Development of white LED based PV lighting systems

Sastry, O.S.; Devi, V. Kamala; Pant, P.C.; Prasad, G.; Kumar, Rajesh; Bandyopadhyay, Bibek

doi:10.1016/j.solmat.2010.04.013

Cited by 8 publications

(6 citation statements)

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“…International Journal of Photoenergy developing countries like Malawi, Zambia, and Cambodia, and so forth. For the developments of future technologies, solarpowered LED lighting technologies [9][10][11][12][13] can offer the offgrid energy services for the rural area and for the poor, while white LED based PV lighting systems [14] and organic LED lighting technologies [15,16] can continue to be explored in the area of energy saving lighting technologies. Besides, power management and intelligent control [17][18][19], thermal analysis and optimization [20,21], cooling [22], and reliability issue [23] are also important for LED technology developments.…”

Section: Trends Of Global Led Technologies and Marketsmentioning

confidence: 99%

Competing in the Global LED Industry: The Case of Taiwan

2014

International Journal of Photoenergy

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Light-emitting diode (LED) is a very essential application for energy-savings nowadays. The revenue of the Taiwan LED components industry is ranked top one in the world, followed by that of Japan and South Korea. Based on the advantage of their electronics industry, Taiwanese LED companies create a unique model to compete with the international firms. Large international LED companies achieve economies of scale by vertically integrating their operations. Taiwanese LED companies specialize and achieve an optimal efficiency by vertically disintegrating across the upstream, midstream, and downstream sectors in the value chains. Taiwanese LED companies create economies of scale and economies of scope through a complete industrial value chain.

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Section: Trends Of Global Led Technologies and Marketsmentioning

confidence: 99%

Competing in the Global LED Industry: The Case of Taiwan

2014

International Journal of Photoenergy

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“…99 Solar photovoltaic-based power systems running LEDs can also light up streets and one such system, developed in India, has been described by Sastry and colleagues. 100 It is diffi cult to gauge the improvement to general health and well-being enabled by solar-LED lighting systems in developing countries. However, judging by the willingness of governments and agencies such as the World Bank to lend support to schemes for their installation, 101 it becomes clear that solid-state power generation and lighting are having a huge impact on the lifestyle of the populace in many of the poorer countries of the world.…”

Section: Societal Impact Of Led Lightingmentioning

confidence: 99%

Solid-state lighting with wide band gap semiconductors

Rahman

2014

MRS Energy & Sustainability

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Gallium nitride is currently the wide band gap semiconductor material from which almost all commercial LEDs for solid-state lighting are manufactured but in the future other promising materials, such as zinc oxide (ZnO), are also likely to play a leading role.• With further developments in LED technology, leading to cheaper luminaires, perhaps based on gallium nitride-on-silicon material, LED lamps will largely replace tungsten incandescent bulbs in the years to come. ABSTRACTLight-emitting diodes (LEDs) made from wide band gap semiconductors, such as gallium nitride, are undergoing rapid development.Solid-state lighting with these LEDs is transforming patterns of energy usage and lifestyle throughout the world.With solid-state lighting gradually taking over from incandescent and fluorescent lighting, light-emitting diodes (LEDs) are very much the focus of research nowadays. This compact review takes a look at LEDs for lighting applications made from wide band gap semiconductors.A very brief history of electric lighting is included for completeness, followed by a description of blue-emitting LEDs that serve as pump sources for all 'white' LEDs. This is followed by a discussion on techniques to extract more light from the confines of LED chips through surface patterning. The thermal management of LEDs is perhaps the most important consideration in designing and using LED-based luminaires.This topic is discussed with regard to recent studies on LED reliability. The very promising development of gallium nitride-on-silicon LEDs is examined next followed by a discussion on phosphors for color conversion in LEDs. LED lighting has positively infl uenced both upscale and downscale illumination markets worldwide. Its societal impact is examined, with the review concluding with a look at efforts to produce LEDs from zinc oxide -a material that holds much promise for the future of solid-state lighting.vacuum tube era with devices based on gas-fi lled incandescent and fl uorescent bulbs illuminating our homes and workplaces. It is only over the last two decades that solid-state light generating devices in the form of light-emitting diodes (LEDs) have become available as an alternative for lighting up living spaces. 1 , 2 This review takes a look at their development, current status, and future prospects. After a brief historical introduction, the development and structure of the blue LED at the heart of all white LEDs are examined. This is followed by a description of various techniques that have been explored to extract more light from LED chips. Such techniques make LEDs brighter without increasing their energy consumption and thus enhance their attractiveness as energy-effi cient light sources. The relatively recent development of a gallium nitride-on-silicon material for low cost, high performance LEDs is examined next, followed by a look at the phosphor technology for white LEDs.The societal impact of LED lighting is then described with this review ending by examining the still distant goal of making LEDs out of zinc ox...

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“…In the past, various studies related to the technical optimization of solar street light applications have been reported [5]- [7]. Even though there are many works dedicated to the development of solar battery chargers, most of them focus on large scale power generation and high voltage applications [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

Osman¹,

Rahim²,

Selvaraj³

et al. 2015

Journal of Power Electronics

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Maximum power point tracking (MPPT) and battery charging control are two important functions for a solar battery charger. The former improves utilization of the available solar energy, while the latter ensures a prolonged battery life. Nevertheless, complete implementation of both functions can be complex and costly, especially for low voltage application such as standalone street lamps. In this paper, the operation of a solar battery charger for standalone street light systems is investigated. Using only one voltage sensor, the solar charger is able to operate in both MPPT and constant voltage (CV) charging mode, hence providing high performance at a low cost. Using a lab prototype and a solar simulator, the operation of the charger system is demonstrated and its performance under varying irradiance is validated.

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Development of white LED based PV lighting systems

Cited by 8 publications

References 1 publication

Competing in the Global LED Industry: The Case of Taiwan

Competing in the Global LED Industry: The Case of Taiwan

Solid-state lighting with wide band gap semiconductors

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

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