Long-wavelength emissive solid-state carbon dots in nanoporous glass with excellent thermal stability

Ma, Yunxiu; Zhang, Ning; Yang, Lüyun

doi:10.1016/j.jcis.2021.04.060

Cited by 29 publications

(10 citation statements)

References 53 publications

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“…The UV-vis absorption and photoluminescence spectroscopies were performed to study the optical properties of as-synthesized PCNDs-2. As displayed in Figure f, the UV–vis spectrum of PCNDs-2 showed two characteristic absorption bands at ∼230 and 280 nm, which result from the π–π* transition of the aromatic CC sp 2 domains and n –π* transition of surface functional groups (CO, C–N). − It is noteworthy that there are subtle absorptions deconvoluted from the absorption band at 280 nm, which indicates that PCNDs-2 successfully inherit the aromatic structure of their precursors ( l -phenylalanine and l -tryptophan). A detailed investigation of the fluorescence property was then performed.…”

Section: Results and Discussionmentioning

confidence: 95%

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

et al. 2022

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The development of simple and effective dual-mode analytical methods plays crucial regulatory roles in the discrimination of relevant target species, because of their built-in cross reference correction and high accuracy. In this work, a novel polymer carbon nanodots (PCNDs) prepared from a facile one-pot hydrothermal procedure using readily available L-tryptophan and L-phenylalanine as precursors, showed excellent aqueous solubility and blue fluorescence property with a high quantum yield of 29%. Moreover, the PCNDs was demonstrated to be a robust luminophore with electrochemiluminescence (ECL) efficiency of 43% was achieved by using K 2 S 2 O 8 as a coreactant. The spooling ECL spectroscopy was employed to take insight into excited states responsible for the potential-dependent ECL emissions. Most importantly, when introduced into construction of the fluorescence and ECL dual mode sensing platform, for the first time, the PCNDs displayed prominent performance for the detection of ferric ions (Fe 3+ ). The ferric ions could be quantified ranging from micromolar to millimolar with a detection limit of 0.22 and 5.3 μM, respectively. Such a dual-functional sensing platform also exhibits excellent selectivity, reproducibility and stability. Results from this work indicate that PCNDs showing great promise as a bright luminophore for the fabrication of low-cost, high-performance dual-signal readout platforms for ferric ions determination.

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Section: Results and Discussionmentioning

confidence: 95%

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

et al. 2022

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“…An extra steric hindrance is introduced between Si‐CDs particles by co‐assembling with MAs, greatly suppressed FRET attenuation. [ 23 ] This method provides curing conditions and inhibits nonradiative relaxation, the excited electrons can only return to S 0 by radiative transitions, forming a high‐radiation recombination path in the solid state, thereby significantly increasing the PL (Figure 4f). This curing strategy does not involve chemical reactions, the MAs does not affect the electronic energy level distribution of Si‐CDs but only plays a role in space limitation.…”

Section: Resultsmentioning

confidence: 99%

Strategy to Construct High Thermal‐Stability Narrow‐Band Green‐Emitting Si‐CDs@MAs Phosphor for Wide‐Color‐Gamut Backlight Displays

Chen

Zou

et al. 2022

Advanced Optical Materials

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Developing innovative narrow‐band green‐emitting phosphors featuring low thermal quenching and eco‐friendliness for white light‐emitting diode (WLED) backlights is a pivotal challenge. Benefitting from narrowband and low toxicity of green‐emitting silanized carbon dots (Si‐CDs), an efficient confinement and protection strategy through embedding Si‐CDs in mesoporous aluminas (MAs) is proposed to construct MAs and Si‐CDs composites (Si‐CDs@MAs) with superior luminescence properties. Si‐CDs@MAs phosphor exhibits green emission at 526 nm with narrow full width at half maximum of 51 nm, zero‐thermal quenching even up to 423 K (104.1%@423 K of the emission peak intensity at 298 K), and the internal quantum efficiency of 64.46%. Compared with broad‐band yellow‐emitting solid‐state Si‐CDs (S‐Si‐CDs), the thermal stability, photostability, and water stability of Si‐CDs@MAs phosphor are remarkably improved due to surface protection. The WLED backlight is fabricated with optimized Si‐CDs@MAs phosphor, which shows high luminous efficacy of 117.43 lm W−1 and wide color gamut (107% NTSC). Furthermore, this work provides the design principles of realizing stable narrow‐band solid‐state fluorescence carbon dots, suggesting its great potential for wide‐color‐gamut display application.

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“…Luminescent carbon dots (CDots) have drawn great attention in photonics and optoelectronic applications due to their attractive optical properties, environmentally friendly features, and various preparation methods. [1][2][3][4][5] For use in photonics and optoelectronics, the availability of solid-state composites based on luminescent CDots is in high demand. However, the photoluminescence (PL) properties of solid-state CDots suffer significant decline and even complete quenching.…”

Section: Introductionmentioning

confidence: 99%

Growth of carbon dots in nanoporous silica glasses for highly enhanced dual-wavelength emission

Liu

et al. 2023

Phys. Chem. Chem. Phys.

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Long-wavelength emissive solid-state carbon dots in nanoporous glass with excellent thermal stability

Cited by 29 publications

References 53 publications

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Strategy to Construct High Thermal‐Stability Narrow‐Band Green‐Emitting Si‐CDs@MAs Phosphor for Wide‐Color‐Gamut Backlight Displays

Growth of carbon dots in nanoporous silica glasses for highly enhanced dual-wavelength emission

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