Results 221 to 230 of about 1,228,728 (251)

Design of a Current-Source-Output Inductive Power Transfer LED Lighting System

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2015
Inductive power transfer (IPT) light-emitting diode (LED) lighting systems have many advantages in commercial, industrial, and domestic applications. Due to the large leakage inductance, primary and secondary capacitor compensations are necessary to improve the power transfer capability. To offer a direct current source output for LED driving, topology
null Xiaohui Qu, null Wei Zhang, null Siu-Chung Wong, Chi K. Tse   +3 more
openaire   +1 more source

Junction geometries to improve power output of incoherent light from GaAs diodes

1963 International Electron Devices Meeting, 1963
Incoherent radiation is usually observed emanating from the p or n region of a wafer containing a p-n junction. In the region in which the radiative recombination occurs, the P/I ratio is 1.5 watts per ampere at 77° K for unity quantum efficiency. The ratio of the maximum power which may exit either the p or n surface to that generated within the ...
R.B. Liebert, B.V. Keshavan, M.F. Lamorte, L.J. West   +3 more
openaire   +1 more source

Improved light output power in GaN-based vertical light-emitting diodes with p-AlInGaN/GaN superlattices

Journal of the Korean Physical Society, 2012
In this paper, we report the effect of p-type AlGaInN/GaN superlattices (SLs) as electron-blocking layers (EBLs) on the optical properties of vertical light-emitting diodes (VLEDs). Using p-AlGaInN/GaN SLs in VLEDs, we have achieved significant improvements in the output power and the external quantum efficiency (EQE) as compared to VLEDs using p ...
Su Jin Kim, Sung Hun Son, Tae Geun Kim
openaire   +1 more source

Improved Light Output Power of GaN-Based Light-Emitting Diodes Using Double Photonic Quasi-Crystal Patterns

IEEE Electron Device Letters, 2009
The enhancement of light extraction from GaN-based light-emitting diodes (LEDs) with a double 12-fold photonic quasi-crystal (PQC) structure using nanoimprint lithography is presented. At a driving current of 20 mA on a transistor-outline-can package, the light output power of an LED with a nanohole patterned sapphire substrate (NHPSS) and an LED with ...
null Hung-Wen Huang, null Chung-Hsiang Lin, null Zhi-Kai Huang, null Kang-Yuan Lee, null Chang-Chin Yu, null Hao-Chung Kuo   +5 more
openaire   +1 more source

Light Output Power Enhancement of GaN-based Vertical Light Emitting Diodes via Fabricating Surface Nanorod Arrays

ECS Meeting Abstracts, 2008
Abstract not Available.
ChingHua Chiu, H. C. Kuo, T.C. Lu, S.C. Wang, C.S. Hsiao, S.Y. Chen   +5 more
openaire   +1 more source

Planning for post‐pandemic cancer care delivery: Recovery or opportunity for redesign?

Ca-A Cancer Journal for Clinicians, 2021
Pelin Cinar, Daniela A Bota, Kathryn A Gold   +2 more
exaly  

Outdoor air pollution and cancer: An overview of the current evidence and public health recommendations

Ca-A Cancer Journal for Clinicians, 2020
Michelle C Turner, Zorana Jovanovic Andersen, Andrea A Baccarelli   +2 more
exaly  

Flexible self-charging power sources

Nature Reviews Materials, 2022
Ruiyuan Liu, Zhong Lin Wang, Kenjiro Fukuda   +2 more
exaly  

Soil microbiomes and one health

Nature Reviews Microbiology, 2022
Marcel G A Van Der Heijden
exaly  

A roadmap for the commercialization of perovskite light emitters

Nature Reviews Materials, 2022
, Richard Friend, Edward H Sargent
exaly