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1. White LED technologies
LEDs (Light Emitting Diodes), all made of semiconductors (a polarized semiconductor junction through which a current flows), emit light that can be considered monochromatic (spectral width at half-height between 15 and 30 nm). However, there are different types of semiconductor, doped in different ways, which allow us to scan a large part of the visible spectrum (from near-UV, at 380 nm, to near-infrared, at 750 nm).
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The Ultimate Scientific and Technical Reference
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White LED technologies
Bibliography
Websites
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University of California – Materials and ECE Departments
https://www.bachelorstudies.fr/universites/Etats-Unis/University-of-California-Los-Angeles-UCLA/
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Rensselaer Polytechnic Institute – Lighting...
Statistical and economic data
At the end of 2008, LED lighting accounted for less than 2% of the total market.
The next 4 to 5 years will see a sharp increase in their market share in a number of areas (figure 1...
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The Ultimate Scientific and Technical Reference