This book covers all aspects of the technology and physics of infrared, visible-spectrum, and white-light-emitting diodes (LEDs) made from IIIaV semiconductors. It reviews elementary properties of LEDs such as the electrical and optical characteristics, as well as advanced device physics including high-efficiency device designs, light extraction, radiative and non-radiative recombination dynamics, spontaneous recombination in resonant-cavity structures, and packaging. It introduces related areas such as human vision, photometry, colorimetry, and color rendering. Application of infrared and visible-spectrum LEDs in silica fiber, plastic fiber, and free-space communication is discussed. Extensive semiconductor material data, device design data, and analytic formulas governing LED operation are provided. Exercises and illustrative examples are included and an introductory chapter reviews the historical developments and milestones of LED research and development. This textbook will be of interest to scientists and engineers working on LEDs, and to graduate students in electrical engineering, applied physics and materials science.72.5 White LEDs based on semiconductor converters (PRS-LED) LEDs using semiconductor wavelength converters have been ... It is assumed that the electrical input power is Pu, and the output powers in the blue and amber spectral range are P, and P2, respectively. ... To calculate the optimum wavelength of operation, we represent white light by the Illuminant C standard, for which the chromaticityanbsp;...
|Author||:||E. Fred Schubert|
|Publisher||:||Cambridge University Press - 2003-05-15|