Review of Phosphorescent Carbon Dots and Their Applications DOI
Fan-Yong Yan, Shanshan Li,

Runze Tong

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Language: Английский

Superior Multimodal Luminescence in a Stable Single‐Host Nanomaterial with Large‐Scale Synthesis for High‐Level Anti‐Counterfeiting and Encryption DOI Creative Commons

Bingyin Kong,

Gencai Pan, Mengke Wang

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Multimode luminescent materials exhibit tunable photon emissions under different excitation or stimuli channels, endowing them high encoding capacity and confidentiality for anti-counterfeiting encryption. Achieving multimode luminescence into a stable single material presents promising but remains challenge. Here, the downshifting/upconversion emissions, color-tuning persistent (PersL), temperature-dependent multi-color hydrochromism are integrated Er3+ ions doped Cs2NaYbCl6 nanocrystals (NCs) by leveraging shallow defect levels directed energy migration. The resulting NCs display strong static dynamic colorful in response to ultraviolet, 980-nm laser, X-ray. Additionally, distinct colors as temperature increases from 330 430 K. Surprisingly, it also demonstrates ability of reversible emission modal color water. Theoretical calculations experimental characterizations reveal that self-trapped exciton state (STEs), chlorine vacancy defects, ladderlike 4f contribute multimodal luminescence. More importantly, has extremely remarkable environmental stability, which can be stored air more than 18 months, showing commercial prospects. This work not only gives new insights lanthanide-based metal halide provides route developing nanomaterials

Language: Английский

Citations

1
Cascade energy transfer endows phosphorescent carbon dots-based films with tunable and broadband afterglow for fingerprint recognition and anticounterfeiting DOI

Zhanpeng Liu,

Xinyi Ding, Lin Cai

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160311 - 160311

Published: Feb. 1, 2025

Language: Английский

Citations

1
High-temperature RGB ultralong afterglow carbon dots based on cavity encapsulated by cyclodextrins for anti-counterfeiting and information encryption DOI
Bingyan Han, Chunyang Guo, Fengdi Wang

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 687, P. 701 - 707

Published: Feb. 7, 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
Blue room-temperature phosphorescent carbon dot composites with high quantum yield for information encryption and LED light emission DOI

Shaowen Yang,

Hongmei Zhang,

Ke Jian

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157119 - 157119

Published: Oct. 1, 2024

Language: Английский

Citations

8
Long-Wavelength Afterglow Emission with Nearly 100% Efficiency through Space-Confined Energy Transfer in Organic-Carbon Dot Hybrid DOI

Jinyang Zhu,

Chao Li, Yongsheng Zhu

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(42), P. 13307 - 13314

Published: Oct. 10, 2024

Long-wavelength afterglow emitters are crucial for optoelectronics and information security; however, it remains a challenge in achieving high luminescence efficiency due to the lack of effective modulation electronic coupling nonradiative transitions singlet/triplet excitons. Here, we demonstrate an organic-carbon-dot (CD) hybrid system that operates via space-confined energy transfer strategy obtain bright emission centered at 600 nm with near-unity efficiency. Photophysical characterization theoretical calculation confirm efficient can be assigned synergistic effect intermolecular from triplet excitons CDs singlets subluminophores intense restraint decay losses singlet/triplet-state rationally rigidification amination modification. By utilizing precursor engineering, yellow near-infrared 575 680 efficiencies 94.4% 45.9% has been obtained. Lastly, these highly emissive powders enable superior performance lighting security.

Language: Английский

Citations

7
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
Facile Post‐Processing Approach to Modulate Fluorescent Properties and New Matrix‐Assisted Method to Achieve Solid‐State Luminescence of CDs Based on CTAB Surfactant DOI Open Access
Qingxia Wang, Danyang Zhang,

Tingyu Pan

et al.

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

Published: Jan. 12, 2025

Abstract To realize the practical application of carbon dots (CDs), it is crucial to devise straightforward techniques that can finely modulate fluorescent properties CDs. Apart from that, imperative weaken aggregation‐caused quenching (ACQ) effect, which poses a significant challenge utilization solid‐state In this work, three CDs named as CDs‐1, CDs‐2, and CDs‐3 are synthesized, fluorescence tuning these successfully realized, assisted by cetyltrimethylammonium bromide (CTAB) surfactant, because its unique molecular structure conducive in bolstering intensity adjusting emission wavelength. Furthermore, luminescence achieved employing CTAB substrate matrix‐assisted synthesis composites CDs‐1@CTAB, CDs‐2@CTAB, CDs‐3@CTAB. Notably, photoluminescence quantum yield (PLQY) CDs‐2@CTAB reaches an impressive value high 79.31%, surpassing 70.29% obtained pristine CDs‐2. The experimental results reveal CDs@CTAB exhibit intriguing afterglow characteristics including room temperature phosphorescence (RTP) thermally activated delayed (TADF). This work confirms versatility highlights significance surfactant‐assisted strategies improving performance

Language: Английский

Citations

0
Carbon Dots@Upconversion Nanoparticles: Conjugate Manipulation and Luminophor Confinement Enabling Aqueous‐Phase Orthogonal Multicolor Phosphorescence‐Upconversion Luminescence DOI Open Access
Kang Shao,

Yuqian Jin,

Zaifa Pan

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

Abstract Developing single‐particle nanocomposite with aqueous‐phase orthogonal multicolor phosphorescence or multimodal luminescence holds great significance for optical coding, anti‐counterfeiting encryption, bioimaging, and biosensing. However, it faces challenges such as a limited range of emission wavelengths difficulties in controlling the synthesis process. In this work, conjugate structure manipulation integrated luminophor confinement strategy is proposed to prepare carbon dots@upconversion nanoparticles (CDs@UCNPs) featuring room‐temperature phosphorescence‐upconversion (RTP‐UCL) through wet‐chemical synthetic methods. Four types CDs are synthesized by introducing molecules varying degrees conjugation, while intersystem crossing process enhanced constructing charge‐transfer states narrow energy gap between excited singlet triplet states. Aqueous‐phase RTP (green, yellow, orange) UCL (blue, green, red) achieved confining different conjugation within NaBiF 4 matrix doped various lanthanide ions. Notably, UCNPs can crystallize at low temperatures, serving immobilize CDs, thereby preventing their vibration rotation, minimizing interference from water oxygen. Additionally, versatility demonstrated CDs@Cs 2 NaGdCl 6 : 5%Yb 3+ ,10%Er perovskite nanocomposites. This offers valuable guidance preparation advanced materials.

Language: Английский

Citations

0
Carbon dot composites of multicolor dual-mode phosphorescence and thermally enhanced delayed emission DOI
Nouman Ahmed, Aumber Abbas, Tauqeer Haidar Qamar

et al.

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 111910 - 111910

Published: Jan. 1, 2025

Language: Английский

Citations

0