Controllable and large-scale synthesis of carbon quantum dots for efficient solid-state optical devices

Nano Energy, Год журнала: 2024, Номер 122, С. 109289 - 109289

Опубликована: Янв. 13, 2024

Carbon quantum dots (C-dots) showed excellent structure-tunable optical properties, mainly composed of carbon, nitrogen and oxygen. They have been used for various types solid-state devices. Due to the photoluminescence quenching caused by aggregation, it is a challenge produce high yield large Stokes shift C-dots via controllable simple approaches. In this work, we demonstrated microwave assisted heating approach high-quality production with ten grams scale per batch in less than 4 min. The addition metal cation promoted formation foam-structure forming carboxyl-metal-amine complex, enabling spatial confined growth solid-state, contributing (QY) 73% 0.65 eV. By tuning structure C-dots, excitation dependent independent photoluminescent (PL) behavior were achieved because different energy states evidenced transient PL femtosecond absorption spectroscopy. These properties enable be successfully integrated luminescent solar concentrators (LSCs), having an external efficiency 3.0% power conversion 1.3% (225 cm2) excitation-dependent high-level anticounterfeiting fluorescent code, showing great potential system.

Язык: Английский

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Heterostructure with tightly-bound interface between In2O3 hollow fiber and ZnIn2S4 nanosheet toward efficient visible light driven hydrogen evolution

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 345, С. 123697 - 123697

Опубликована: Янв. 3, 2024

Язык: Английский

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Highly efficient and high color rendering index multilayer luminescent solar concentrators based on colloidal carbon quantum dots

Chemical Engineering Journal, Год журнала: 2023, Номер 481, С. 148441 - 148441

Опубликована: Дек. 31, 2023

Язык: Английский

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Long-lived dynamic room temperature phosphorescent carbon dots for advanced sensing and bioimaging applications

Coordination Chemistry Reviews, Год журнала: 2024, Номер 516, С. 215987 - 215987

Опубликована: Май 31, 2024

Язык: Английский

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Carbon quantum dots: A systematic overview of recent developments in synthesis, properties, and novel therapeutic applications

Inorganic Chemistry Communications, Год журнала: 2024, Номер 165, С. 112492 - 112492

Опубликована: Май 9, 2024

Язык: Английский

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Comprehensive Overview of Controlled Fabrication of Multifunctional Fluorescent Carbon Quantum Dots and Exploring Applications

Small, Год журнала: 2024, Номер 20(29)

Опубликована: Фев. 11, 2024

Abstract In recent years, carbon dots (CDs) have garnered increasing attention due to their simple preparation methods, versatile performances, and wide‐ranging applications. CDs can manifest various optical, physical, chemical properties including quantum yield (QY), emission wavelength (Em), solid‐state fluorescence (SSF), room‐temperature phosphorescence (RTP), material‐specific responsivity, pH sensitivity, anti‐oxidation oxidation, biocompatibility. These be effectively regulated through precise control of the CD process, rendering them suitable for diverse However, lack consideration given each feature during process poses a challenge in obtaining requisite features This paper is analyze existing research present novel concepts ideas creating with different distinct The synthesis methods are discussed first section, followed by comprehensive overview important modification strategy. Subsequently, application reviewed. Finally, outlines current challenges controlling applications, discusses potential solutions, offers suggestions future research.

Язык: Английский

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In-situ decorated cobalt phosphide cocatalyst on Hittorf's phosphorus triggering efficient photocatalytic hydrogen production

Chinese Journal of Structural Chemistry, Год журнала: 2024, Номер 43(2), С. 100242 - 100242

Опубликована: Фев. 1, 2024

Язык: Английский

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Highly Efficient Luminescent Solar Concentrators Based on Capped Carbon Quantum Dots with Unity Quantum Yield

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 12, 2025

Abstract Luminescent solar concentrators (LSCs) can convert sunlight to clean energy by serving as large‐area collectors of sunlight. Benefiting from their large‐area, semi‐transparency, and lightweight characteristics, LSCs have gained a great attention. However, optical efficiency is limited the low quantum yield (QY) small Stokes shift conventional photoluminescent materials. Carbon dots (C‐dots) are promising alternatives, yet achieving both high QY large has proven challenging. Here, simple, controllable vacuum heating method introduced synthesize highly efficient C‐dots using citric acid‐urea‐cyanuric acid‐CaCl 2 system. The cyanuric acid‐capped exhibit outstanding properties, including 94.3% in solution 100% polymer matrix, 0.64 eV, exceptional photostability, making them ideal for LSC applications. Ultrafast transient absorption spectroscopy provides insights into exciton dynamics. An (25 cm ) based on these achieves an 13.82% ± 0.30%, while its attached photovoltaic cell attains power conversion 4.82% 0.10% under natural (80 mW −2 ), marking highest performance reported C‐dot‐based LSCs. These results highlight potential advanced solid‐state lighting technologies.

Язык: Английский

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Efficient Time‐dependent Dual‐Model Room Temperature Phosphorescent Carbon Quantum Dots/ Boron Nitride Carbide Oxide Matrices

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract Room temperature phosphorescence (RTP) materials have broad applications in the field of optical devices due to tunable wavelengths and lifetimes. However, creating efficient RTP that possess multiple properties remains a challenge. Herein, novel approach is developed situ form carbon quantum dots (C‐dots) embedded boron nitride carbide oxide (B‐N‐C‐O) matrices by introducing nitrogen, phosphorus, dopants into C‐dots (P/B/N doped C‐dots), enabling dual emissions time‐dependent afterglow. P/B/N are synthesized vacuum‐assisted gradient heating using ethylenediamine, phosphoric acid, boric acid as precursors with yield 20 g per batch. The introduction provided triplet states, which enable and, long phosphorescent lifetime ranging from 0.98 1.30 s. formation surrounding enables ultrahigh up 50%, surpassing most recently reported C‐dots. To demonstrate potential C‐dots, they used anti‐counterfeiting ink dyes for security codes polyester yarn, showing their suitability high‐level applications. This work provides an effective route large‐scale synthesis highly preparation high‐performance devices.

Язык: Английский

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Large Scale Synthesis of Carbon Dots and Their Applications: A Review

Molecules, Год журнала: 2025, Номер 30(4), С. 774 - 774

Опубликована: Фев. 7, 2025

Carbon dots (CDs), a versatile class of fluorescent carbon-based nanomaterials, have attracted widespread attention due to their exceptional optical properties, biocompatibility, and cost-effectiveness. Their applications span biomedicine, optoelectronics, smart food packaging, yet large-scale synthesis remains significant challenge. This review categorizes methods into liquid-phase (hydrothermal/solvothermal, microwave-assisted, magnetic hyperthermia, aldol condensation polymerization), gas-phase (plasma synthesis), solid-phase (pyrolysis, oxidation/carbonization, ball milling), emerging techniques (microfluidic, ultrasonic, molten-salt). Notably, microwave-assisted solid-state show promise for industrial production scalability efficiency. Despite these advances, challenges persist in optimizing reproducibility, reducing energy consumption, developing purification quality control strategies. Addressing issues will be critical transitioning CDs from laboratory research real-world applications.

Язык: Английский

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