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660 Newest Publications about the topic leds

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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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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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Water‐Dispersible Fluorescent Silicon Nanoparticles and their Optical Applications

16-Aug-2016 | Yuanyuan Su, Xiaoyuan Ji, Yao He, Advanced Materials, 2016

Fluorescent silicon nanoparticles (SiNPs) attract considerable attention owing to their intrinsic advantages, including relatively strong fluorescence coupled with robust photostability, rich resource support and relatively low cost, industrial maturity, and good biocompatibility. Extensive ...

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Orange light‐emitting Ca3Mg3(PO4)4:Sm3+ phosphors

16-Aug-2016 | Govind B. Nair, S. J. Dhoble, Luminescence, 2016

Abstract This work reports the photoluminescence properties of Ca3Mg3(PO4)4:Sm3+ phosphors that were synthesized by the combustion method. The phase formation and morphology of the prepared phosphors were analysed by X‐ray diffraction studies and scanning electron microscopy. Ca3Mg3(PO4)4:Sm3+ ...

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NiOx Electrode Interlayer and CH3NH2/CH3NH3PbBr3 Interface Treatment to Markedly Advance Hybrid Perovskite‐Based Light‐Emitting Diodes

12-Aug-2016 | Yi‐Kai Chih, Jian‐Chih Wang, Rei‐Ting Yang, Chi‐Ching Liu, Yun‐Chorng Chang, Yaw‐Shyan Fu, Wei‐Chi Lai, Peter Chen, ..., Advanced Materials, 2016

The performance of hybrid perovskive‐based light‐emitting diodes (LEDs) is markedly enhanced by the application of an NiOx electrode interlayer and moderate methylamine treatment. A hybrid perovskite‐based LED exhibits a peak luminous efficiency of 15.9 cd A−1 biased at 8.5 V, 407.65 mA cm−2, ...

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Eu2+-Activated Phase-Pure Oxonitridosilicate Phosphor in a Ba–Si–O–N System via Facile Silicate-Assisted Routes Designed by First-Principles Thermodynamic Simulation

12-Aug-2016 | Young Jun Yun; Jin Kyu Kim; Ji Young Ju; Seul Ki Choi; Woon Ik Park; Ha-kyun Jung; Yongseon Kim; Sungho Choi, Inorganic Chemistry, 2016

Eu2+-activated single phase Ba2+-oxonitridosilicate phosphors were prepared under a mild synthetic condition via silicate precursors, and their luminescent properties were investigated. Both the preferred oxonitridosilicate formation as for the available host compounds and thermodynamic stability ...

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Origin and Luminescence of Anomalous Red-Emitting Center in Rhombohedral Ba9Lu2Si6O24:Eu2+ Blue Phosphor

11-Aug-2016 | Yongfu Liu; Changhua Zhang; Zhixuan Cheng; Zhi Zhou; Jun Jiang; Haochuan Jiang, Inorganic Chemistry, 2016

We obtain a blue phosphor, Ba9Lu2Si6O24:Eu2+ (BLS:Eu2+), which shows a strong emission peak at 460 nm and a weak tail from 460 to 750 nm. A 610 nm red emission is observed for the first time in this kind of rhombohedral structure material, which is much different from the same crystal structure ...

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Sensors, Vol. 16, Pages 1254: Reversed Three-Dimensional Visible Light Indoor Positioning Utilizing Annular Receivers with Multi-Photodiodes

08-Aug-2016 | Xu, Yinfan ; Zhao, Jiaqi ; Shi, Jianyang ; Chi, Nan, Sensors, 2016

Exploiting the increasingly wide use of light emitting diodes (LEDs) lighting, in this paper we propose a reversed indoor positioning system (IPS) based on LED visible light communication (VLC) in order to improve indoor positioning accuracy. Unlike other VLC positioning systems, we employ two ...

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Eu2+-Activated Alkaline-Earth Halophosphates, M5(PO4)3X:Eu2+ (M = Ca, Sr, Ba; X = F, Cl, Br) for NUV-LEDs: Site-Selective Crystal Field Effect

05-Aug-2016 | Donghyeon Kim; Sung-Chul Kim; Jong-Seong Bae; Sungyun Kim; Seung-Joo Kim; Jung-Chul Park, Inorganic Chemistry, 2016

Eu2+-activated M5(PO4)3X (M = Ca, Sr, Ba; X = F, Cl, Br) compounds providing different alkaline-earth metal and halide ions were successfully synthesized and characterized. The emission peak maxima of the M5(PO4)3Cl:Eu2+ (M = Ca, Sr, Ba) compounds were blue-shifted from Ca to Ba (454 nm for Ca, ...

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AlN growth on nano‐patterned sapphire: A route for cost efficient pseudo substrates for deep UV LEDs

01-Aug-2016 | Sylvia Hagedorn, Arne Knauer, Anna Mogilatenko, Eberhard Richter, Markus Weyers, physica status solidi (a), 2016

C‐plane‐oriented sapphire substrates that were patterned on the nanoscale were overgrown by AlN using metal‐organic vapor phase epitaxy. The occurrence of undesired misaligned AlN growth was detected. We found that this misaligned growth can be overcome by a proper choice of growth temperature ...

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