scholarly journals Illuminating the future with LEDs

2015 ◽  
pp. 188-192
Author(s):  
Silvino Jose Antuña Presa
Keyword(s):  
Energy Saving ◽  
Mobile Phones ◽  
Light Emitting Diodes ◽  
Street Lighting ◽  
Light Emitting ◽  
Blue Led ◽  
The Future ◽  
New Energy ◽  
Good For ◽  
At Home

Light-emitting diodes also known as LEDs are all around us: they are used in TVs, computers, mobile phones, street lighting and even in our homes in the form of new energy saving and long lifespan lamps. Now you might be wondering: “why all the fuss? Is this another ‘new thing’ that is going to disappear in a couple of years or is this something that is going to stay?” Well, to the truth, LEDs have been around for some time: they were initially used as small indicator lamps and for small displays; in fact, almost any appliance you may have at home will have a small LED lamp to tell you whether it is on or off. Things started to change when the first blue LED was demonstrated in 1994. Before this achievement the only available colours for LEDs with decent efficiency were red and orange-red. This was good for ...

Implementation of LED Lighting Powered by Solar Energy for Bicycles

2021 ◽  
Vol 8 (5) ◽  
pp. 96-101
Author(s):  
Wen-Bin Lin ◽  
Kao-Feng Yarn
Keyword(s):  
Energy Saving ◽  
Environmental Protection ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Solar Photovoltaic ◽  
Light Emitting ◽  
Led Lighting ◽  
White Leds ◽  
The Future ◽  
Long Life

The high efficiency, simple driving, environmental protection and long life of high power white-light diodes have attracted a lot of attention from industry and academia. High-efficiency white LEDs have the potential to replace traditional lighting such as incandescent bulbs and fluorescent lamps, and can be used in residential environments, industry and commercial advertising. Because of the advantages of light-emitting diodes, such as power saving, environmental protection, long life and fast response time, they will replace traditional light-emitting elements as the new lighting source in the future. Under the restrictions and regulations of the Kyoto Protocol, we will cooperate with the country to actively promote energy-saving technology and energy industry in the future. This paper proposes the development of LED lighting and photovoltaic, and the application of solar photovoltaic systems to bicycles, in line with the green technology industry LED lighting and solar photovoltaic industry development. Energy-saving LEDs can be combined with stand-alone lighting systems to enable the sustainable development of renewable energy development and energy conservation policies in Taiwan. Keywords: Solar cells, Light-emitting diodes, LED lamp drivers, White LEDs.

scholarly journals Air stable and highly efficient Bi3+-doped Cs2SnCl6 for blue light-emitting diodes

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26415-26420
Author(s):  
Yue Yao ◽  
Si-Wei Zhang ◽  
Zijian Liu ◽  
Chun-Yun Wang ◽  
Ping Liu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Coordinates ◽  
Blue Led ◽  
Highly Efficient ◽  
Photoluminescence Quantum Yield ◽  
Long Life

A Bi3+-doped Cs2SnCl6 exhibits photoluminescence at around 456 nm and a photoluminescence quantum yield of 31%. The blue LED based on the Bi3+-doped Cs2SnCl6 phosphor exhibits a long life of 120 hours and a CIE color coordinates of (0.14, 0.11).

Energy Saving Potential of Dynamic Lighting Control in Street Lighting Systems in Libya

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Salah M Alabani
Keyword(s):  
Total Energy ◽  
Energy Saving ◽  
Light Emitting Diode ◽  
Street Lighting ◽  
Light Emitting ◽  
Energy Saving Potential ◽  
Road Section ◽  
First Case ◽  
Lighting Systems ◽  
Dynamic Lighting

This paper studies the manner of energy consumption in Libyan street lighting systems and general road section. It also suggests proposal system with two cases of operation for an attempt to apply the energy saving program by adopting an optimum method in order to decrease the demand of energy in this section and to reduce the use of uneconomic equipment.The proposal system in this paper introduces the Light Emitting Diode (LED) street lighting technology to be used instead of traditional luminaries High Pressure Sodium (HPS). The proposed system is divided into two cases. The first case discusses the replacement of traditional luminaries (HPS) with energy saving luminaries (LED), while second case explains how integrating control node (dynamic dimmer) into LED in order to dim output lighting in streets will save more energy.This study reaches a result that a significant amount of energy of %47 (about 1092.23 GWh/year) of total energy consumed in street lighting sector could be saved if first case is applied. Moreover, it suggests that more energy of %58 (about 1380.02 GWh/year) of total energy consumed in the same sector cloud be saved if the second case is adopted.

A replacement for incandescent bulbs: high-efficiency blue-hazard free organic light-emitting diodes

2017 ◽  
Vol 5 (1) ◽  
pp. 176-182 ◽  
Author(s):  
J. H. Jou ◽  
H. H. Yu ◽  
F. C. Tung ◽  
C. H. Chiang ◽  
Z. K. He ◽  
...  
Keyword(s):  
Energy Saving ◽  
Light Source ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

A blue-hazard free, healthy light source will become the mainstream of future lighting wherein higher energy saving is always a must.

scholarly journals Energy-saving quality road lighting with colloidal quantum dot nanophosphors

Nanophotonics ◽  
2014 ◽  
Vol 3 (6) ◽  
pp. 373-381 ◽  
Author(s):  
Talha Erdem ◽  
Yusuf Kelestemur ◽  
Zeliha Soran-Erdem ◽  
Yun Ji ◽  
Hilmi Volkan Demir
Keyword(s):  
Energy Saving ◽  
Light Sources ◽  
Experimental Proof ◽  
Street Lighting ◽  
Light Emitting ◽  
The Road ◽  
Road Lighting ◽  
The Usa ◽  
The Uk ◽  
Conversion Efficiencies

AbstractHere the first photometric study of road-lighting white light-emitting diodes (WLEDs) integrated with semiconductor colloidal quantum dots (QDs) is reported enabling higher luminance than conventional light sources, specifically in mesopic vision regimes essential to street lighting. Investigating over 100 million designs uncovers that quality road-lighting QD-WLEDs, with a color quality scale and color rendering index ≥85, enables 13–35% higher mesopic luminance than the sources commonly used in street lighting. Furthermore, these QD-WLEDs were shown to be electrically more efficient than conventional sources with power conversion efficiencies ≥16–29%. Considering this fact, an experimental proof-of-concept QD-WLED was demonstrated, which is the first account of QD based color conversion custom designed for street lighting applications. The obtained white LED achieved the targeted mesopic luminance levels in accordance with the road lighting standards of the USA and the UK. These results indicate that road-lighting QD-WLEDs are strongly promising for energy-saving quality road lighting.

Synthesis and Application of Electronic Transporting Materials

2011 ◽  
Vol 687 ◽  
pp. 179-182
Author(s):  
Ting Xi Li ◽  
Su Su Gao ◽  
Peng Sui ◽  
Na Kong ◽  
Sha Sha Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Saving ◽  
Environmental Protection ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Lighting Technology ◽  
Organic Light ◽  
Electron Transporting Layer

Novel pyridine-containing compounds were synthesized and their properties were studied. Organic EL devices using these compounds as electron-transporting layer were fabricated. It is demonstrated that these compounds are useful for organic light-emitting diodes (OLED) and solid state lighting technology in favor of energy-saving and environmental protection fields.

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