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669 Newest Publications about the topic leds

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Iron‐Based Metal‐Organic Frameworks (MOF) as Photocatalysts for Radical and Cationic Polymerizations under Near UV and Visible LEDs (385–405 nm)

12-Sep-2016 | Jing Zhang, Frederic Dumur, Patricia Horcajada, Carine Livage, Pu Xiao, Jean Pierre Fouassier, Didier Gigmes, Jacque ..., Macromolecular Chemistry and Physics, 2016

Photoinitiating systems consisting of a highly porous iron(III)‐based metal‐organic framework (MOF), an iodonium salt, and N‐vinylcarbazole are developed to initiate the free radical promoted cationic polymerization of epoxides under air and the free radical polymerization of acrylates in ...

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Ultraviolet Photodissociation Induced by Light‐Emitting Diodes in a Planar Ion Trap

08-Sep-2016 | Dustin D. Holden, Alexander Makarov, Jae C. Schwartz, James D. Sanders, Eugene Zhuk, Jennifer S. Brodbelt, Angewandte Chemie International Edition, 2016

Abstract The first application of light‐emitting diodes (LEDs) for ultraviolet photodissociation (UVPD) mass spectrometry is reported. LEDs provide a compact, low cost light source and have been incorporated directly into the trapping cell of an Orbitrap mass spectrometer. MS/MS efficiencies ...

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Inorganic–organic hybrid white light phosphors

08-Sep-2016 | Ming-Sheng Wang; Guo-Cong Guo, Chemical Communication, 2016

Light-emitting diodes (LEDs) and organic light-emitting diodes (OLEDs) have brought a revolutionary in lighting and display. A very hot field in recent years is to develop white light phosphors, aiming to achieve better color stability, better reproducibility, and simpler fabrication process for ...

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Visible light dye-photosensitised oxidation of pyrroles using a simple LED photoreactor

08-Sep-2016 | James K. Howard; Kieran J. Rihak; Christopher J. T. Hyland; Alex C. Bissember; Jason A. Smith, Organic & Biomolecular Chemistry, 2016

The photooxidation of pyrrole is typically low yielding due to the absorbance of ultraviolet light, which leads to uncontrolled polymerisation and decomposition. Presented herein is the development of a simple and cost-effective photoreactor utilising Light Emitting Diodes (LEDs) as the light ...

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A New Highly Efficient Amine-Free and Peroxide-Free Redox System for Free Radical Polymerization under Air with Possible Light Activation

01-Sep-2016 | P. Garra; F. Dumur; F. Morlet-Savary; C. Dietlin; J. P. Fouassier; J. Lalevée, Macromolecules, 2016

Efficient redox initiating systems for radical polymerizations under air usually show some severe drawbacks such as handling and toxicity of the oxidizing agent (peroxides, persulfates, peroxidiphosphates, disulfides, etc.), toxicity of the reducing agent (aromatic amines such as ...

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Electrically Driven White Light Emission from Intrinsic Metal–Organic Framework

31-Aug-2016 | Golam Haider; Muhammad Usman; Tzu-Pei Chen; Packiyaraj Perumal; Kuang-Lieh Lu; Yang-Fang Chen, ACS Nano, 2016

Light-emitting diodes (LEDs) have drawn tremendous potential as a replacement of traditional lighting due to its low-power consumption and longer lifetime. Nowadays, the practical white LEDs (WLED) are contingent on the photon down-conversion of phosphors containing rare-earth elements, which ...

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CdS@SiO2 Core–Shell Electroluminescent Nanorod Arrays Based on a Metal–Insulator–Semiconductor Structure

30-Aug-2016 | Chunfeng Wang, Dengfeng Peng, Jing Zhao, Rongrong Bao, Tianfeng Li, Li Tian, Lin Dong, Changyu Shen, Caofeng Pan, Small, 2016

Enormous advancement has been achieved in the field of one‐dimensional (1D) semiconductor light‐emitting devices (LEDs), however, LEDs based on 1D CdS nanostructures have been rarely reported. The fabrication of CdS@SiO2 core–shell nanorod array LEDs based on a Au–SiO2–CdS ...

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Gold-catalysed cross-coupling between aryldiazonium salts and arylboronic acids: probing the usefulness of photoredox conditions

20-Aug-2016 | Thomas Cornilleau; Philippe Hermange; Eric Fouquet, Chemical Communication, 2016

The synthesis of biaryl compounds from aryldiazonium salts and arylboronic acids was achieved using PPh3AuCl as catalyst, CsF as base and acetonitrile as solvent. Combined to photosensitizers, irradiation by blue LEDs allowed accelerating the reaction and expanding its scope. Various functional ...

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Hybrid perovskite as substituent of indium and gallium in light emitting diodes

19-Aug-2016 | Alessandro Lorenzo Palma, Lucio Cinà, Yan Busby, Andrea Marsella, Antonio Agresti, Sara Pescetelli, Jean‐Jacques Pir ..., physica status solidi (c), 2016

Abstract Solution‐processed hybrid bromide perovskite light‐emitting‐diodes (PLEDs) represent an attractive alternative to the conventional critical raw materials (CRMs) based green LEDs. In this work, we report the development and characterization of PLEDs fabricated using a mesostructured ...

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In situ investigation of energy transfer in hybrid organic/colloidal quantum dot light-emitting diodes via magneto-electroluminescence

19-Aug-2016 | Lixiang Chen; Qiusong Chen; Yanlian Lei; Weiyao Jia; De Yuan; Zuhong Xiong, Physical Chemistry Chemical Physics, 2016

Energy transfer (ET) and charge injection (CI) in the hybrid organic/colloidal quantum dot light-emitting diodes (QD-LEDs) have been investigated by using magneto-electroluminescence (MEL) as an in situ tool. The feasibility and availability of MEL as an in situ tool were systematically ...

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