Modeling Study of Red LED Spectral Characteristics

LED is widely used in various fields as a new style of light sources. Among the various characteristics of the LED, photoelectric characteristics are often the most intuitive and practical. This paper will discuss the photoelectric characteristics of red LED. A study on the relationship between the forward current and luminescence spectrum, peak wavelength, main wavelength, color purity, luminous flux, luminous efficiency is presented. The experimental results show that the spectrum, peak wavelength and main wavelength of the red LED will shift red with the increase of the forward current, and the color purity will remain at a high level during the period. In addition, the luminous flux and light intensity increase with the increase of forward current, the luminous flux from 0.5 lm to 3.5 lm, but the luminous efficiency decreases with the increase of forward current. from 40 lm/w to 32 lm/w.