Comparative Study on Intensity of Electroluminescence for Commercial LEDs

Abstract

Study the intensity of light-emitting diodes (LEDs) in different colors and the wavelengths of light emitting to confirm the color emitted of LEDs, while giving the same electrical power as know as electroluminescence. And compare the intensity of light, while changing electrical energy to be different. It was found that the same electric power at 2.7 volts, current at 0.018 mA, white LEDs gave the best light intensity. The lowest intensity was green LEDs. The electroluminescence spectra were found that 2 peak of white LEDs and 1 peak for green, red and yellow LEDs. Different electrical energy with white LEDs was found that the intensity of the white light increase with increasing the electrical energy. From the analysis indicated that white LEDs was the most suitable for application.