One‐Step Fabrication of New PCPNs with Unique Optical Responses for Ultra‐Stable Anti‐Counterfeiting Labels

Advanced Functional Materials, Год журнала: 2024, Номер 34(26)

Опубликована: Фев. 25, 2024

Abstract Constructing a library of stable phosphors with unconventional fluorescence (FL) and room temperature phosphorescence (RTP) color combination is an effective approach to enhance anti‐counterfeiting strength, but remains challenge. Herein, one‐step strategy proposed fabricate ultra‐stable CsPbX 3 /carbon dots (CDs) @NH 4 AlP 2 O 7 (X = Cl, Br, I) nanocomposites (PCPNs) full‐spectrum FL emission constant short‐wavelength blue RTP emission, breaking the conventional luminescent properties that generally exhibit obvious wavelength red‐shifts compared FL. The enhanced full‐color (457–612 nm) emissions are implemented by adjusting halogen compositions, which attributed as dominant center. Owing CDs, long‐lived lasting 12 s observed from PCPNs. Additionally, PCPNs remarkable tolerance prolonged ultraviolet irradiation erosion solutions various pH solvents, supported NH inert shell stabilizing perovskite structure triplet state. When ink based on printed substrates, fine labels combinations formed show excellent solvent resistance mechanical stability. This study provides fresh perspectives development security strength long‐term effects.

Язык: Английский

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High pH Stability and Ultralong‐Lived Room Temperature Phosphorescence Carbon Dots in Aqueous Environment

Advanced Optical Materials, Год журнала: 2024, Номер 12(16)

Опубликована: Апрель 27, 2024

Abstract Long‐lived room temperature phosphorescence (RTP) materials have many potential applications in areas such as luminescent lighting, biological imaging, and information security owing to their unique optical properties. However, traditional RTP are challenged by the fact that can be easily quenched dissolved oxygen solvent‐assisted relaxation, making it difficult for them emit aqueous solutions, particularly extreme pH environments. In this study, a multicolor carbon dot‐based composite material (u‐CDs) is developed with urea 3‐aminophenylboronic acid raw materials. This exhibits ultra‐long emission lifetime high stability constructing rigid hydrogen bond network structure an environment. The u‐CDs optimal of 448 nm, quantum yield 21.6%, 2.35 s, afterglow time more than 50 s. With properties, great anti‐counterfeiting, encryption, 3D printing.

Язык: Английский

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Review of Phosphorescent Carbon Dots and Their Applications

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Язык: Английский

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Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Small Methods, Год журнала: 2023, Номер 8(1)

Опубликована: Окт. 27, 2023

Abstract Carbon dots (CDs), as emerging long afterglow luminescent material, have attracted the attention of researchers and become one hot topics in materials. In recent years, obtained a series CDs‐based materials with different properties utilizing matrix‐assisted self‐protective methods. To meet diverse application needs, development multicolor is focus challenge this field. Most previously reported generally emit blue or green afterglow. Recently, some systems been discovered, emission range can extend from ultraviolet to near‐infrared. However, there lack systematic in‐depth analysis regarding preparation strategy luminescence mechanism Based on this, review summarizes strategies raw reaction parameters. Then, mechanisms are analyzed seven factors, including carbonization degree, surface state, aggregation temperature dependence, excitation multi‐emission center, energy transfer. Moreover, applications introduced. Finally, problems challenges field discussed, future directions analyzed.

Язык: Английский

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The afterglow of carbon dots shining in inorganic matrices

Materials Horizons, Год журнала: 2023, Номер 11(1), С. 113 - 133

Опубликована: Окт. 5, 2023

This is a comprehensive and systematic review focusing on CDs@IMs from multiple perspectives of construction, performance, mechanism, multifunctional applications.

Язык: Английский

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