Polymerized Carbon Dots with Broad Emission and Suppressed Aggregation‐Caused Quenching Effect Toward Electroluminescent White Light‐Emitting Diodes DOI

Danyang Zhang,

Tingyu Pan,

Jingyu Wang

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(28)

Published: July 30, 2024

Abstract Carbon dots (CDs) possess intrinsically broad emission spectra, making them suitable for modulating high‐quality white light‐emitting diodes (WLEDs). However, the chief technical challenge in applying CDs to WLEDs is aggregation‐caused quenching (ACQ) effect. A common solution polymer post‐modification on surface of CDs, which a low‐yield, hard‐to‐purified, and complicated process. Herein, polymerized with (full width at half maxima, FWHM = 187 nm) are synthesized via one‐step solvothermal method. The obtained display excellent solution‐processed film‐forming capabilities, absolute photoluminescence quantum yield as high 4.7% thin film state, creating firm foundation assembling WLEDs. Moreover, polymerization steps analyzed described detail. chains prevent ACQ create new energy levels, resulting an aggregated state. Subsequently, fabricated using single active emitting material. optimal device achieves maximum brightness 337.50 cd m −2 242 nm, covering nearly entire visible spectral window. results present approach obtaining further fabricating WLED straightforward, cost‐effective

Language: Английский

Advances in Shell and Core Engineering of Carbonized Polymer Dots for Enhanced Applications DOI
Boyang Wang, Geoffrey I. N. Waterhouse, Bai Yang

et al.

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(19), P. 2928 - 2939

Published: Sept. 19, 2024

ConspectusCarbon dots (CDs), as a novel type of fluorescent nanocarbon material, attract widespread attention in nanomedicine, optoelectronic devices, and energy conversion/storage due to their excellent optical properties, low toxicity, high stability. They can be classified graphene quantum dots, carbon carbonized polymer (CPDs). Among these, CPDs exhibit tunable structures components that allow fine-tuning making them one the most popular types CDs recent years. However, structural complexity stimulates deep exploration relationship between unique structure luminescent performance. As an organic-inorganic hybrid system, diversity self-limited state cores polymer-hybrid shell layers makes understanding underlying mechanisms structure-property relationships very challenging task. In this context, elucidating composition factors affect properties is vital if enormous potential realized. Achieving controllable with predefined via adoption specific functionalization strategies prized goal current researchers field.In Account, we describe efforts made by our group synthesis, mechanism analysis, regulation, functional applications CPDs, particular emphasis on design core-shell tailored for fields optoelectronics energy. Specifically, through rational selection precursors, optimization reaction conditions, postmodification have demonstrated it possible regulate both core layers, thereby achieving full-spectrum emission, yield, persistent luminescence, thermally activated delayed fluorescence, laser action CPDs. Furthermore, established structure-performance proposed universal strategy synergistic interactions carbon-based surface micronanostructures. addition, unveiled luminescence cross-linked specifically "cross-linking synergistically inducing quantum-state luminescence", which addresses challenge efficient circularly polarized liquid solid phases Subsequently, strong cross-linking, dual-rigidity, ordering preparation methods were introduced, pioneering emission from blue near-infrared wavelengths. Additionally, developed new "confined composite nanocrystals CPDs", leading various high-performance hydrogen evolution catalysts water electrolysis. The not only possessed but also enabled efficiencies field conversion, thus maximizing utilization Finally, discuss important trends CPD research development. Overall, Account summarizes latest advancements years, providing case-studies enable structure-property-performance regulation guiding future expansion application

Language: Английский

Citations

28
Efficient Time‐dependent Dual‐Model Room Temperature Phosphorescent Carbon Quantum Dots/ Boron Nitride Carbide Oxide Matrices DOI Open Access
Weihua Li, Guiju Liu,

Jishuai Lin

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

Citations

6
Efficient Tunable White Emission and Blue Light‐Excited Near‐Infrared Emission in Lead‐Free Metal Halide Crystals with Ultra‐High Luminous Efficiency for Multispectral Image Fusion and 3D Image Reconstruction DOI Open Access
Hui Peng,

Xuda Kan,

Wenjie Huang

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 26, 2025

Abstract 0D hybrid Sb(III) halides generally exhibit unique crystal structure and efficient emission. However, achieving white light blue light‐excited near‐infrared (NIR) emission remains an enormous challenge. Herein, a series of (18‐crown‐6@K) 2 SbX 5 (X = Cl, Br) crystals with different Cl/Br rations are synthesized via supramolecular self‐assembly. All compounds show the broadband emission, which stems from self‐trapped excitons in [SbX ] 2− pseudo‐octahedral structure. Particularly, SbCl shows tunable under various excitation wavelengths, ultra‐high luminous efficiency 92.3% is obtained 310 nm excitation. As Br gradually replaces not only bands red‐shift but also facilitate intersystem crossing process singlet to triplet excitons. Thus, independent NIR upon 450 58.2% SbBr crystals. Moreover, high‐performance single‐component light‐emitting diode (WLED) based on LED fabricated, image fusion realized. Finally, combined multiangle imaging WLED irradiation, 3D reconstruction centrifuge tube wrapped capsule successfully demonstrated.

