Color Emission Carbon Dots with Quench-ResixAstant Solid-State Fluorescence for Light-Emitting Diodes DOI
Fan-Yong Yan, Hao Zhang, Jinxia Xu

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2021, Volume and Issue: 9(10), P. 3901 - 3908

Published: March 4, 2021

Since carbon dots (CDs) were reported in 2004, they have been widely used various fields due to their outstanding optical properties. However, most CDs are self-quenched the direct π–π interaction solid-state aggregation. This shortcoming limits wide application of CDs, because numerous optoelectronic devices and sensors usually require photoluminescent materials solid state. Therefore, designing preparing with multicolor emission is necessary. Here, fluorescence (SSF) prepared via a one-step solvothermal method, using MA APTES as raw materials. Through adjusting ratio materials, emitting green, yellow, orange colors obtained. The spectrum ranges from 490–625 nm, QYs 34.06%, 38.07%, 20.37%, respectively. For main reason for that Si–O, Si–C, Si–N bonds generated during formation process can prevent between graphitized cores. red shift mechanism liquid attributed decrease particle size increase degree aggregation within unit range. In addition, based on these excellent photoluminescence properties, we colored light-emitting diodes—the CIEs (0.22, 0.41), (0.38, 0.47), (0.50, 0.43) (Commission Internationale de l'Elcairage coordinate)—and CDs/epoxy films high transparency stability.

Language: Английский

Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications DOI Creative Commons
Junjun Liu, Rui Li, Bai Yang

et al.

ACS Central Science, Journal Year: 2020, Volume and Issue: 6(12), P. 2179 - 2195

Published: Dec. 14, 2020

Carbon dots (CDs), as a new type of carbon-based nanomaterial, have attracted broad research interest for years, because 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, electron mobility. In this Outlook, we comprehensively summarize the classification CDs based on analysis formation mechanism, micro-/nanostructure property features, describe synthetic methods including strong absorption, photoluminescence, phosphorescence. Furthermore, recent significant advances in applications, (sensor, anticounterfeiting), energy (light-emitting diodes, catalysis, photovoltaics, supercapacitors), promising biomedicine, are systematically highlighted. Finally, envisage key issues to be challenged, future directions, perspectives show full picture CDs-based materials.

Language: Английский

Citations

1355
Surface states of carbon dots and their influences on luminescence DOI Open Access
Hui Ding, Xuehua Li, Xiaobo Chen

et al.

Journal of Applied Physics, Journal Year: 2020, Volume and Issue: 127(23)

Published: June 17, 2020

Luminescent carbon dots (CDs) have received increasing attention from many fields during the past decade. Unfortunately, luminescent mechanisms of CDs remain unclear due to insufficient experimental and theoretical knowledge, which significantly hinders development with desired optical properties. Currently, surface states CDs, are based on synergistic hybridization between backbones connected functional groups, been considered as dominant luminescence origins. This tutorial paper, thus, aims offer an overview key features such particle size, defects heteroatom doping, their influences photoluminescence CDs. In addition, characteristics state-derived emissions also summarized. Finally, potential approaches characterizing introduced, followed by outlook synthesizing high-quality through modulation states.

Language: Английский

Citations

263
Carbon dots with red/near-infrared emissions and their intrinsic merits for biomedical applications DOI
Hui Ding,

Xuanxuan Zhou,

Jishi Wei

et al.

Carbon, Journal Year: 2020, Volume and Issue: 167, P. 322 - 344

Published: June 12, 2020

Language: Английский

Citations

211
Construction of Carbon Dots with Color‐Tunable Aggregation‐Induced Emission by Nitrogen‐Induced Intramolecular Charge Transfer DOI

Xiaokai Xu,

Luoqi Mo,

Yadong Li

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(49)

Published: Oct. 13, 2021

As one of the most promising fluorescent nanomaterials, fluorescence carbon dots (CDs) in solution is extensively studied. Nevertheless, synthesis multicolor solid-state (SSF) CDs rarely reported. Herein, with aggregation-induced emission are prepared using amine molecules, all them exhibiting dual at 480 nm (Em-1) and 580-620 (Em-2), which related to SS bonds dithiosalicylic acid conjugated structure attached CO/CN bonds, respectively. a strong electron-withdrawing group, increase CN content makes dual-fluorescent groups on surface produce push pull electrons, determines intramolecular charge transfer (ICT) between double emission. With from 35.6% 58.4%, ICT efficiency increases 8.71% 45.94%, changing green red. The causes quantum yield enhancement by nearly five times redshift peak. Finally, based luminescence properties induced aggregation CDs, pattern encryption white-LED devices realized. Based fat solubility ultraviolet absorption characteristics fingerprint detection leaf anti-UV hazards applied.

