A sequential dual-lock strategy for generation of room-temperature phosphorescence of boron doped carbon dots for dynamic anti-counterfeiting

Yang, Li; Zhang, Qi; Huang, Yueyue; Luo, Canxia; Quan, Zongyan; Li, Hongjuan; Sun, Shiguo; Xu, Yongqian

doi:10.1016/j.jcis.2022.11.062

Cited by 31 publications

(8 citation statements)

References 56 publications

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“…S5c). , For B–C-dots, the broad B 1s spectrum can be fitted by four peaks, located at 191.51, 192.3, 192.86, and 193.35 eV, which might be corresponding to B–N, B–C, BO, and B–O, respectively. , The relative contents of C, N, O, Ca, Cl, and B are summarized in Table S1. The molar content of B in the purified B–C-dots is ∼12.4%.…”

Section: Resultsmentioning

confidence: 99%

Double Emissions in Boron-Doped Carbon Dots for Anticounterfeiting Applications

Li,

Han,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Carbon dots (C-dots) have excellent optical properties and serve as optical building blocks for various potential applications. However, the origin of the double emission in C-dots is still unclear. It is highly desirable to understand deeply the exciton dynamics in double-emission C-dots on the picosecond time scale. Herein, for the first time, double-emission boron-doped carbon dots (B−C-dots) are synthesized with a quantum yield as high as 41.1%. The B−C-dots have an excitation-dependent quantum yield and photoluminescent spectrum. Compared to one dominant energy state in undoped C-dots, B−C-dots exhibited multiple energy states, as proved by femtosecond transient absorption spectroscopy. The controllable double emissions advance the design of a high-level anticounterfeiting code. As a proof-of-concept, by the combination of single-emission and double-emission C-dots, we produced a highly bright excitationdependent photoluminescence code, showing the great potential for anticounterfeiting systems.

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Section: Resultsmentioning

confidence: 99%

Double Emissions in Boron-Doped Carbon Dots for Anticounterfeiting Applications

Li,

Han,

Wang

et al. 2024

ACS Appl. Nano Mater.

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“…For example, Jin and co-workers [164] constructed Rhs/CDs/PVA system by FRET design to achieve tunable emission wavelengths from 486 to 623 nm with a maximum transfer efficiency of 59.93%. Li et al [165] used the same method to achieve multicolor afterglow from blue to green. In addition, urea is often used as self-protecting carbon dots to achieve RTP emission, which was widely reported in previous studies.…”

Section: Non-radiative Energy Transfermentioning

confidence: 99%

“…Li et al. [ 165 ] used the same method to achieve multicolor afterglow from blue to green. In addition, urea is often used as self‐protecting carbon dots to achieve RTP emission, which was widely reported in previous studies.…”

Section: Luminescence Mechanism Of Multicolor Afterglow From Cdsmentioning

confidence: 99%

Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Ran,

Liu,

Zhuang

et al. 2023

Small Methods

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

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“…56 A reversible or non-reversible RTP/TADF transition triggered by mechanical grinding or temperature has been observed in several organic pure organic emitters and carbon dots in silica. 41,[56][57][58][59][60] In contrast, there are rare reports of switching materials that switch between longlived RTP and DF upon exposure to chemical substance stimuli, but such materials are in great demand and need to be addressed.…”

Section: Introductionmentioning

confidence: 99%