scholarly journals Elastic organic crystals with ultralong phosphorescence for flexible anti-counterfeiting

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Kaiwei Huang ◽  
Lulu Song ◽  
Kun Liu ◽  
Anqi Lv ◽  
Manjeet Singh ◽  
...  
Keyword(s):  
Photophysical Property ◽  
Organic Crystals ◽  
Halogen Bonds ◽  
Flexible Materials ◽  
Halogen Atoms ◽  
Highly Efficient ◽  
Flexible Technology ◽  
Potential Applications ◽  
Elastic Crystals

AbstractUltralong organic phosphorescence (UOP) crystals have attracted increased attention due to the distinct photophysical property of a long-lived lifetime. However, organic crystals are generally brittle, leading to a serious problem for their application in flexible technology. Herein, we report three types of elastic organic crystals (EOCs) with ultralong phosphorescence via introducing halogen atoms (Cl, Br, I) into π-conjugated phosphorescent molecules. Especially, the crystal containing iodine atoms displayed both excellent elasticity (ε = 3.01%) and high phosphorescent efficiency (ΦPh = 19.1%) owing to the strong halogen bonds. Taking advantage of its highly efficient UOP and excellent elasticity, we successfully used a DCz4I crystal for anti-counterfeiting application. These findings may provide guidance for the development of elastic crystals with afterglow and expand the scope of potential applications on flexible materials.

Polymer Electroluminescent Devices

MRS Bulletin ◽  
1997 ◽  
Vol 22 (6) ◽  
pp. 31-38 ◽  
Author(s):  
Yang Yang
Keyword(s):  
New York ◽  
Quantum Efficiency ◽  
Operating Voltage ◽  
Organic Crystals ◽  
New York University ◽  
Research Activity ◽  
Information Displays ◽  
Potential Applications ◽  
Bandgap Semiconductors ◽  
The 1960S

Electroluminescence (EL) is the emission of light generated from the radiative recombination of electrons and holes electrically injected into a luminescent semiconductor. Conventional EL devices are made of inorganic direct-bandgap semiconductors, such as GaAs and InGaAs. Recently EL devices based on conjugated organic small molecules and polymers have attracted increasing attention due to easy fabrication of large areas, unlimited choice of colors, and mechanical flexibility. Potential applications of these organic/polymeric EL devices include backlights for displays, alphanumeric displays, and high-density information displays.Electroluminescence from an organic material was first demonstrated in the 1960s on anthracene crystals by Pope et al. at New York University. Subsequently several other groups also observed this phenomenon in organic crystals and thin films. These organic EL devices had high operating voltages and low quantum efficiency. Consequently they did not attract much attention. In 1987 a breakthrough was made by Tang and VanSlyke at Eastman Kodak who found that by using multilayers of sublimated organic molecules, the operating voltage of the organic EL devices was dramatically reduced and the quantum efficiency was significantly enhanced. This discovery touched off a flurry of research activity, especially in Japan. The Japanese researchers, as welt as the group at Kodak, have since improved the device efficiency and lifetime to meet commercial requirements. This progress is reviewed by Tsutsui in this issue.

Highly efficient electrocatalytic oxidation of urea on a Mn-incorporated Ni(OH)2/carbon fiber cloth for energy-saving rechargeable Zn–air batteries

2017 ◽  
Vol 53 (77) ◽  
pp. 10711-10714 ◽  
Author(s):  
Xian Zhang ◽  
Guoqiang Liu ◽  
Cuijiao Zhao ◽  
Guozhong Wang ◽  
Yunxia Zhang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Carbon Fiber ◽  
Energy Saving ◽  
Electrocatalytic Oxidation ◽  
Oxidation Activity ◽  
Highly Efficient ◽  
Carbon Fiber Cloth ◽  
Potential Applications

The introduction of Mn can effectively regulate the electronic structure of Ni hydroxides on CFC, exhibiting superior electrocatalytic oxidation activity toward urea and potential applications in energy-saving rechargeable Zn–air batteries.

Potential Applications in Sewage Bioremediation of the Highly Efficient Pyridine-Transforming Paenochrobactrum sp.

