Full-color fluorescent carbon quantum dots
Liang Wang,Liang Wang,Weitao Li,Luqiao Yin,Yijian Liu,Huazhang Guo,Jiawei Lai,Yu Han,Gao Li,Ming Li,Jianhua Zhang,Robert Vajtai,Pulickel M. Ajayan,Minghong Wu +13 more
TLDR
The universal electron-donating/withdrawing group engineering approach for synthesizing tunable emissive CQDs will facilitate the progress of carbon-based luminescent materials for manufacturing forward-looking films and devices.Abstract:
Quantum dots have innate advantages as the key component of optoelectronic devices. For white light-emitting diodes (WLEDs), the modulation of the spectrum and color of the device often involves various quantum dots of different emission wavelengths. Here, we fabricate a series of carbon quantum dots (CQDs) through a scalable acid reagent engineering strategy. The growing electron-withdrawing groups on the surface of CQDs that originated from acid reagents boost their photoluminescence wavelength red shift and raise their particle sizes, elucidating the quantum size effect. These CQDs emit bright and remarkably stable full-color fluorescence ranging from blue to red light and even white light. Full-color emissive polymer films and all types of high-color rendering index WLEDs are synthesized by mixing multiple kinds of CQDs in appropriate ratios. The universal electron-donating/withdrawing group engineering approach for synthesizing tunable emissive CQDs will facilitate the progress of carbon-based luminescent materials for manufacturing forward-looking films and devices.read more
Citations
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A multifunctional chemical toolbox to engineer carbon dots for biomedical and energy applications
TL;DR: In this article , a review of pre-and post-synthetic approaches for the preparation of carbon dots and their derivatives or composites is presented, and examples to correlate structure, composition and function are used to discuss future development of this class of nanomaterials.
Journal ArticleDOI
Time-Dependent Phosphorescence Colors from Carbon Dots for Advanced Dynamic Information Encryption.
Jing Tan,Qijun Li,Qijun Li,Shuai Meng,Yuchen Li,Jian Yang,Yunxia Ye,Zikang Tang,Songnan Qu,Ren Xudong +9 more
TL;DR: In this paper, a multilevel, dynamic phosphorescence colored 3D code is designed for advanced dynamic information encryption based on the unusual phosphorescent properties of the carbon dots (CDs) synthesized by the one-pot hydrothermal treatment of levofloxacin.
Journal ArticleDOI
Rational Design of Multicolor-Emitting Chiral Carbonized Polymer Dots for Full-Color and White Circularly Polarized Luminescence
TL;DR: In this article, the synthesis of red and multicolor-emitting chiral carbonized polymer dots (Ch-CPDs) using the common precursors L-/D-tryptophan and o-phenylenediamine, and a solvothermal approach at one temperature was reported.
Journal ArticleDOI
The development of carbon dots: From the perspective of materials chemistry
Shuo Li,Lin Li,Hanyu Tu,Hao Zhang,Debbie S. Silvester,Craig E. Banks,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji,Xiaobo Ji +9 more
TL;DR: In this article, the advance of materials chemistry has influenced significantly the lifestyle of mankind by virtue of their fascinating physicochemical nature, including ultrasmall size (including ultrasall size).
References
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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.
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Nitrogen-Doped Graphene Quantum Dots with Oxygen-Rich Functional Groups
TL;DR: A simple electrochemical approach to luminescent and electrocatalytically active nitrogen-doped GQDs (N-GQDs) with oxygen-rich functional groups is reported, which allows them to be used for biomedical imaging and other optoelectronic applications.
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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.
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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
White‐Light‐Emitting Diodes with Quantum Dot Color Converters for Display Backlights
TL;DR: This work synthesized well passivated green and red light emitting QDs that show almost 100% of QE and demonstrated a 46-inch LCD panel using the white QDLED backlight was successfully demonstrated.