A non-contact method for determining the junction temperature of GaN-based blue light LED

作者：Jie, Guo^*; Ma, Junshan; Feng, Rao

来源：Modern Physics Letters B, 2017, 31(19-21): 1740023.

DOI：10.1142/S0217984917400231

• Junction
• temperature
• spectrum
• centroid wavelength
• FWHM

A novel method to determine the junction temperature of GaN type blue light LED based on the spectral parameters is proposed. In this method, the relationships among LED junction temperature, centroid wavelength and FWHM are obtained in the lab, and then the junction temperature of operating LED of the same type can be derived from this relationship. A comparative analysis of the junction temperatures which are measured with the centroid wavelength-FWHM method and with the forward voltage method is performed. The standard deviation between these two methods is found to be about 2.3 degrees C. Therefore, the combination of centroid wavelength and FWHM can be used to determine the junction temperature of GaN-based blue LED.

• 出版日期2017-7-30
• 单位常州工学院; 上海理工大学