Tunable color emission of transparent boron nitride nanophosphors towards anti-counterfeiting application

Jung, Jae‐Yong; Song, Byung-Kwan; Kim, Young-Kuk

doi:10.1016/j.jallcom.2019.03.269

Cited by 22 publications

(7 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…= 14,000). The solution was printed on banknotes with a brush and then dried at 80 °C for 1 h. The colors of the phosphor thin films were confirmed using the UV lamp [27]. The main peak (112) phase showed the strongest signal, and the other signals also matched International Center for Diffraction data (ICDD # 00-008-0457).…”

Section: Bawo4:re 3+ Phorsphors For Anti-counterfeiting Applicationmentioning

confidence: 94%

See 1 more Smart Citation

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

et al. 2020

Self Cite

View full text Add to dashboard Cite

Barium tungstate (BaWO4) powders with various sintering temperatures, and BaWO4:Dy3+ phosphor samples with concentrations of different rare-earth (RE) activator ions (Dy3+, Sm3+, Tb3+) were prepared through co-precipitation. The structural, morphological, and photoluminescent characteristics of barium tungstate phosphors depend on the concentration of RE ions. The crystallographic characteristics of the synthesized BaWO4 were analyzed using X-ray diffraction (XRD) patterns. The size and shape of the crystalline particles were estimated based on images measured with a field emission scanning electron microscope (FE-SEM). As the sintering temperature of the BaWO4 particles increased from 400 °C to 1000 °C, the size of the particles gradually increased and showed a tendency to clump together. In the sample doped with 7 mol % Dy3+ ions, the intensity of all emission bands reached their maximum. The emission spectra of the RE3+-doped BaWO4 powders by excitation at 325 nm were composed of yellow (Dy3+), red (Sm3+), and green (Tb3+) band at 572, 640, and 544 nm. This indicates that most of the RE3+ ions absorbed the position without reversal symmetry in the BaWO4 lattice. These results propose that strong emission intensity and tunable color for the phosphors can be accomplished by rare-earth doped host with an suitable quantity. In addition, the phosphor thin films, having high transparency from aqueous colloidal solutions, were deposited on banknotes, and it is considered whether it is suitable for anti-counterfeiting applications.

show abstract

Section: Bawo4:re 3+ Phorsphors For Anti-counterfeiting Applicationmentioning

confidence: 94%

“…= 14,000). The solution was printed on banknotes with a brush and then dried at 80 • C for 1 h. The colors of the phosphor thin films were confirmed using the UV lamp [27]. insulating samples was calibrated using the C1 of 285 eV.…”

Section: Bawo 4 :Re 3+ Phorsphors For Anti-counterfeiting Applicationmentioning

confidence: 99%

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…At present, counterfeiting and information leakage seriously threaten people’s interests to physical and mental health. − Consequently, there is an urgent demand for new anti-counterfeiting technologies for minimizing economic damage and protecting public safety. − Compared to the traditional technologies, such as QR codes, bar code, hologram, watermarking, engraving gravure printing technology, and digital security technology, the luminescence anti-counterfeiting technique has been widely adopted due to its facile design, excellent concealment, and high stability. − However, most of the traditional fluorescent materials used for anti-counterfeiting have shortcomings such as monochrome emission and fixed excitation, which reduce the anti-counterfeiting level and can be easily forged. Therefore, it cannot satisfy the actual needs of people. − Thus, there is an urgent need to develop innovative multiple anti-counterfeiting luminescent materials with intentionally designed color or well-defined tunable properties for information security. , …”

