The evolution in the history of LED light is undeniable, beginning at the beginning of the 20th century, Captain Henry Joseph Round, one of the earliest pioneers of radio, discovered electro-luminescence, that is, that light could be produced through Semiconductor materials, although it was the Russian scientist Oleg Vladimirovich Losev, 20 years later who created from Zinc Oxide and silicon carbide, the first LED in the form of diode.
At that time, it was not possible to find usefulness to this discovery by what goes unnoticed until Nick Holonyak retakes it in 1962, this time with new materials such as Phosphorus (F), Arsenic (As) and Gallium (Ga), invented The first low-current LED with red diode as described in allpubliclibraries.com.
We advanced in time until the 70’s, when new electronic devices were started, for which advances in LED diodes, which had already achieved different colors like yellow or amber, were very useful. Mix of various semiconductor materials in different proportions, these being the first LED mass produced.
As they are already commercially useful, various devices with LEDs, such as television sets of the era, computers and other household appliances used in homes equipped with light indicators, are beginning to be manufactured, not to mention advertising posters. In this new manufacture other materials are used as Aluminum (Al), which replaces the previous Phosphorus (F), maintaining the Arsenic (As) and Gall (Ga), which allows to achieve greater luminosity.
The advances were progressively optimized by more modern production systems as well as new materials that envelop LED light emitting diodes
In the late 1990s, a Japanese researcher named Shuji Nakamura introduced other materials such as Sapphire, Silicon (Si) and Nitrogen (N) to achieve a blue LED light.
After this finding, there were already three primary colors for the Ledes and thus achieve a white light, which allowed to greatly expand their possibilities and consequently their uses in the technology that is evolving towards a new lighting and lighting.
Do not miss the second part of this article on the history of LED (light emitting diode) , which certainly allows us to better understand its timing and evolution.
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