Results 11 to 20 of about 78,935 (310)

The modeling of LED's disposition

Lietuvos Matematikos Rinkinys, 2004
The goal of this work is to construct the scheme of constructing light  – emitting diodes system. The mathematical model was written for a light-emitting diodes lamp. The finite difference technique was used for the discretization of mathematical model.
Jurgita Dabulytė, Feliksas Ivanauskas , Artūras Žukauskas   +2 more
doaj   +3 more sources

Light-emitting electrochemical cells and solution-processed organic light-emitting diodes using small molecule organic thermally activated delayed fluorescence emitters [PDF]

, 2015
EZ-C thanks the University of St Andrews for support. The authors are grateful to the EPSRC for financial support (grants EP/J01771X and EP/J00916). IDWS is a Royal Society Wolfson Research Merit Award Holder.Two novel charged organic thermally activated
Samuel, Ifor David William, Hedley, Gordon James, Hedley, Gordon J., Antonio Pertegás, Eli Zysman-Colman (1366824), Michael Y. Wong, Ifor D. W. Samuel (1362714), Lisa S. Kölln (1366821), Kolln, Lisa, Zysman-Colman, Eli, Henk J. Bolink (1365726), Guohua Xie, Lisa S. Kölln, Xie, Guohua, Samuel, Ifor D. W., Guohua Xie (535825), Pertegás, Antonio, Ifor D. W. Samuel, Gordon J. Hedley, Gordon J. Hedley (1366815), Wong, Michael Y., Bolink, Henk J., Michael Y. Wong (1366827), Kölln, Lisa S., Antonio Pertegás (1366818), Henk J. Bolink, Eli Zysman-Colman   +26 more
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The effect of using light emitting diodes and fluorescent lamps as different light sources in growth inhibition tests of green alga, diatom, and cyanobacteria.

PLoS ONE, 2021
Aquatic organisms have been used to investigate the safety of chemicals worldwide. One such assessment is an algal growth inhibition test. Algal growth inhibition tests are commonly performed using a growth chamber with fluorescent lamps as the lighting ...
Akira Okamoto, Miyuki Imamura, Kazune Tani, Takeru Matsumoto   +3 more
doaj   +1 more source

Highly luminescent colloidal CdS quantum dots with efficient near-infrared electroluminescence in light-emitting diodes [PDF]

, 2016
We acknowledge financial support from FP7 project “Laser Induced Synthesis of Polymeric Nanocomposite Materials and Development of Micro-Patterned Hybrid Light Emitting Diodes (LED) and Transistors (LET)”-LAMP (Project G.A.247928). A.K.B.
Zhang, S., LANZI, MASSIMILIANO, Samuel, I. D. W., Antolini, F, Lanzi, M, Samuel, Ifor David William, Bansal, Ashu Kumar, Orlotani, L, Serra, E., Bansal, A. K., ANTOLINI, FRANCESCO, Serra, E, STROEA, LENUTA, Allard, S, Stroea, L, ORTOLANI, LUCA, Scherf, U, Zhang, Shuyu, Scherf, U., Allard, S.   +19 more
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STUDY OF MECHANISMS RESPONSIBLE FOR THE EFFICIENCY DEGRADATION OF THE III-NITRIDES LIGHT EMITTING DIODES [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2015
The results for external quantum efficiency degradation of two types of light emitting diodes based on III-nitrides: blue and ultraviolet ones are presented. Existing mechanisms proposed for the degradation are considered briefly.
N. M. Shmidt, A. S. Usikov, E. I. Shabunina, A. E. Chernyakov, S. Y. Kurin, Y. N. Makarov, H. I. Helava, B. P. Papchenko   +7 more
doaj   +1 more source

Red GaPAs/GaP Nanowire-Based Flexible Light-Emitting Diodes

Nanomaterials, 2021
We demonstrate flexible red light-emitting diodes based on axial GaPAs/GaP heterostructured nanowires embedded in polydimethylsiloxane membranes with transparent electrodes involving single-walled carbon nanotubes.
Vladimir Neplokh, Vladimir Fedorov, Alexey Mozharov, Fedor Kochetkov, Konstantin Shugurov, Eduard Moiseev, Nuño Amador-Mendez, Tatiana Statsenko, Sofia Morozova, Dmitry Krasnikov, Albert G. Nasibulin, Regina Islamova, George Cirlin, Maria Tchernycheva, Ivan Mukhin   +14 more
doaj   +1 more source

Absorbance based light emitting diode optical sensors and sensing devices [PDF]

, 2008
The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of ...
O'Toole, Martina, Dermot Diamond, O\u27Toole, Martina, Martina O’Toole, Diamond, Dermot, Martina O’Toole   +5 more
core   +1 more source

Efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes with nonuniform current spreading [PDF]

, 2011
We demonstrate that the efficiency droop phenomenon in multiple quantum well InGaN/GaN light-emitting diodes (LEDs) may be connected to the current crowding effect.
Kudryk Y. Y., A V Zinovchuk, Zinovchuk A. V., Ya Ya Kudryk   +3 more
core   +1 more source

Mixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes

Nature Communications, 2021
Achieving bright and efficient blue emission in metal halide perovskite light-emitting diodes has proven to be challenging. Here, the authors demonstrate high EQE and spectrally stable blue light-emitting diodes based on mixed halide perovskites, with ...
Max Karlsson, Ziyue Yi, Sebastian Reichert, Xiyu Luo, Weihua Lin, Zeyu Zhang, Chunxiong Bao, Rui Zhang, Sai Bai, Guanhaojie Zheng, Pengpeng Teng, Lian Duan, Yue Lu, Kaibo Zheng, Tönu Pullerits, Carsten Deibel, Weidong Xu, Richard Friend, Feng Gao   +18 more
doaj   +1 more source

Beam divergence measurements of InGaN/GaN micro-array light-emitting diodes using confocal microscopy [PDF]

, 2005
The recent development of high-density, two-dimensional arrays of micrometer-sized InGaN/GaN light-emitting diodes (micro-LEDs) with potential applications from scientific instrumentation to microdisplays has created an urgent need for controlled ...
Choi, H.W., McConnell, G., McConnell, G, Gu, E., Jeon, C.W., Dawson, M.D., Griffin, C., Dawson, MD, Girkin, JM, Jeon, CW, Griffin, C, Girkin, J.M., Gu, E, Choi, HW   +13 more
core   +1 more source