Introduction to the development history of road lights

For the common solar street light, do you know its history? Let the relevant technical personnel of the led street light department explain the development process of the led street light to you. As the most eye-catching new-generation light source in the world, LED is known as the most promising green lighting source in the 21st century due to its advantages of high brightness, low heat, short life, non-toxicity, and recyclability. Since the birth of the first red semiconductor light-emitting diode in 1962, people have continuously developed a variety of single-color LEDs such as orange, yellow, and green, which are used in various signal indications, signs, digital displays, and gradually developed into small LED displays, etc. . It uses a solid semiconductor chip as a light-emitting material. When the excess energy is released, it causes photon emission and produces an LED that can be made of a semiconductor PN junction light source. It came out in the early 1960s. The LEDs appear. The world's first commercial light-emitting diode (LED) was made of germanium in 1965, and its unit price was $45. Soon after, Monsanto and Hewlett-Packard successively launched commercial LEDs made of GaAsP materials. This is much lower than the 151m of the general 60-100W incandescent lamp. In 1991, the industry adopted MOCVD epitaxial growth of quaternary materials to develop high-brightness light-emitting diodes; in 1994, the first blue light-emitting diodes were developed on GaN substrates; 1997 In 2001, the first white light LED was made by exciting the phosphor powder with blue light; in 2001, the white light LED was made by exciting the phosphor powder with ultraviolet light. To the current popularity of solar street lights, we can be said to have experienced half a century of development. I believe that the technology of solar street lights will be more advanced and the price will be lower in the future.
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