LED Lighting
Date:2011-05-16 11:56
Status:Be resolved
Question:admin
mitting regions of semiconductor material with band gap Eg a photoelectric Orr
Off, that is???? 1240/Eg (mm) where Eg the unit electron volt (eV). If we can produce visible light (wavelength of 380nm ~ 780nm violet red), Eg of semiconductor materials should be between 3.26 ~ 1.63eV. Longer wavelength than the red light to infrared light. Now have infrared, red, yellow, green and blue LEDs, but the cost of Blu-ray diode, the price is high, use of non-universal.
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