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680 Newest Publications about the topic leds


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Bacteria Inactivation via X-ray-Induced UVC Radioluminescence: Toward in Situ Biofouling Prevention in Membrane Modules

21-Oct-2016 | Timothy A. Johnson; Elisa A. Rehak; Sushant P. Sahu; David A. Ladner; Ezra L. Cates, Environmental Science & Technology, 2016

Germicidal UVC radiation is a highly effective, chemical-free tool for bacteria inactivation, but its application is limited to reactors and open areas that can accommodate lamps/LEDs and wiring. A relevant example of problematic bacterial colonization within UV-inaccessible confines where ...


Narrow-Band Red Emitting Phosphor BaTiF6:Mn4+: Preparation, Characterization and Application for Warm White LED Devices

18-Oct-2016 | Xiaoli Gao; Yan Song; Gui-Xia Liu; Xiang Ting Dong; Jinxian Wang; Wen Sheng Yu, Dalton Transactions, 2016

As a new class of non-rare-earth red phosphor for high-efficiency warm white light-emitting diodes (white LEDs), Mn4+ ions activated fluoride compounds have been extensively investigated recently and hold the potential to supersede the commercial rare earth doped nitride phosphors. Herein, a ...


C–H Xanthylation: A Synthetic Platform for Alkane Functionalization

14-Oct-2016 | William L. Czaplyski; Christina G. Na; Erik J. Alexanian, Journal of the American Chemical Society, 2016

Intermolecular functionalizations of aliphatic C–H bonds offer unique strategies for the synthesis and late-stage derivatization of complex molecules, but the chemical space accessible remains limited. Herein, we report a transformation significantly expanding the chemotypes accessible via C–H ...


Influence of irradiation by 60Co gamma‐quanta on reliability of IR‐LEDs based upon AlGaAs heterostructures

06-Oct-2016 | Alexander V. Gradoboev, Anastasiia V. Simonova, Ksenia N. Orlova, physica status solidi (c), 2016

Abstract We consider the influence of preliminary irradiation by 60Co gamma quanta on emission power decrease during the operating time of IR‐LEDs based upon AlGaAs double heterostructures. Irradiation was realized in passive power mode of the LEDs prior to aging. Aging under long operating ...


Efficient Blue Electroluminescence Using Quantum-Confined Two-Dimensional Perovskites

03-Oct-2016 | Sudhir Kumar; Jakub Jagielski; Sergii Yakunin; Peter Rice; Yu-Cheng Chiu; Mingchao Wang; Georgian Nedelcu; Yeongin K ..., ACS Nano, 2016

Solution-processed hybrid organic–inorganic lead halide perovskites are emerging as one of the most promising candidates for low-cost light-emitting diodes (LEDs). However, due to a small exciton binding energy, it is not yet possible to achieve an efficient electroluminescence within the blue ...


Efficient and Stable White LEDs with Silica‐Coated Inorganic Perovskite Quantum Dots

26-Sep-2016 | Chun Sun, Yu Zhang, Cheng Ruan, Chunyang Yin, Xiaoyong Wang, Yiding Wang, William W. Yu, Advanced Materials, 2016

A white light‐emitting diode (0.33, 0.33) is fabricated using perovskite quantum dot/silica composites. It is shown to have greatly improved stability.


Visible‐Light‐Promoted Metal‐free Aerobic Oxidation of Primary Amines to Acids and Lactones

26-Sep-2016 | Xiaokai Cheng, Bo Yang, Xingen Hu, Qing Xu, Zhan Lu, Chemistry - A European Journal, 2016

A unique metal‐free aerobic oxidation of primary amines via visible light photocatalytic double carbon‐carbon bonds cleavage and multi carbon‐hydrogen bonds oxidation was observed. Aerobic oxidation of primary amines could be controlled to afford acids by using dioxane with 18W CFL, and lactones ...


Direct growth of thick AlN layers on nanopatterned Si substrates by cantilever epitaxy

26-Sep-2016 | İlkay Demir, Yoann Robin, Ryan McClintock, Sezai Elagoz, Konstantinos Zekentes, Manijeh Razeghi, physica status solidi (a), 2016

AlN layers have been grown on 200 nm period of nanopatterned Si (111) substrates by cantilever epitaxy and compared with AlN layers grown by maskless lateral epitaxial overgrowth (LEO) on micropatterned Si (111) substrates. The material quality of 5–10 µm thick AlN grown by LEO is comparable to ...


Performance of a New 235 nm UV-LED-Based On-Capillary Photometric Detector

26-Sep-2016 | Yan Li; Pavel N. Nesterenko; Brett Paull; Roger Stanley; Mirek Macka, Analytical Chemistry, 2016

In this work, for the first time, a sub-250 nm light-emitting diode (LED) is investigated as a light source for optical detection in chemical analysis. A 235 nm deep ultraviolet-light-emitting diode (UV-LED) is employed within an on-capillary photometric detector and applied in capillary ...


IJERPH, Vol. 13, Pages 940: Time Effectiveness of Ultraviolet C Light (UVC) Emitted by Light Emitting Diodes (LEDs) in Reducing Stethoscope Contamination

23-Sep-2016 | Messina, Gabriele ; Fattorini, Mattia ; Nante, Nicola ; Rosadini, Daniele ; Serafini, Andrea ; Tani, Marco ; Cevenin ..., International Journal of Environmental Research and Public Health, 2016

Today it is well demonstrated that stethoscopes can be as contaminated as hands, which are a recognized source of Health-Care Associated Infections (HCAIs). Ultraviolet C (UVC) light has proven disinfection capacity and the innovative UVC technology of Light Emitting Diode (LED) shows several ...


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