DEPENDENCE OF HIGH-POWER WHITE LEDS SPECTRAL CHARACTERISTICS ON JUNCTION TEMPERATURE

摘要

Junction temperature is a key parameter of the performance and lifetime of light emitting diodes (LEDs). The junction temperatures and spectral characteristics of high-power white LEDs were measured at different driving currents, and the spectral curve under different junction temperatures was obtained in this paper. The results show that W/B ratio exhibits a weak dependence, while the peak wavelengths of phosphor spectra and blue have no dependence on junction temperature.