Section: Introductionmentioning

confidence: 99%

Multimodal and Multicolor Anti-counterfeiting Realized in CaCd₂Ga₂Ge₃O₁₂ with a Single Activator of Mn²⁺

et al. 2022

View full text Add to dashboard Cite

The continuously growing significance of information security and authentication has put forward many new requirements and challenges for modern luminescent materials and anti-counterfeiting technologies. Recently, luminescent materials have attracted much attention in this field owing to their legibility, repeatability, multicolor, and multiple stimuli-responsive nature. In this work, the efficient multicolor and multimodal luminescence material CaCd2Ga2Ge3O12:Mn2+ was successfully designed and synthesized using the strategy of single-doped Mn2+ in a single matrix. Also, we combined the morphology, crystal structure, energy band calculation, luminescence properties, and trap analysis to study the optical data storage capacity of CaCd2Ga2Ge3O12:Mn2+. Interestingly, in the presence of the 254 nm UV lamp, the sample can exhibit a tunable emission color from bule to cyan to yellow by increasing the dopant concentration of Mn2+. Also, under the afterglow and thermoluminescence luminescence modes, it presented strong yellow emission centered at 558 nm. Based on the advantage of multiple tunable luminescence, samples were made into anti-counterfeiting ink and were used to print four optical devices through the screen printing technology. The results show that the material has excellent multicolor anti-counterfeiting properties under the three luminescence modes, which has contributed to the development of many kinds of luminescent anti-counterfeiting materials for security purposes.

show abstract

“…Recently, we synthesized cerium (Ce 3+ )-doped BN nanoplatelets and observed blue-light emission excited by near-ultraviolet (UV) light. , However, the luminescence spectrum of Ce 3+ -doped BN is concentrated at the deep blue wavelength (∼410 nm), which is tremendously offset from the maximum photoluminescence (PL) wavelength (∼550 nm) of the human eye. Efficient methods can be provided in a variety of matrix materials to achieve efficient green emission. − …”

Section: Introductionmentioning

confidence: 99%

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Jung

Shim

Son

et al. 2021

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

White-emitting hexagonal boron nitride (h-BN) nanophosphors were synthesized via pyrolysis (1200 °C). The nanoparticle phosphors were prepared by chemical mixed molecular adduction in which the starting materials were boric acid, melamine, cerium nitrate (Ce 3+ ), and dysprosium nitrate (Dy 3+ ). The nanoparticle phosphors showed blue-yellow emission activated by attendant incorporation of Ce 3+ and Dy 3+ when excited under ultraviolet (UV) light. This color emission was modified from blue to yellow by adjusting the atomic ratio of rare earth elements ([Dy + ]/[Ce 3+ ]) without interruption of the crystal structure of h-BN. Photoluminescent (PL) intense yellow emission was realized in BN:Ce 3+ /Dy 3+ phosphors at [Dy + ]/[Ce 3+ ] = 0.5, and the characteristic Ce 3+ emission peaks of 4f−5d at 480 nm and Dy 3+ due to the transitions of 4 F 9/2 → 6 H 15/2 at 480 nm, 4 F 9/2 → 6 H 13/2 at 575 nm, and 4 F 9/2 → 6 H 11/2 at 662 nm were observed in the PL emission spectra. However, further addition of Dy 3+ ions exchanged the phase in h-BN to dysprosium borate (DyBO 3 ), according to X-ray diffraction results, and decreased luminescence properties, according to PL findings. In addition, the synthesized nanophosphors showed white emission under UV light for thin films that would be suitable for deep-UV detection and anticounterfeiting applications, which require the film to be hidden and identifiable only by macroscopic examination. In addition, the co-doped nanophosphors can be applied to white-emitting LED glass discs.

show abstract

Tunable color emission of transparent boron nitride nanophosphors towards anti-counterfeiting application

Cited by 22 publications

References 42 publications

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

Multimodal and Multicolor Anti-counterfeiting Realized in CaCd₂Ga₂Ge₃O₁₂ with a Single Activator of Mn²⁺

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Contact Info

Product

Resources

About

Tunable color emission of transparent boron nitride nanophosphors towards anti-counterfeiting application

Cited by 22 publications

References 42 publications

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

Multimodal and Multicolor Anti-counterfeiting Realized in CaCd2Ga2Ge3O12 with a Single Activator of Mn2+

Boron Nitride Nanoparticle Phosphors for Use in Transparent Films for Deep-UV Detection and White Light-Emitting Diodes

Contact Info

Product

Resources

About

Multimodal and Multicolor Anti-counterfeiting Realized in CaCd₂Ga₂Ge₃O₁₂ with a Single Activator of Mn²⁺