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Single-Chip LED Emits White Light

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Daniel S. Burgess

Scientists in Taiwan have developed a white LED that promises to simplify the manufacture of these devices. Rather than optically stimulating a phosphor or mixing the outputs of two or three LEDs of different wavelengths to generate white light, they have employed silicon- and zinc-doped InGaN/GaN multiple quantum wells. A research team in Taiwan has developed a single-chip, phosphorless white LED. The room-temperature photoluminescence spectra of the devices grown at different temperatures illustrate the dependence of the output on the indium concentration in the codoped...Read full article

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    Published: June 2002
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