Multicolor light emission in manganese-based metal halide composites

Article Engineering, Environmental

Excitation-dependent organic phosphors exhibiting different luminescence colors for information anti-counterfeiting

Mengzhu Wang et al.

Summary: By designing and synthesizing novel ORTP materials, the regulation of excitation-dependent luminescence colors has been achieved, showing great potential for advanced applications.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Physical

Zero-Dimensional Lead-Free Halide with Indirect Optical Gap and Enhanced Photoluminescence by Sb Doping

Jiawei Lin et al.

Summary: Three new lead-free organic-inorganic metal halides were synthesized and studied using first principles calculations. One of the OIMHs exhibited an indirect optical gap, which could be significantly enhanced with Sb doping, resulting in a white light-emitting diode with high color-rendering index. This work provides insights into organic spacer selection and chemical doping for improving luminescence performance in 0D metal OIMHs.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2022)

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Article Materials Science, Multidisciplinary

Coordination units of Mn2+ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Guojun Zhou et al.

Summary: This study designs and synthesizes lead-free Mn2+-based halides with different coordination environments, and explores their potential applications in white LEDs through the investigation of their luminescence mechanism.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Engineering, Environmental

Achieving dynamic multicolor luminescence in ZnS:KBr,Mn2+ phosphor for anti-counterfeiting

Xiaofang Wang et al.

Summary: By simultaneously constructing strong host luminescence and heterochromatic doping emissive center in ZnS lattice, a series of ZnS:KBr,x%Mn2+ (x = 0-0.25) phosphors with dynamic multicolor luminescence were obtained. The dynamic multicolor luminescence, achieved by tuning doping concentration, excitation wavelength, and observation time, shows great application potential in high-level secure anti-counterfeiting. After removal of the UV lamp, the phosphors exhibit an orange afterglow in addition to their photoluminescence color.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Physical

Dual-mode luminescent multilayer core-shell UCNPs@SiO2@TEuTbB nanospheres for high-level anti-counterfeiting and recognition of latent fingerprints

Le Li et al.

Summary: In this study, UCNPs@SiO2@TEuTbB nanomaterials with dual-mode luminescence were successfully fabricated for anti-counterfeiting. The synthesized materials exhibited high luminescence intensity, narrow half-peak width, and high stability. The nanomaterials also showed the ability to recognize latent fingerprints on various surfaces under UV lamp, providing valuable evidence in forensic field.

APPLIED SURFACE SCIENCE (2022)

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Article Engineering, Environmental

Printable, room-temperature self-healing and full-color-tunable emissive composites for transparent panchromatic display and flexible high-level anti-counterfeiting

Po Hu et al.

Summary: Luminescent self-healing materials show great potential in optical device applications such as bio-sensing, multicolor displays, and anti-counterfeiting. In this study, a printable, room-temperature self-healing and full-color-tunable luminescent composite was developed through noncovalent binding and physical cross-linking techniques. The composite demonstrated the ability to achieve full-color-tunable emissions under different excitation wavelengths, making it suitable for flexible panchromatic display and high-security-level anti-counterfeiting.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Inorganic & Nuclear

Small Organic Molecular-Based Hybrid Halides with High Photoluminescence Quenching Temperature

Xusheng Zhang et al.

Summary: Organic-inorganic metal halides (OIMHs) with excellent photoelectric properties have been studied. This research reports the synthesis and characterization of three isostructural OIMHs, with (C2H8N)4InCl7 showing the strongest orange-red photoluminescence and high quenching temperature. This indicates their potential for applications in phosphor-converted light-emitting diodes.

INORGANIC CHEMISTRY (2022)

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Article Materials Science, Multidisciplinary

Chirality Induced Crystal Structural Difference in Metal Halide Composites

Weidong Cai et al.

Summary: Incorporating chiral organic compounds into metal halide frames is a common method to introduce chirality in metal halide composites. This study observed significant crystallization differences between the resulting racemic and chiral composites, and found that the structural transformation in the chiral composites can be induced by moisture.

ADVANCED OPTICAL MATERIALS (2022)

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Article Materials Science, Multidisciplinary

High-efficiency red photoluminescence achieved by antimony doping in organic-inorganic halide (C11H24N2)2[InBr6][InBr4]

Jiawei Lin et al.

