Abstract
Lighting technology is continuously improving for greater comfort, higher power efficiency and due to concerns about health and environment issues. The evolution of lighting technology through conversion of electricity into light led to the revolution in Light Emitting Diodes (LEDs). LEDs are given more importance for both indoor and outdoor lighting due to their long life span compared to any other lighting technology; the very high efficiency they reach equivalent to the fluorescent lamps’ technology of today and will certainly surpass in the future; they are also very environment friendly and their price is continuously dropping making them more and more competitive. The objective of this chapter is to present the fundamentals about LEDs, the technology, operation, evolution and lighting applications. LEDs were among the first commercialized semiconductor devices; this chapter also shows why LEDs technology is the lighting technology of the future and the perfect match when considering the environment and the use of green energies. LEDs save more than 80% of energy compared to incandescent light bulbs with an efficiency comparable to fluorescent lamps of today and continuously increasing, a longer life span and a better environmental impact.
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References
Ashcroft NW, Mermin ND (1981) Solid state physics. Saunders College Publishing, Philadelphia
CIE Technical Report 177 (2007) Color rendering of white LED light sources. http://www.cie.co.at/index.php/Publications/index.php?i_ca_id=453
Geisler-Moroder D, Dür A (2009) Color-rendering indices in global illumination methods. J Electron Imaging 18:043015-1–043015-12
Hlonyak N, Bevacqua SF (1962) Coherent (visible) light emission from Ga(As1−x P x ) junctions. Appl Phys Lett 1:82–83
Hummel RE (1985) Electronic properties of materials, 3rd edn. Kindle Edition
Kittel C (1996) Introduction to solid state physics, 7th edn. Wiley, New York
Nakamura S, Mukai T, Senoh M (1994) Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes. Appl Phys Lett 64:1687–1689
Nakamura S, Senoh M, Iwasa N, Nagahama S‐i (1995) High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes. Appl Phys Lett 67:1868–1870
Rupprecht H, Woodall JM, Pettit GD (1967) Efficient visible electroluminescence at 300 K from Ga1−x Al x As p−n junctions grown by liquid-phase epitaxy. Appl Phys Lett 11:81–83
Steele RV (2007) The story of a new light source. Nat Photonics 1:25–26
Sze SM, Ng KK (2007) Physics of semiconductor devices, 3rd edn. Wiley, New York
Tanabe S, Fujita S, Yoshihara S, Sakamoto A, Yamamoto S (2005) YAG glass-ceramic phosphor for white LED (II): Luminescence characteristics. Proc of SPIE 5941:594112-1–594112-6
Data source: http://en.wikipedia.org/wiki/Luminous_efficacy
US Department of energy, LED measurement series: color rendering index and LEDs
US Department of energy. http://www.energy.gov/
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© 2011 Springer-Verlag London Limited
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Pode, R., Diouf, B. (2011). Light Emitting Diodes. In: Solar Lighting. Green Energy and Technology. Springer, London. https://doi.org/10.1007/978-1-4471-2134-3_3
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DOI: https://doi.org/10.1007/978-1-4471-2134-3_3
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