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437 Newest Publications about the topic leds

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Near-UV and blue wavelength excitable Mg0.6Ca2.16Mo0.2W0.8O6: Eu0.123+/Na0.12+ high efficiency red phosphors

04-Jan-2015 | Author(s): A. Khanna , P.S. Dutta, Journal of Solid State Chemistry, 2015

Publication date: May 2015 Source:Journal of Solid State Chemistry, Volume 225 Author(s): A. Khanna , P.S. Dutta Red phosphors with narrow emission around 615nm (with FWHM~5–10nm) having chemical compositions of A 0.6Ca2.16Mo0.2W0.8O6: Eu0.12 3+/Na0.12 + (A=Mg, Sr) have been found to ...

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White‐Emitting Tuning and Energy Transfer in Eu2+/Mn2+‐Substituted Apatite‐Type Fluorophosphate Phosphors

31-Dec-2014 | Ning Guo, Chengzheng Jia, Jing Li, Yuefeng Zhao, Ruizhuo Ouyang, Wei Lü, Journal of the American Ceramic Society, 2014

Herein, a series of Eu2+&Mn2+substituted fluorophosphates Ca6Gd2Na2(PO4)6F2 phosphor with apatite structure have been synthesized and investigated by the powder X‐ray diffraction, photoluminescence spectra, fluorescence decay curves, thermal quenching, and chromaticity properties. Particularly, ...

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Electroluminescence from colloidal semiconductor CdSe nanoplatelets in hybrid organic–inorganic light emitting diode

21-Dec-2014 | Author(s): A.G. Vitukhnovsky , V.S. Lebedev , A.S. Selyukov , A.A. Vashchenko , R.B. Vasiliev , M.S. Sokolikova, Chemical Physics Letters, 2014

Publication date: 5 January 2015 Source:Chemical Physics Letters, Volume 619 Author(s): A.G. Vitukhnovsky , V.S. Lebedev , A.S. Selyukov , A.A. Vashchenko , R.B. Vasiliev , M.S. Sokolikova We report on the fabrication of a hybrid light-emitting-diode based on colloidal semiconductor ...

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Wirelessly powered ultraviolet light emitting diodes for photocatalytic oxidation

21-Dec-2014 | Author(s): Johannes Kuipers , Harry Bruning , Doekle Yntema , Huub Rijnaarts, Journal of Photochemistry and Photobiology A: Chemistry, 2014

Publication date: 15 February 2015 Source:Journal of Photochemistry and Photobiology A: Chemistry, Volume 299 Author(s): Johannes Kuipers , Harry Bruning , Doekle Yntema , Huub Rijnaarts A method is presented to distribute small scale light sources in a photocatalytic slurry reactor. ...

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IJMS, Vol. 15, Pages 23448-23500: Protecting the Melatonin Rhythm through Circadian Healthy Light Exposure

17-Dec-2014 | Bonmati-Carrion, Maria Angeles; Arguelles-Prieto, Raquel ; Martinez-Madrid, Maria Jose; Reiter, Russel ; Hardeland, ..., International Journal of Molecular Sciences, 2014

Currently, in developed countries, nights are excessively illuminated (light at night), whereas daytime is mainly spent indoors, and thus people are exposed to much lower light intensities than under natural conditions. In spite of the positive impact of artificial light, we pay a price for the ...

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Metal‐Free, Room‐Temperature, Radical Alkoxycarbonylation of Aryldiazonium Salts through Visible‐Light Photoredox Catalysis

10-Dec-2014 | Wei Guo, Liang‐Qiu Lu, Yue Wang, Ya‐Ni Wang, Jia‐Rong Chen, Wen‐Jing Xiao, Angewandte Chemie International Edition, 2014

Abstract The first radical alkoxycarboxylation of aryldiazonium salts using CO gas through visible‐light‐induced photoredox catalysis (16 W blue LEDs) has been developed. This reaction is entirely metal‐free, is carried out at room temperature with a low loading of an organic dye as a ...

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Epitaxial Growth of Three-Dimensionally Mesostructured Single-Crystalline Cu2O via Templated Electrodeposition

10-Dec-2014 | Jinwoo Kim; Ha Seong Kim; Jun Hee Choi; Hyeongtag Jeon; Yohan Yoon; Jinyun Liu; Jea-Gun Park; Paul V. Braun, Chemistry of Materials, 2014

Significant efforts have been made over the past few decades to realize functional three-dimensional photonic crystal devices including zero-threshold lasers, waveguides, light-emitting diodes (LEDs), and solar cells; however, progress has been limited because of difficulties in creating ...

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Materials, Vol. 7, Pages 7781-7798: Effect of Temperature on the Growth of Silver Nanoparticles Using Plasmon-Mediated Method under the Irradiation of Green LEDs

05-Dec-2014 | Lee, Shan-Wei ; Chang, Shi-Hise ; Lai, Yen-Shang ; Lin, Chang-Cheng ; Tsai, Chin-Min ; Lee, Yao-Chang ; Chen, Jui-Ch ..., Materials, 2014

Plasmon-mediated shape conversion of spherical silver nanoparticles (NPs) to nanostructures with other shapes under the irradiation of green LEDs (520 ± 20 nm, 35 mw/cm2) at various temperatures (60, 40, 20, 10, 5, and 0 °C) was performed in this study. It was found that the bath temperature ...

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Materials, Vol. 7, Pages 7828-7842: Combustion Synthesis and Photoluminescence Properties of Red-Emitting CaAlSiN3:Eu2+ Phosphor for White-LEDs

05-Dec-2014 | Chung, Shyan-Lung ; Huang, Shu-Chi, Materials, 2014

A combustion synthesis method has been developed for synthesis of Eu2+ doped CaAlSiN3 phosphor and its photoluminescence properties were investigated. Ca, Al, Si, and Eu2O3 powders were used as the Ca, Al, Si and Eu sources. The addition of NaN3, NH4Cl and Si3N4 powders was found to increase ...

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A single-phased tunable emission phosphor MgY2Si3O10: Eu3+, Bi3+ with efficient energy transfer for white LEDs

26-Nov-2014 | Hongpeng Zhou; Ye Jin; Mingsong Jiang; Qingping Wang; Xingxing Jiang, Dalton Transactions, 2014

A novel single-phased tunable emitting phosphor MgY2Si3O10: Bi3+, Eu3+ has been synthesized by a conventional high temperature solid-state method. X-ray diffraction (XRD), photoluminescence emission and excitation spectra were utilized to characterize the as-synthesized samples. Under UV-light ...

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