Summary: Lead-free organic-inorganic metal halides (OIMHs) with various crystal structures and strong broadband emission have great potential for solid-state lighting and display applications. In this study, a new lead-free OIMH with a unique structure was reported, exhibiting high-efficiency red photoluminescence and demonstrating its potential for solid-state lighting.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Chemistry, Multidisciplinary

Highly Efficient and Tunable Emission of Lead-Free Manganese Halides toward White Light-Emitting Diode and X-Ray Scintillation Applications

Tingming Jiang et al.

Summary: Environmentally friendly metal halides, such as tetramethylammonium manganese chloride and tetraethylammonium bromide, have been synthesized and shown to have high photoluminescence quantum yields and good environmental stability. When blended in white light-emitting diodes, they display outstanding luminous efficacy. Under X-ray excitation, these materials demonstrate steady-state X-ray light yields and radiation hardness.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Triple-layer unclonable anti-counterfeiting enabled by huge-encoding capacity algorithm and artificial intelligence authentication

Jingyang Wang et al.

Summary: The security solution utilizes multi-functional nanoinks to create fluorescent and plasmonic security tags, with a triple-layer authentication model combining physical unclonable functions (PUFs), huge-encoding capacity algorithm, and artificial intelligence techniques.

NANO TODAY (2021)

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Article Chemistry, Inorganic & Nuclear

Acentric Organic-Inorganic Hybrid Halide [N(CH3)4]2HgBr2I2 Featuring an Isolated [HgBr2I2]2- Tetrahedron and Second-Order Nonlinearity

Can Yang et al.

Summary: The new hybrid compound, [N(CH3)(4)](2)HgBr2I2, crystallized in a non-centrosymmetric space group and exhibited unique optical and thermal properties. Experimental results indicated that it formed pseudo-one-dimensional chain structures connected by hydrogen bonds, with a rare high-temperature phase transition observed. Theoretical calculations further demonstrated its potential for future applications in fluorescence and nonlinear optics.

INORGANIC CHEMISTRY (2021)

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Article Chemistry, Physical

Reversible Luminescent Vapochromism of a Zero-Dimensional Sb3+-Doped Organic-Inorganic Hybrid

Yue Wu et al.

Summary: Doping of photoactive metal ions effectively modulates the photophysical properties of perovskite, leading to enhanced emission peak and red-shifted emission. The reversible luminescent vapochromism of the material was investigated, and a potential application as a DMF sensor with stable and producible luminescent changes was demonstrated.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

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Article Materials Science, Multidisciplinary

High-security anti-counterfeiting through upconversion luminescence

Hao Suo et al.

Summary: Upconversion luminescence converts near-infrared excitation into ultraviolet and visible emissions, providing high-security optical codes for anti-counterfeiting applications with great potential.

MATERIALS TODAY PHYSICS (2021)

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Article Nanoscience & Nanotechnology

Bi and Sb Codoped Cs2Ag0.1Na0.9InCl6 Double Perovskite with Excitation-Wavelength-Dependent Dual-Emission for Anti-Counterfeiting Application

Xiang Li et al.

Summary: The Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 double perovskite material emits blue and yellow lights under the 320 and 360 nm UV lamp, respectively. It also exhibits a high PLQY up to 41% and excellent stability against both air and high temperature, making it a promising anti-counterfeiting material.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Materials Science, Multidisciplinary

High Stability and Strong Luminescence CsPbBr3/Cs4PbBr6 Perovskite Nanocomposite: Large-Scale Synthesis, Reversible Luminescence, and Anti-Counterfeiting Application

Ze Wang et al.

Summary: A CsPbBr3/Cs4PbBr6 nanocomposite with high PLQY and product yield was successfully synthesized using a low-temperature self-assembly strategy, showing good PL performance and stability. The reversible luminescence phenomenon can be achieved through a simple wetting and drying process, making it suitable for anti-counterfeiting applications.

ADVANCED MATERIALS TECHNOLOGIES (2021)

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Article Chemistry, Multidisciplinary

A multi-responsive indium-viologen hybrid with ultrafast-response photochromism and electrochromism

Qiu-Yue Pan et al.

Summary: In this study, a novel 0D organic-inorganic metal halide hybrid was synthesized, showing reversible and ultrafast photochromic properties induced by UV/sunlight/X-ray, as well as excellent electrochromic performance. This is the first example of an indium-based organic-inorganic chromic hybrid.

CHEMICAL COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

A green-synthesized phosphorescent carbon dot composite for multilevel anti-counterfeiting

Wenjie Jiang et al.

