Afterglow of carbon dots: mechanism, strategy and applications

Jiang, Kai; Wang, Yuhui; Li, Zhongjun; Lin, Hengwei

doi:10.1039/c9qm00578a

Cited by 155 publications

(152 citation statements)

References 145 publications

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“… 3 , 24 , 25 , 27 To date, great progress has been made in preparing RTP CDs: from embedding CDs in various matrices to matrix-free CDs as well as expanding applications in multimodal anticounterfeiting and bioimaging. 3 , 24 , 25 , 27 , 42 , 64 , 65 However, synthesis and applications of CDs-based RTP materials are still at an early stage; their QY, lifetime, and stability should be further improved by designing appropriate structures, post-treatment, or adjusting reaction conditions.…”

Section: Optical Propertiesmentioning

confidence: 99%

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

2020

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Carbon dots (CDs), as a new type of carbon-based nanomaterial, have attracted broad research interest for years, because of their diverse physicochemical properties and favorable attributes like good biocompatibility, unique optical properties, low cost, ecofriendliness, abundant functional groups (e.g., amino, hydroxyl, carboxyl), high stability, and electron mobility. In this Outlook, we comprehensively summarize the classification of CDs based on the analysis of their formation mechanism, micro-/nanostructure and property features, and describe their synthetic methods and optical properties including strong absorption, photoluminescence, and phosphorescence. Furthermore, the recent significant advances in diverse applications, including optical (sensor, anticounterfeiting), energy (light-emitting diodes, catalysis, photovoltaics, supercapacitors), and promising biomedicine, are systematically highlighted. Finally, we envisage the key issues to be challenged, future research directions, and perspectives to show a full picture of CDs-based materials.

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Section: Optical Propertiesmentioning

confidence: 99%

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

2020

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“…To date, many studies on solid‐state PL of CQD have been conducted, among which many potential mechanism models of solid‐state PL of CQDs, including SSF, [ 21 ] phosphorescence, [ 81 ] and DF, [ 82 ] have been proposed. [ 83 ] To derive a better understanding of solid‐state CQDs‐based luminescent materials, it is important to gain a certain familiarity with the achievements made in the field to date. In this section, we first provide a brief introduction to the classification of solid‐state CQDs‐based photoluminescent materials and the important mechanisms that play a role in their behavior.…”

Section: Pl Mechanisms In Solid‐state Cqdsmentioning

confidence: 99%

“…From an electronic transition (energy level and electronic population) perspective, the PL from solid‐state CQDs can be divided into three main categories: SSF, phosphorescence, and DF. As shown in Figure , [ 83 ] after absorbing light energy, the electron transitions from the ground state to the first excited singlet state or the second excited singlet state. Since the first/second excited singlet state is unstable, the energy is released in the form of light when the electron returns to the ground state, thereby forming SSF.…”

Section: Pl Mechanisms In Solid‐state Cqdsmentioning

confidence: 99%

Carbon‐Based Quantum Dots with Solid‐State Photoluminescent: Mechanism, Implementation, and Application

Wang

et al. 2020

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171

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Carbon‐based quantum dots (CQDs), including spherical carbon dots and graphene quantum dots, are an emerging class of photoluminescent (PL) materials with unique properties. Great progress has been made in the design and fabrication of high‐performance CQDs, however, the challenge of developing solid‐state PL CQDs have aroused great interest among researchers. A clear PL mechanism is the basis for the development of high‐performance solid‐state CQDs for light emission and is also a prerequisite for the realization of multiple practical applications. However, the extremely complex structure of a CQD greatly limits the understanding of the solid‐state PL mechanism of CQDs. So far, a variety of models have been proposed to explain the PL of solid‐state CQDs, but they have not been unified. This review summarizes the current understanding of the solid‐state PL of solid‐state CQDs from the perspective of energy band theory and electronic transitions. In addition, the common strategies for realizing solid‐state PL in CQDs are also summarized. Furthermore, the applications of CQDs in the fields of light‐emitting devices, anti‐counterfeiting, fingerprint detection, etc., are proposed. Finally, a brief outlook is given, highlighting current problems, and directions for development of solid‐state PL of CQDs.

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“…The I P /I F for 2 b was considerably larger than that for 2 a, which is reasonable considering the difference in [c] NA [c] 2. 8 the heavy-atom effect between bromine and iodine. [18] As the luminescence spectrum of non-halogenated derivative 2 c was monomodal with intense blue fluorescence, the presence of a bromine or iodine atom on the naphthyl group is essential for attaining bimodal dual emission, as in the case of 1.…”

Section: Difluoroboron Diaroylmethanesmentioning

confidence: 99%

Metal‐Free Organic Luminophores that Exhibit Dual Fluorescence and Phosphorescence Emission at Room Temperature

Shimizu

Sakurai

2021

ChemPlusChem

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materials that exhibit dual fluorescence and phosphorescence emission in the solid state at room temperature to produce bimodal steady-state emission spectra. The dual emitters presented herein are categorized into the following six compound classes: (1) difluoroboron diaroylmethanes, (2) diarylketones, (3) diarylsulfones, (4) triazines and pyrimidines, (5) fused phenazines, and (6) N-arylcarbazoles.

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Afterglow of carbon dots: mechanism, strategy and applications

Abstract: Recent representative advances in the long-lived afterglow properties and applications of carbon dots are summarized and discussed.

Cited by 155 publications

References 145 publications

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications

Carbon‐Based Quantum Dots with Solid‐State Photoluminescent: Mechanism, Implementation, and Application

Metal‐Free Organic Luminophores that Exhibit Dual Fluorescence and Phosphorescence Emission at Room Temperature

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