Recent Advances of Carbon Dots with Afterglow Emission

Small, Год журнала: 2023, Номер 19(31)

Опубликована: Фев. 21, 2023

Abstract Carbon dots (CDs) have gradually become a new generation of nano‐luminescent materials, which received extensive attention due to excellent optical properties, wide source raw low toxicity, and good biocompatibility. In recent years, there are many reports on the luminescent phenomenon CDs, great progress has been achieved. However,there rarely systematic summaries CDs with persistent luminescence. Here, summary including luminous mechanism, synthetic strategies, property regulation, potential applications, is given. First, brief introduction given development materials. Then, mechanism afterglow from room temperature phosphorescence (RTP), delayed fluorescence (DF), long luminescence (LPL) discussed. Next, constructed methods materials summarized two aspects, matrix‐free self‐protected matrix‐protected CDs. Moreover, regulation properties color, lifetime, efficiency presented. Afterwards, applications such as anti‐counterfeiting, information encryption, sensing, bio‐imaging, multicolor display, LED devices, etc., reviewed. Finally, an outlook proposed.

Язык: Английский

---

Intense Circularly Polarized Fluorescence and Room-Temperature Phosphorescence in Carbon Dots/Chiral Helical Polymer Composite Films

ACS Nano, Год журнала: 2023, Номер 17(7), С. 6912 - 6921

Опубликована: Март 31, 2023

Chiral carbon dots (C-dots) with a circularly polarized fluorescence (CPF) property have attracted tremendous attention due to their significant applications in chiral optoelectronics and theranostics. However, constructing room-temperature phosphorescent (CPRTP) C-dots remains great challenge. Herein, strategy is established achieve efficient CPF CPRTP emissions C-dots/chiral helical polymer bilayer composite film. Taking advantage of the filter effect polymer, intense large dissymmetric factors up 1.4 × 10-1 1.2 10-2 are respectively obtained, even though there only simple interface contact between layer layer. More importantly, white-color emission multiple information display encryption further realized based on prepared luminescent films.

Язык: Английский

---

Polymer–Structure‐Induced Room‐Temperature Phosphorescence of Carbon Dot Materials

Small Structures, Год журнала: 2023, Номер 4(5)

Опубликована: Фев. 2, 2023

As emerging carbon‐based nanomaterials, carbon dots (CDs) are widely studied with regard to their luminescent properties. CDs obtained by the bottom‐up method exhibit polymeric characteristics after crosslinking, polymerization, and incomplete carbonization processes, herein referred as carbonized polymer (CPDs). In recent years, large progress has been achieved on room‐temperature phosphorescence (RTP) properties of CPDs. The developments synthesis strategies for RTP CPD materials reviewed. However, less attention devoted influence structures materials. Polymer a common feature extensive key factors facilitating Herein, effects emission self‐protective matrix‐assisted discussed. It is considered that can effectively immobilize subluminophores protect triplet excited states facilitate crosslink‐enhanced (CEE) effect proposed further explain materials, which provide an effective strategy Benefiting from CEE effect, efficient be applications then briefly summarized.

Язык: Английский

---

Application of room-temperature phosphorescent carbon dots in information encryption and anti-counterfeiting

Nano Today, Год журнала: 2024, Номер 55, С. 102200 - 102200

Опубликована: Фев. 13, 2024

Язык: Английский

---

Recent advancements of solid-state emissive carbon dots: A review

Coordination Chemistry Reviews, Год журнала: 2023, Номер 498, С. 215469 - 215469

Опубликована: Сен. 29, 2023

Язык: Английский

---

Doped Carbon Dots Enable Highly Efficient Multiple‐Color Room Temperature Phosphorescence

Advanced Optical Materials, Год журнала: 2023, Номер 12(7)

Опубликована: Окт. 26, 2023

Abstract Colloidal carbon dots (C‐dots) are considered as promising heavy‐metal‐free materials to achieve room‐temperature phosphorescence (RTP) properties for applications, such photoelectronic devices, information encryption, and bio‐imaging. However, most of the current obtained RTP C‐dots have a short lifetime with relatively low quantum yield (QY). In this work, large‐scale synthesized via vacuum heating approach multiple emissions (blue, green, yellow), long high 1.92 s, QY 34.4% by selecting different types precursors, which is superior reported C‐dots. The atoms doping strong bonding between neighbored promoted contributes excellent properties. As proof‐of‐concept, as‐obtained used optical ink flexible security codes, exhibiting bright shape 1.37 s. This work offers an efficient producing high‐quality C‐dots, can be applied anti‐counterfeiting encryption systems.

Язык: Английский

---

Red/NIR C-dots: A perspective from carbon precursors, photoluminescence tuning and bioapplications

Carbon, Год журнала: 2024, Номер 219, С. 118838 - 118838

Опубликована: Янв. 17, 2024

Язык: Английский

---

Phosphorescent carbon dots: Intermolecular interactions, properties, and applications

Coordination Chemistry Reviews, Год журнала: 2024, Номер 503, С. 215642 - 215642

Опубликована: Янв. 2, 2024

Язык: Английский

---

Afterglow of Dual‐Confined Carbon Dots Ranging from Blue to Near‐Infrared

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Март 7, 2024

Abstract Comprehensive research into afterglow emission in the near‐infrared (NIR) region of carbon dots (CDs) is currently lacking. In this study, highly efficient multicolor CDs are synthesized with fluorescence from blue to NIR using Rhodamine 6G. Boron oxide (B 2 O 3 ) employed as a matrix for encapsulating and confining CDs, inhibiting triplet exciton quenching. Furthermore, structural rigidity enhanced due formation carbon‐boron (C─B) covalent bonds between B , achieving tunable ranging 463 722 nm lifetimes up 801 ms. The green–yellow composite exhibits an impressive quantum yield 37.67% while demonstrating thermally activated delayed (TADF). Thus, coated onto alternating‐current light‐emitting diode (BAC‐LED) fabricate white AC‐LED, which successfully prepared Commission Internationale de L'Eclairage (CIE) at coordinates (0.32, 0.34), accompanied by color rendering index (CRI) reaching 81.1. bright compensates zero‐point flickering BAC‐LED, resulting stable gentle emission. potential applications these luminescent materials optoelectronic devices undoubtedly widened remarkable advancement.

Язык: Английский

---

Time-Dependent and Excitation-Dependent Afterglow Color Evolution from the Assembly of Dual Carbon Dots in Zeolite

Nano Letters, Год журнала: 2024, Номер 24(6), С. 1859 - 1866

Опубликована: Янв. 30, 2024

Afterglow materials with time-dependent color output emerge as huge prospects in advanced optical information encryption but remain a formidable challenge due to the limited exciton transfer from single emission center. Here, multiple afterglow evolutions are achieved by strategy of controllable assembly dual carbon dots (CDs) an individual and decay rate into RHO zeolite. The possesses high controllability such that B-CDs G-CDs can be independently generated situ embedded matrix; particular, doped amount two kinds CDs adjusted conveniently produce interesting variable colors. Triggered different excitations, prepared B&G-CDs@RHO composites exhibit conversion TADF RTP behaviors, well deep-blue green (365 nm excitation) static cyan (254 excitation). unique luminescence excellent stability allow composite applied high-security levels.

Язык: Английский

---