2021 ◽  
Vol 57 (3) ◽  
pp. 344-350
Author(s):  
X. Zhao ◽  
L. Chen ◽  
Q. Ren ◽  
Z. Wu ◽  
S. Fang ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Potential Applications

Highly efficient flexible quantum-dot light emitting diodes with an ITO/Ag/ITO cathode

2017 ◽  
Vol 5 (18) ◽  
pp. 4543-4548 ◽  
Author(s):  
Wenyu Ji ◽  
Ting Wang ◽  
Bingyan Zhu ◽  
Han Zhang ◽  
Rong Wang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Potential Applications

Flexible quantum dot light emitting diodes (QLEDs) are highly desired due to their advantages of foldability, lightweight, and potential applications in lighting and displays.

scholarly journals Highly Efficient Synthesis of Hindered 3-Azoindoles via Metal-Free C–H Functionalization of Indoles

Synthesis ◽  
2020 ◽  
Vol 52 (04) ◽  
pp. 574-580
Author(s):  
Nicolas Jacob ◽  
Lucas Guillemard ◽  
Joanna Wencel-Delord
Keyword(s):  
Steric Hindrance ◽  
Room Temperature ◽  
Efficient Synthesis ◽  
Atom Economy ◽  
Photochromic Compounds ◽  
Metal Free ◽  
Highly Efficient ◽  
Simple Protocol ◽  
Potential Applications

Although 3-azoindoles have recently emerged as an appealing family of photoswitch molecules, the synthesis of such compounds has been poorly covered in the literature. Herein a high-yielding and operationally simple protocol is reported allowing the synthesis of 3-azoindoles, featuring important steric hindrance around the azo motif. Remarkably, this C–H coupling is characterized by excellent atom economy and occurs under metal-free conditions, at room temperature, and within few minutes, delivering the expected products in excellent yields (quantitatively in most of the cases). Accordingly, a library of new molecules, with potential applications as photochromic compounds, is prepared.

scholarly journals Fabrication of CS/GA/RGO/Pd composite hydrogels for highly efficient catalytic reduction of organic pollutants

RSC Advances ◽  
2020 ◽  
Vol 10 (26) ◽  
pp. 15091-15097 ◽  
Author(s):  
Lei Ge ◽  
Meng Zhang ◽  
Ran Wang ◽  
Na Li ◽  
Lexin Zhang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Organic Pollutants ◽  
Self Assembly ◽  
Catalytic Reduction ◽  
Assembly Process ◽  
Composite Hydrogels ◽  
Highly Efficient ◽  
Potential Applications

New functional CS/GA/RGO/Pd composite hydrogels are prepared via a self-assembly process, demonstrating potential applications in catalysis as well as composite materials.

A highly efficient, orange light-emitting (K0.5Na0.5)NbO3:Sm3+/Zr4+ lead-free piezoelectric material with superior water resistance behavior

2015 ◽  
Vol 3 (20) ◽  
pp. 5275-5284 ◽  
Author(s):  
Qiwei Zhang ◽  
Ke Chen ◽  
Leilei Wang ◽  
Haiqin Sun ◽  
Xusheng Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Piezoelectric Material ◽  
Water Resistance ◽  
Lead Free ◽  
Luminescent Materials ◽  
Light Emitting ◽  
Highly Efficient ◽  
Potential Applications ◽  
Rare Earth Doped ◽  
Multifunctional Devices

Multifunctional luminescent materials based on rare earth doped ferro-/piezoelectrics have attracted much attention due to their potential applications in novel multifunctional devices.

Highly efficient and ultrastable visible-light photocatalytic water splitting over ReS2

2016 ◽  
Vol 18 (21) ◽  
pp. 14222-14227 ◽  
Author(s):  
Huimei Liu ◽  
Bo Xu ◽  
J.-M. Liu ◽  
Jiang Yin ◽  
Feng Miao ◽  
...  
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Water Splitting ◽  
Photocatalytic Water Splitting ◽  
Highly Efficient ◽  
Potential Applications ◽  
Visible Light Photocatalytic

ReS2is a stable and efficient photocatalyst with potential applications in the use of solar energy for water splitting.

Red emissive diarylboron diketonate crystals: aggregation-induced color change and amplified spontaneous emission

2015 ◽  
Vol 3 (3) ◽  
pp. 499-505 ◽  
Author(s):  
Lu Wang ◽  
Zhenyu Zhang ◽  
Xiao Cheng ◽  
Kaiqi Ye ◽  
Feng Li ◽  
...  
Keyword(s):  
Solid State ◽  
Spontaneous Emission ◽  
Color Change ◽  
Amplified Spontaneous Emission ◽  
Organic Crystals ◽  
Solid State Lasers ◽  
Red Fluorescence ◽  
Highly Efficient ◽  
Organic Solid ◽  
Organic Solid State

The present study not only provides a rare example of organic crystals with highly efficient red fluorescence but also indicates the possible application of four-coordinate boron materials in organic solid-state lasers.

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