA (0.4 g/mL) was added to the above solution, and the system was kept under magnetic stirring until an optically clear dispersion was obtained.…”

Section: Chemicalsmentioning

confidence: 99%

Dye-Derived Red-Emitting Carbon Dots for Lasing and Solid-State Lighting

Madonia,

Minervini,

Terracina

et al. 2023

ACS Nano

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Carbon dots are carbon-based nanoparticles renowned for their intense light-emitting capabilities covering the whole visible light range. Achieving carbon dots emitting in the red region with high efficiency is extremely relevant due to their huge potential in biological applications and in optoelectronics. Currently, photoluminescence in such an energy interval is often associated with polyheterocyclic molecular domains forming during the synthesis that, however, present low emission efficiency and issues in controlling the optical features. Here, we overcome these problems by solvothermally synthesizing carbon dots starting from Neutral Red, a common red-emitting dye, as a molecular precursor. As a result of the synthesis, such molecular fluorophore is incorporated into a carbonaceous core while retaining its original optical properties. The obtained nanoparticles are highly luminescent in the red region, with a quantum yield comparable to that of the starting dye. Most importantly, the nanoparticle carbogenic matrix protects the Neutral Red molecules from photobleaching under ultraviolet excitation while preventing aggregation-induced quenching, thus allowing solid-state emission. These advantages have been exploited to develop a fluorescence-based color conversion layer by fabricating polymer-based highly concentrated solid-state carbon dot nanocomposites. Finally, the dye-based carbon dots demonstrate both stable Fabry–Perot lasing and efficient random lasing emission in the red region.

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Section: Chemicalsmentioning

confidence: 99%

Dye-Derived Red-Emitting Carbon Dots for Lasing and Solid-State Lighting

Madonia,

Minervini,

Terracina

et al. 2023

ACS Nano

Self Cite

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“…The dual-emission CD strategy was based on the direct dual emission from CDs without further addition of luminescent materials [36][37][38]. Therefore, this strategy provides a simple and accurate approach to establishing ratiometric probes which call for the direct synthesis of dualemission carbon dots (DE-CDs) and establishing an effective ratiometric sensor [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

A Review of Dual-Emission Carbon Dots and Their Applications

Ma,

Sun,

Gao

et al. 2023

Molecules

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Carbon dots (CDs), as a rising star among fluorescent nanomaterials with excellent optical properties and fascinating dual-emission characteristics, have attracted increasing attention in sensing, bio-imaging, drug delivery, and so on. The synthesis of dual-emission CDs (DE-CDs) and the establishment of ratiometric fluorescence sensors can effectively diminish background interference and provide more accurate results than single-emission CDs. Although DE-CDs have generated increased attention in many fields, the review articles about DE-CDs are still insufficient. Therefore, we summarized the latest results and prepared this review. This review first provides an overview of the primary synthesis route and commonly used precursors in DE-CDs synthesis. Then, the photoluminescence mechanism behind the dual-emission phenomenon was discussed. Thirdly, the application of DE-CDs in metal cation detection, food safety analysis, biosensing, cell imaging, and optoelectronic devices has been extensively discussed. Finally, the main challenges and prospects for further development are presented. This review presents the latest research progress of DE-CDs synthesis and its application in ratiometric sensing; hopefully, it can help and encourage researchers to overcome existing challenges and broaden the area of DE-CDs research.

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Blue‐Emitting Boron‐ and Nitrogen‐Doped Carbon Dots for White Light‐Emitting Electrochemical Cells

Cavinato,

Kost,

Campos‐Jara

et al. 2024

Advanced Optical Materials

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This work describes the first use of blue‐emitting boron‐ and nitrogen‐doped carbon dots (BN‐CDs), rationalizing their photoluminescence behavior in solution and ion‐based thin‐films to prepare white light‐emitting electrochemical cells (LECs). In detail, a cost‐effective and scalable water‐based microwave‐assisted synthesis procedure is set for BN‐CDs featuring an amorphous carbon‐core doped with N and B. While they show a bright (photoluminescence quantum yield of 42%) and excitation‐independent blue‐emission (440 nm) in solution related to emitting n−π* surface states, they are not emissive in thin‐films due to aggregation‐induced quenching. Upon fine‐tuning the film composition (ion‐based host), an excitation dependent emission covering the whole visible range is noted caused by interaction of the ion electrolyte with the peripheral functionalization of the BN‐CDs. Moreover, the efficient energy transfer from the host to the BN‐CDs emitting species enabled good performing LECs with white emission (x/y CIE coordinates of 0.30/0.35, correlated color temperature of 6795 K, color rendering index of 87) and maximum luminance of 40 cd m−2, and stabilities of a few hours. This represents a significant improvement compared to the prior‐art monochromatic CD‐based LECs with similar brightness levels, but stabilities of <1 min.

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One-Pot Synthesis of Dual Color-Emitting CDs: Numerical and Experimental Optimization towards White LEDs

Cited by 4 publications

References 89 publications

Dye-Derived Red-Emitting Carbon Dots for Lasing and Solid-State Lighting

Dye-Derived Red-Emitting Carbon Dots for Lasing and Solid-State Lighting

A Review of Dual-Emission Carbon Dots and Their Applications

Blue‐Emitting Boron‐ and Nitrogen‐Doped Carbon Dots for White Light‐Emitting Electrochemical Cells

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