Language: Английский

Citations

2
Multi‐Stimuli‐Responsive Carbon Dots with Intrinsic Photochromism and In Situ Radical Afterglow DOI

Zhenli Guo,

Yanfang Bian,

Longyan Zhang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 13, 2024

The combination of advanced photoluminescence characteristics to photochromism is highly attractive in preparing high-performance multifunctional photo-responsive materials for optoelectronic applications. However, this rather challenging material design owing the limited mechanism understanding and construction principles. Here, an effective strategy integrate afterglow emission carbon dots (CDs) proposed through embedding naphthaleneimide (NI) structure CDs followed by polyvinylpyrrolidone (PVP) encapsulation. NI-structured CDs-PVP shows intrinsic situ formation NI-radical anions controllable multi-stimuli-responsive behaviors related oxygen-trigged triplet exciton quenching Förster resonance energy transfer (FRET) from pristine photoactivated radicals. Notably, a wide range appearance colors colorless brown, luminescence color transition blue yellow, much elongated lifetime up 253 ms are observed. With extraordinary stimuli-chromic stimuli-luminescent film dynamically responsive multiple external stimuli, reversible secure snapchat, data encryption/decryption synaptic imaging recognition realized. These findings demonstrate fundamental principle photochromic with afterglow, providing important understandings on synergic dynamic thereby expanding their applications information anti-counterfeiting artificial intelligence.

Language: Английский

Citations

15
Multifunctional Thermally Activated Delayed Fluorescence Carbon Dots for Temperature‐Responsive Sensor, Information Encryption, and Organelle Imaging DOI
Hao Li, Chengming Sun, Mengling Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: July 10, 2024

Abstract Thermally activated delay fluorescence (TADF) has great potential for information encryption, temperature detection, and bioimaging due to its long‐lived luminescence, temperature‐sensitive high signal‐to‐noise ratio. However, it is still a challenge establish TADF in aqueous environments. In this study, the composite with (M‐FNCDs) prepared using fluorine‐nitrogen co‐doped carbon dots (FNCDs) melamine. It worth mentioning that M‐FNCDs show stable under long‐wavelength excitation (470 nm) Moreover, distinctive temperature‐responsive properties exhibit good linear relationships range of 77–370 K. Simultaneously, suspension as ink utilized realize encryption/decryption their afterglow cannot be quenched an solution. More importantly, biocompatibility can target mitochondria lysosomes living cells, first time achieve ratio low background signal imaging organelles. This work proposes new strategy prepare solutions extend material applications future.

Language: Английский

Citations

9
Regulation of the unconventional luminescence behaviors of phenylenediamine-based carbon dots with high PLQY values DOI
Pinyi He, Jianliang Bai, Guohui Yang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 160342 - 160342

Published: Jan. 1, 2025

Language: Английский

Citations

1
Dynamic encryption enabled by circularly polarized carbon dot-based afterglow composites featuring hierarchical tri-mode thermochromic emission DOI
H. Wang,

Longming Jin,

Wanqi Mo

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162427 - 162427

Published: April 1, 2025

Language: Английский

Citations

1
Green Fluorescent Carbon Dots with Critically Controlled Surface States: Make Silk Shine via Feeding Silkworms DOI
Zhaofan Wu, Baojuan Wang,

Jia‐Wen Ni

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(31), P. 9675 - 9682

Published: July 26, 2024

Feeding silkworms with functional materials as additives to produce naturally modified silk is a facile, diverse, controllable, and environmentally friendly method low cost of time investment. Among various additives, carbon dots (CDs) show unique advantages due their excellent biocompatibility fluorescence stability. Here, new type green fluorescent (G-CDs) synthesized high oil–water partition ratio 147, isoelectric point 5.16, an absolute quantum yield 71%, critically controlled surface states. After feeding G-CDs, the weave light yellow cocoons whose visible naked eye under UV light. The luminous sewn onto cloth create striking patterns beautiful fluorescence. Such G-CDs have no adverse effect on survival rate life cycle enable whole bodies glow Based strong fluorescence, chemical stability, biological safety, are found in digestive tracts, glands, feces, cocoons, even moth bodies. accumulate posterior glands where fibroin protein secreted, indicating its stronger combination than sericin, which meets requirements for practical applications.

Language: Английский

Citations

5
Photoluminescent Multicolor Carbon Dots for UV Detection and Dynamic Anticounterfeiting DOI
Kailin Zhang, Qiang Fu,

Shouhong Sun

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 19, 2024

Carbon dots (CDs) are an emerging type of fluorescent carbon nanomaterial with broad application prospects. Among them, photochromic CDs have been widely used in the field optoelectronic devices but rarely ultraviolet (UV) detection. In this work, we successfully developed that exhibit reversible emission under light stimulation amine solvent system. Notably, showed ultrafast behavior diethylamine solvent, shifting fluorescence color from cyan-green to orange-red after 2 s irradiation, solution changing pale yellow purple. Furthermore, performance could recover without additional stimuli, simply by standing for several tens seconds. Structural analysis indicated rapid photochromism arises changes surface functional group radicals CDs, reversibility attributed fluctuation these radicals. Leveraging excellent properties further a device detecting UV indices sunlight. This opens up prospects developing high-performance detection based on CDs.

Language: Английский

Citations

4
Room-temperature phosphorescence in coal-based humic acid-derived carbon dots DOI
Ziguo He, Muk‐Fung Yuen, Cheng Zhang

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(17), P. 6333 - 6340

Published: Jan. 1, 2024

Coal-based humic acid derived carbon dots are first prepared as room temperature phosphorescent materials using an innovative, simple and large-scale method, developing a new direction to modulate the emission mechanism of coal-derived dots.

Language: Английский

Citations

4