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.

Three-dimensional GaN dodecagonal ring structures for highly efficient phosphor-free warm white light-emitting diodes

Nanoscale ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 4686-4695 ◽  
Author(s):  
Young Chul Sim ◽  
Seung-Hyuk Lim ◽  
Yang-Seok Yoo ◽  
Min-Ho Jang ◽  
Sunghan Choi ◽  
...  
Keyword(s):  
White Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Light Emitting ◽  
White Leds ◽  
Highly Efficient ◽  
Warm White Light ◽  
Ring Structures ◽  
White Light Emitting Diodes

Multifaceted dodecagonal ring structures emit light of various colours with high efficiency and are demonstrated to be phosphor-free white LEDs.

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.

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.

Approaches for fabricating high efficiency organic light emitting diodes

2015 ◽  
Vol 3 (13) ◽  
pp. 2974-3002 ◽  
Author(s):  
Jwo-Huei Jou ◽  
Sudhir Kumar ◽  
Abhishek Agrawal ◽  
Tsung-Han Li ◽  
Snehashis Sahoo
Keyword(s):  
Energy Saving ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Materials ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Highly efficient OLEDs are extremely demanded for the design of highly competitive energy-saving displays and lightings. In this article, we have systematically reviewed some most effective organic materials, eleven device architectural approaches, and outcoupling techniques to realize the high efficiency OLEDs.

scholarly journals An Emerging White LED Technology and associated Thermal Issues – A Review

2019 ◽  
pp. 106-120
Keyword(s):  
High Efficiency ◽  
Heat Sinks ◽  
Light Sources ◽  
White Led ◽  
Color Gamut ◽  
Light Emitting ◽  
White Leds ◽  
Long Life ◽  
White Light Emitting Diodes ◽  
Color Rendering

White light emitting diodes (white-LEDs) are the promising light sources of new lighting technology due to their high efficiency, energy saving, long life and environmentally friendly. In this review, different techniques proposed for the development of white-LEDs have been discussed in terms of their performance efficiency and potential usage. The Phosphor based white-LEDs are widely used LEDs, as compared to RGB based white-LEDs, due to their luminous efficacy, service life, display color gamut and the color rendering. Furthermore, thermal issues related to high power white-LEDs have been discussed as it greatly impacts the performance efficiency. To resolve thermal issues, heat sinks having high thermal conductivity are most widely used among others.

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 ...

The Optical Properties of Dual-Wavelength InxGa1−xN/GaN Nanorods for Wide-Spectrum Light-Emitting Diodes

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Jie Zhao ◽  
Xuecheng Wei ◽  
Dongdong Liang ◽  
Qiang Hu ◽  
Jianchang Yan ◽  
...  
Keyword(s):  
Stark Effect ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Wide Spectrum ◽  
Dual Wavelength ◽  
Planar Structure ◽  
Nonradiative Recombination ◽  
Light Emitting ◽  
White Leds

Abstract We fabricated the dual-wavelength InxGa1−xN/GaN nanorods for wide-spectrum light-emitting diodes (LEDs) by silica nanosphere lithography (SNL) technique. The emission properties of the dual-wavelength nanorods are characterized by micro-photoluminescence (micro-PL), cathodoluminescence (CL), and temperature-dependent PL (TDPL) measurements. Nanorod structure can effectively suppress quantum confined Stark effect (QCSE) compared with planar structure due to the strain relaxation. In addition, the internal quantum efficiency (IQE) of the green quantum well (QW) within nanorod structure increases, but the IQE of the blue QW clearly decreases because blue QW has severely suffered from the nonradiative recombination by surface damage. Furthermore, the IQEs of the green QW and the blue QW within the nanorod structure can be effectively improved by wet etching treatment, with an increase in factor by 1.3 when compared with unetched nanorod structure. Evidently, the dual-wavelength InxGa1−xN/GaN nanorods are beneficial to improve the optical performance compared with planar structure, presenting a potential to realize monolithic, high-efficiency, and cost-effective white LEDs.

scholarly journals Universal host materials for red, green and blue high-efficiency single-layer phosphorescent organic light-emitting diodes

2020 ◽  
Vol 8 (46) ◽  
pp. 16354-16367
Author(s):  
Fabien Lucas ◽  
Cassandre Quinton ◽  
Sadiara Fall ◽  
Thomas Heiser ◽  
Denis Tondelier ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Organic Light Emitting Diodes ◽  
Device Structure ◽  
Organic Electronic ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
The Future

As simplifying the device structure is a key step for the future of organic electronic, we report herein high efficiency universal host materials for red, green and blue Single-Layer Phosphorescent OLEDs.

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