Language: Английский

Citations

203
The Emerging Development of Multicolor Carbon Dots DOI
Jiurong Li, Xiao Gong

Small, Journal Year: 2022, Volume and Issue: 18(51)

Published: Nov. 3, 2022

Abstract As a relatively new type of fluorescent carbon‐based nanomaterials, multicolor carbon dots (MCDs) have attracted much attention because their excellent biocompatibility, tunable photoluminescence (PL), high quantum yield, and unique electronic physicochemical properties. The emission characteristics (CDs) obviously depend on the source precursor, reaction conditions, environment, which directly or indirectly determines CDs. Therefore, this review is first systematic classification summary multiple regulation methods synthetic MCDs reviews recent research progress in synthesis from variety precursor materials such as aromatic molecules, small organic natural biomass, focusing how different produce corresponding MCDs. This also introduces innovative applications fields biological imaging, light‐emitting diodes (LEDs), sensing, anti‐counterfeiting due to PL It hoped that by selecting appropriate adjustment methods, can inspire guide future design tailored MCDs, provide help for development multifunctional

Language: Английский

Citations

165
Tunable fluorescent carbon dots from biowaste as fluorescence ink and imaging human normal and cancer cells DOI
Raji Atchudan, Somasundaram Chandra Kishore, Prakash Gangadaran

et al.

Environmental Research, Journal Year: 2021, Volume and Issue: 204, P. 112365 - 112365

Published: Nov. 9, 2021

Language: Английский

Citations

153
Ethanol-derived white emissive carbon dots: the formation process investigation and multi-color/white LEDs preparation DOI
Boyang Wang, Haoqiang Song, Zhiyong Tang

et al.

Nano Research, Journal Year: 2021, Volume and Issue: 15(2), P. 942 - 949

Published: June 16, 2021

Language: Английский

Citations

145
Large scale synthesis of full-color emissive carbon dots from a single carbon source by a solvent-free method DOI
Hui Ding,

Xuanxuan Zhou,

Zi‐Hui Zhang

et al.

Nano Research, Journal Year: 2021, Volume and Issue: 15(4), P. 3548 - 3555

Published: Oct. 15, 2021

Language: Английский

Citations

110
Light of carbon: Recent advancements of carbon dots for LEDs DOI
Chunyu Ji, Wenjun Xu,

Qiurui Han

et al.

Nano Energy, Journal Year: 2023, Volume and Issue: 114, P. 108623 - 108623

Published: June 20, 2023

Language: Английский

Citations

109
Ionic Liquid‐Assisted Fast Synthesis of Carbon Dots with Strong Fluorescence and Their Tunable Multicolor Emission DOI

Mengyan Cao,

Xiujian Zhao, Xiao Gong

et al.

Small, Journal Year: 2022, Volume and Issue: 18(11)

Published: Jan. 17, 2022

Abstract Conventional synthesis of carbon dots (CDs) mostly involves a hydrothermal or solvent‐thermal reaction which needs relatively high temperature and pressure. In this work, ionic liquid is used to assist in fast synthesizing CDs with an ultrahigh photoluminescent quantum yield (98.5%) by heating at low (≤100 °C) atmospheric addition, through approach, tunable multicolor emissive can be successfully achieved for preparing high‐performance white light‐emitting diodes. Theoretical computation proves that the activity significantly enhanced liquids. Density functional theory calculation reveals size graphite nitrogen ratios have effect on bandgap reduction, resulting redshift emission, good agreement experimental results. This simple promising approach using affords facilitation CDs‐based luminescent materials manufacturing devices.

Language: Английский

Citations

107