The story of RGB LEDs, and the man who made them pop.
It was here that Craford bumped into Nick Holonyak, designer of the original LED, who put on a fascinating show of dropping a little red LED into a glass Dewar of liquid nitrogen. Craford says it"lit up the whole flask with a bright red light." It was this display that prompted him to drop several years of research into tunnelling effects in Josephson junctions, and Holonyak took him under his wing.
What they were trying to understand was why adding pressure to GaAsP samples caused their brightness to increase by"several orders of magnitude." He and Greg Stillman made great leaps in their, finding that light shining on the samples caused the resistance to decrease and remain low as long as the temperature did , though this only occurred in samples containing sulfur, and not those doped with tellurium.
After his PhD, Craford went to work at Monsanto Co. to continue his focus on gallium arsenide phosphide research, but it was a researcher from Bell Labs that prompted Craford to head down the righteously colour-filled RGB path.
Belgique Dernières Nouvelles, Belgique Actualités
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