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793 Newest Publications about the topic leds

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An inexpensive NIR LED Webcam photometer for detection of adulterations in hydrated ethyl alcohol fuel

10-Sep-2017 | Author(s): Hebertty V. Dantas, Mayara F. Barbosa, Anderson Pereira, Márcio J.C. Pontes, Pablo N.T. Moreira ..., Microchemical Journal, 2017

Publication date: November 2017 Source:Microchemical Journal, Volume 135 Author(s): Hebertty V. Dantas, Mayara F. Barbosa, Anderson Pereira, Márcio J.C. Pontes, Pablo N.T. Moreira, Mário C.U. Araújo In this study an inexpensive near infrared light emitting diodes (NIR LEDs) ...

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Microemulsion mediated synthesis and properties of uniform Ln:CaWO4 (Ln = Eu, Dy) nanophosphors with multicolor luminescence for optical and CT imaging

07-Sep-2017 | Mariano Laguna, Nuria O Nuñez, Francisco J García, Ariadna Corral, Angel Parrado-Gallego, Marcin Balcerzyk, Ana I ..., European Journal of Inorganic Chemistry, 2017

A novel room temperature method has been developed which yields, for the first time in literature, uniform and well dispersed CaWO4 nanospindles. This method is based on the use of microemulsions consisting of aqueous solutions of Ca2+ and WO42‐ precursors, cyclohexane as organic medium, triton ...

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Frontispiece: Green Synthesis of A2SiF6 (A=Li–Cs) Nanoparticles using Ionic Liquids as Solvents and as Fluorine Sources: A Simple Approach without HF

07-Sep-2017 | Jacob Olchowka, Markus Suta, Claudia Wickleder, Chemistry - A European Journal, 2017

Fluoridosilicate A2SiF6 (A=Li, Na, K, Rb, Cs) nanoparticles have been prepared, which are promising host lattices for future LEDs. For the preparation, the ionic liquid BmimPF6 is used as a solvent, reactant as well as surfactant, thus avoiding the use of toxic HF or elemental fluorine. For ...

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High photoluminescence quantum yield in organic semiconductor‐perovskite composite thin films

04-Sep-2017 | Giulia Longo, Maria-Grazia La-Placa, Michele Sessolo, Henk J. bolink, ChemSusChem, 2017

One of the obstacles to allow efficient radiative recombination in hybrid perovskites is their low exciton binding energy, typically in the orders of tens of meV. It has been shown that the use of electron‐donor additives can lead to a substantial reduction of the non‐radiative recombination in ...

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Molecular Engineering of Light‐Emitting Diode‐Sensitive D‐π‐A Type Sulfonium Salt Photoacid Generators: Design, Synthesis, and Study of Photochemical and Photophysical Properties

31-Aug-2017 | Xingyu Wu, Ming Jin, Jianchao Xie, Jean-Pierre Malval, Decheng Wan, Chemistry - A European Journal, 2017

A series of D‐π‐A type sulfonium salt photoacid generators (PAGs) were designed and synthesized by systematically changing electron‐pushing groups, π‐conjugated systems, electron‐withdrawing groups, and the number of branches through molecular engineering. These PAGs can effectively decompose ...

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Silyl Glyoxylates as a New Class of High Performance Photoinitiators: Blue LED Induced Polymerization of Methacrylates in Thin and Thick Films

31-Aug-2017 | Mariem Bouzrati-Zerelli; Julie Kirschner; Christoph P. Fik; Maximilian Maier; Celine Dietlin; Fabrice Morlet-Savary; ..., Macromolecules, 2017

Silyl glyoxylates are proposed here as a new class of high performance type I photoinitiators for free radical polymerization under air or in laminate (e.g., (meth)acrylates) upon exposure to different near-UV (at 395 nm; at 405 nm) and blue (at 477 nm) LEDs. The new proposed photoinitiators can ...

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Synthesis, Crystal Structure, and Luminescence Properties of Tunable Red-Emitting Nitride Solid Solutions (Ca1–xSrx)16Si17N34:Eu2+ for White LEDs

28-Aug-2017 | Hang Chen; Jianyan Ding; Xin Ding; Xicheng Wang; Yaxin Cao; Zhengyan Zhao; Yuhua Wang, Inorganic Chemistry, 2017

A series of nitride solid solutions (Ca1–xSrx)16Si17N34:0.03Eu2+ were successfully synthesized through the conventional solid-state method. The electronic crystal structure and photoluminescence characteristics were studied in detail. The excitation in the near-ultraviolet and blue regions of the ...

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Energies, Vol. 10, Pages 1277: The Effect of Imbalanced Carrier Transport on the Efficiency Droop in GaInN-Based Blue and Green Light-Emitting Diodes

27-Aug-2017 | Park, Jun Hyuk ; Cho, Jaehee ; Schubert, E. Fred ; Kim, Jong Kyu, Energies, 2017

Energies, Vol. 10, Pages 1277: The Effect of Imbalanced Carrier Transport on the Efficiency Droop in GaInN-Based Blue and Green Light-Emitting Diodes Energies doi: 10.3390/en10091277 Authors: Jun Hyuk Park Jaehee Cho E. Fred Schubert Jong Kyu Kim The effect of ...

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Molecules, Vol. 22, Pages 1420: An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality

27-Aug-2017 | Hasan, Md. Mohidul ; Bashir, Tufail ; Ghosh, Ritesh ; Lee, Sun Keun ; Bae, Hanhong, Molecules, 2017

Molecules, Vol. 22, Pages 1420: An Overview of LEDs’ Effects on the Production of Bioactive Compounds and Crop Quality Molecules doi: 10.3390/molecules22091420 Authors: Md. Mohidul Hasan Tufail Bashir Ritesh Ghosh Sun Keun Lee Hanhong Bae Light-emitting diodes (LEDs) are ...

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A 340/380 nm light‐emitting diode illuminator for Fura‐2 AM ratiometric Ca2+ imaging of live cells with better than 5 nM precision

24-Aug-2017 | P. W. TINNING, A. J. P.M. FRANSSEN, S. U. HRIDI, T. J. BUSHELL, G. MCCONNELL, Journal of Microscopy, 2017

Summary We report the first demonstration of a fast wavelength‐switchable 340/380 nm light‐emitting diode (LED) illuminator for Fura‐2 ratiometric Ca2+ imaging of live cells. The LEDs closely match the excitation peaks of bound and free Fura‐2 and enables the precise detection of cytosolic ...

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