Highly optically and thermally stable carbon dots enabled by thermal annealing for laser illumination

Liu, Xinghua; Yan, Lingpeng; Zheng, Jingxia; Yang, Yongzhen; Liu, Xuguang; Xu, Bingshe

doi:10.1039/d2tc05359d

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…The hydrolysis and condensation the silane precursors, catalyzed by acid or base solutions, leads to hydrolyzed silica substrates that encapsulate the CDs by physical dispersion to form CD composites with SSF. The physically dispersed silica substrates usually include tetraethyl orthosilicate (TEOS), [35][36][37] (3-aminopropyl)triethoxysilane (APTES), [38,39] methyltriethoxysilane (MTES), [39][40][41] tetramethyl orthosilicate (TMOS), [42] N- [3-(trimethoxysilyl)propyl]ethylenediamine (DAMO), [43] N-𝛽-(aminoethyl)-𝛾-aminopropyltrimethoxysilane (KH-792), [44,45] and silica sols. [46,47] For example, Liu et al [44] proposed an effective technique to form SSF film using KH-792 as the dispersing agent and silanol as a film forming agent: CDs/silica was formed by injecting KH-792 directly into an aqueous solution of CDs.…”

Section: Silicon-matrix-assisted Fabrication Of Carbon Dots For Solid...mentioning

confidence: 99%

Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

Wang

Song

et al. 2023

Adv Funct Materials

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Carbon dots (CDs)—carbon nanoparticles smaller than 10 nm—have attracted widespread attention owing to their excellent optical properties. However, high‐performing CDs often suffer from severe aggregation‐induced quenching in the solid state, which limits their commercial applicability. Therefore, CD materials with efficient solid‐state luminescence are sought. As research on the structure and photoluminescence mechanisms of CDs has intensified in recent years, strategies to construct fluorescent solid‐state CD materials and tune their emissions have broadened. This article reviews recent advances in the strategies and mechanisms for attaining solid‐state fluorescence in CDs, describes specific ways to tune the optical properties of this fluorescence, introduces the latest applications of the resulting CDs to optoelectronics, biology, and sensing, and finally considers the prospects for future application and current challenges facing the development of solid‐state fluorescence in CDs.

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Section: Silicon-matrix-assisted Fabrication Of Carbon Dots For Solid...mentioning

confidence: 99%

Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

Wang

Song

et al. 2023

Adv Funct Materials

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“…9 With the development of UV blocking materials, carbon nanodots (CNDs) have gradually been used to block high-energy short wavelength light due to their excellent optical absorption and conversion properties. 1,2,10,11 CNDs are a new type of carbon nanomaterial with a particle size <10 nm, excellent resistance to photobleaching and good responsiveness to changes in pH and temperature, [12][13][14][15][16] which are widely used in white light emitting diodes (WLEDs), [17][18][19][20] in anticounterfeiting applications, 21,22 as probes, [23][24][25] and catalysts, 26,27 and for biological imaging. 28,29 Among the many possible sources of carbon for preparing carbon dots, natural resources and derivatives are particularly attractive because of their abundance, low price, environmental friendliness and sustainability.…”

Section: Introductionmentioning

confidence: 99%

Construction of composite films using carbon nanodots for blocking ultraviolet light from the Sun

Bai

Zhao

et al. 2023

RSC Adv.

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A Remarkable Color Rendering Index of 87 in White Laser Lighting Diode Enabled by Amide‐Functionalized Carbon Dots Phosphor with High Photothermal Stability

Liu,

Zheng,

Wei

et al. 2024

Advanced Optical Materials

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Carbon dots (CDs) phosphors in white laser diodes (WLD) have the advantages of sufficient surface functionalization sites and low cost. Specially, their color rendering index (CRI) in WLD is unsatisfactory due to the uncontrollable synthesis process and low thermal stability. Herein, surface nitrogen‐containing groups of CDs are synthesized from phenylenediamine isomers and trimeric acid, and the optical and thermal properties of CDs are modulated by introducing amide bonds (–CONH). By varying the phenylenediamine isomers, CDs synthesized from o‐phenylenediamine, m‐phenylenediamine, and p‐phenylenediamine emit different fluorescence peaks at 534, 498, and 434 nm, respectively. Further investigation shows that the increase of –CONH and adjacent –NH2 favors the reduction of bandgap, which in turn induces redshifted emission. The green‐emitting CDs are also found to be thermally stable at high –CONH contents up to 10.35%. Finally, by assembling the fluorescent film with 450 nm laser diode, WLD with color coordinates of (0.3767, 0.3540), correlated color temperature of 3924 K, and CRI of 87 is realized, and its CRI reaches the advancing value for single phosphors‐based WLD devices. This work will lay the theoretical and experimental foundation for the realization of the low‐cost, high photothermal stability, high‐color‐rendering‐index CDs‐based laser lighting devices.

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Highly optically and thermally stable carbon dots enabled by thermal annealing for laser illumination

Abstract: In order to obtain the carbon dots (CDs) fluorescent materials with good optical and thermal properties for laser illumination, CDs with excellent fluorescence properties were synthesized by hydrothermal method using...

Cited by 7 publications

References 53 publications

Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

Construction of composite films using carbon nanodots for blocking ultraviolet light from the Sun

A Remarkable Color Rendering Index of 87 in White Laser Lighting Diode Enabled by Amide‐Functionalized Carbon Dots Phosphor with High Photothermal Stability

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