Summary: This study developed an environmentally friendly room temperature phosphorescent composite with ultra-long phosphorescence lifetime and outstanding afterglow feature. The moisture sensitive afterglow was utilized for multi-level anti-counterfeiting and complex decryption of encrypted information.

NANOSCALE ADVANCES (2021)

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Article Chemistry, Inorganic & Nuclear

Co-luminescence in a zero-dimensional organic-inorganic hybrid antimony halide with multiple coordination units

Zhi-Zhuan Zhang et al.

Summary: This study introduces a lead-free 0D-OIMH compound with two distinct mononuclear [SbXn](3-n) units in the structure. The optical absorption, variable photoluminescence and structural effects on photoluminescence of antimony-based 0D-OIMHs are discussed in detail, providing guidance for constructing Sb-based 0D OIMHs composed of multiple halometallate species.

DALTON TRANSACTIONS (2021)

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Article Materials Science, Multidisciplinary

A straightforward approach for high-end anti-counterfeiting applications based on NIR laser-driven lanthanide doped luminescent glasses

Naji Vahedigharehchopogh et al.

Summary: This study demonstrates a simple and inexpensive method for color tuning of thermally and chemically stable Ho3+/Tm3+/Yb3+ doped tellurite glasses. By manipulating the emission band ratios through focusing/defocusing the NIR laser beam, impressive up-conversion quantum yield values up to 4.56% and high lifetime values of approximately 100 to 200 microseconds are obtained. By creating anti-counterfeiting patterns using this method, different emission colors can be observed easily, highlighting the potential use of lanthanide doped glasses in anti-counterfeiting applications.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Chemistry, Multidisciplinary

A lead-free bismuth iodide organic-inorganic ferroelectric semiconductor

Yu-Hua Liu et al.

Summary: This study presents a lead-free bismuth iodide ferroelectric semiconductor with a high Curie temperature and a small band gap, smaller than most lead halide counterparts.

CHEMICAL COMMUNICATIONS (2021)

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The Second Near-Infrared Window Persistent Luminescence for Anti-Counterfeiting Application

Changqiu Ma et al.

CRYSTAL GROWTH & DESIGN (2020)

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Lanthanide-Doped Core@Multishell Nanoarchitectures: Multimodal Excitable Upconverting/Downshifting Luminescence and High-Level Anti-Counterfeiting

Hai Huang et al.

SMALL (2020)

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K2CuX3 (X = Cl, Br): All-Inorganic Lead-Free Blue Emitters with Near-Unity Photoluminescence Quantum Yield

Tielyr D. Creason et al.

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Luminescent manganese(II) complexes: Synthesis, properties and optoelectronic applications

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Energy Manipulation in Lanthanide-Doped Core-Shell Nanoparticles for Tunable Dual-Mode Luminescence toward Advanced Anti-Counterfeiting

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Glass-limited Yb/Er:NaLuF4 nanocrystals: reversible hexagonal-to-cubic phase transition and anti-counterfeiting

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Reversible luminescent humidity chromism of organic-inorganic hybrid PEA2MnBr4 single crystals

Wanru Gao et al.

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Excitation Wavelength-Dependent Dual-Mode Luminescence Emission for Dynamic Multicolor Anticounterfeiting

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Upconversion Nanoparticles@Carbon Dots@Meso-SiO2 Sandwiched Core-Shell Nanohybrids with Tunable Dual-Mode Luminescence for 3D Anti-Counterfeiting Barcodes

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LANGMUIR (2019)

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Lead-Free Hybrid Metal Halides with a Green-Emissive [MnBr4] Unit as a Selective Turn-On Fluorescent Sensor for Acetone

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Hybrid Metal Halides with Multiple Photoluminescence Centers

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A spatial/temporal dual-mode optical thermometry platform based on synergetic luminescence of Ti4+-Eu3+ embedded flexible 3D micro-rod arrays: High-sensitive temperature sensing and multi-dimensional high-level secure anti-counterfeiting

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Manganese(II) in Tetrahedral Halide Environment: Factors Governing Bright Green Luminescence

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Design of novel lanthanide-doped core-shell nanocrystals with dual up-conversion and down-conversion luminescence for anti-counterfeiting printing

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Efficient modulation of photoluminescence by hydrogen bonding interactions between inorganic [MnBr4]2- anions and organic cations

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Spatially confined luminescence process in tip-modified heterogeneous-structured microrods for high-level anti-counterfeiting

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Multicolor light emission in manganese-based metal halide composites

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