Journal ArticleDOI
Gram-Scale Synthesis of Highly Efficient Rare-Earth-Element-Free Red/Green/Blue Solid-State Bandgap Fluorescent Carbon Quantum Rings for White Light-Emitting Diodes
TLDR
The results show the role of cyano groups in the curvature of carbon quantum ribbons for CQR formation and emission of stable solid-state bandgap fluorescence and facilitates the development of high-performance low-cost REE-free phosphors.Abstract:
The negative impact of rare-earth elements (REEs) on the environment, limited supply and high cost prompt the need for REE-free phosphor-converted white light-emitting diodes (LEDs). Here, we report the gram-scale synthesis of red/green/blue solid-state bandgap fluorescent carbon quantum rings (R/G/B-SBF-CQRs) with high quantum yields up to 30-46 %. This was achieved using cyano-group-bearing p-phenyldiacetonitrile as precursor and forming carbon quantum rings of different diameters through the linkage of curved carbon quantum ribbons of different lengths. The results show the role of cyano groups in inducing the curvature of the carbon quantum ribbons for CQR formation and emission of stable solid-state bandgap fluorescence. R/G/B-SBF-CQRs-phosphor-based LEDs emitted warm white light with low CCT (3576 K), high CRI (96.6), and high luminous efficiency (48.7 lm W-1 ), comparable to REE-phosphor-based LEDs.read more
Citations
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Journal ArticleDOI
Carbon Dots in Bioimaging, Biosensing and Therapeutics: A Comprehensive Review
TL;DR: Carbon dots (CDs) are currently attracting a lot of interest in biological fields owing to their fluorescent properties, high photostability, biocompatibility and low toxicity as discussed by the authors .
Journal ArticleDOI
High‐Yield Carbon Dots Interlayer for Ultra‐Stable Zinc Batteries
Hao Zhang,Shuo Li,Laiqiang Xu,Roya Momen,Wen Deng,Jiugang Hu,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji +8 more
TL;DR: In this article , high yield carbon dots (CDs) with abundant polar functional groups (CHO and CN), as a functional artificial interface layer, are rationally designed to optimize electrolyte/Zn interfaces with large-scale viability.
Journal ArticleDOI
Carboxylated carbon quantum dot-induced binary metal–organic framework nanosheet synthesis to boost the electrocatalytic performance
Da Yi Song,Huazhang Guo,Kai-Ling Huang,Huiyi Zhang,Jia Hong Chen,Liang Wang,Cheng Lian,Yong Wang +7 more
TL;DR: In this article , a bottom-up synthesis of 2D metal-organic framework nanosheets (MOF NSs) induced by carboxylated carbon quantum dots (CQDs-COOH) in-situ through a one-step room-temperature synthesis strategy without additional complex and low-yield exfoliation processes is presented.
Journal ArticleDOI
Aggregation and luminescence in carbonized polymer dots
TL;DR: In this article , the authors discuss the luminescence mechanism of organic luminescent materials with emphasis on their aggregation behavior, including the role of cross-linked polymer networks and chromophores present in CPDs.
References
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Journal ArticleDOI
Solid-State Light Sources Getting Smart
E. Fred Schubert,Jong Kyu Kim +1 more
TL;DR: The high efficiency of solid-state sources already provides energy savings and environmental benefits in a number of applications, but these sources also offer controllability of their spectral power distribution, spatial distribution, color temperature, temporal modulation, and polarization properties.
Journal ArticleDOI
Highly Photoluminescent Carbon Dots for Multicolor Patterning, Sensors, and Bioimaging
Shoujun Zhu,Qingnan Meng,Lei Wang,Junhu Zhang,Yubin Song,Han Jin,Kai Zhang,Hongchen Sun,Hai-Yu Wang,Bai Yang +9 more
TL;DR: A facile and highoutput strategy for the fabrication of CDs, which is suitable for industrial-scale production and is almost equal to fluorescent dyes, is discussed.
Journal ArticleDOI
Full-Color Light-Emitting Carbon Dots with a Surface-State-Controlled Luminescence Mechanism.
TL;DR: Carbon dots with tunable photoluminescence (PL) and a quantum yield of up to 35% in water were hydrothermally synthesized in one pot and separated via silica column chromatography, and these separated CDs emitted bright and stable luminescence in gradient colors under a single-wavelength UV light.
Journal ArticleDOI
Red, Green, and Blue Luminescence by Carbon Dots: Full‐Color Emission Tuning and Multicolor Cellular Imaging
TL;DR: The facile preparation and unique optical features make these CDs potentially useful in numerous applications such as light-emitting diodes, full-color displays, and multiplexed (UC)PL bioimaging.
Journal ArticleDOI
A Biocompatible Fluorescent Ink Based on Water-Soluble Luminescent Carbon Nanodots
TL;DR: Carbon nanodots (C-dots) are fascinating carbon material that are attracting increasing interest because they possess distinct benefits, such as chemical inertness, a lack of opticalblinking, low photobleaching, low cytotoxicity, and excellent biocompatibility.