Characterization of junction temperature of blue LED using centroid wavelength combined with FWHM

Feng Rao; Tao Yu; Haifeng Liu; Yefang Sun; Wuke Pan; Ziqiang Chen

doi:10.1117/12.3025593

8 April 2024 Characterization of junction temperature of blue LED using centroid wavelength combined with FWHM

Feng Rao, Tao Yu, Haifeng Liu, Yefang Sun, Wuke Pan, Ziqiang Chen

Proceedings Volume 13090, International Conference on Computer Application and Information Security (ICCAIS 2023); 1309004 (2024) https://doi.org/10.1117/12.3025593
Event: International Conference on Computer Application and Information Security (ICCAIS 2023), 2023, Wuhan, China

Abstract

This paper presents a non-contact method for characterizing junction temperature (Tj) of GaN-based blue LED using the centroid wavelength combined with the full width at half maximum (FWHM). By establishing the relationship between the centroid wavelength, FWHM, junction temperature, and driving current of LED, a method employing combination centroid wavelength and FWHM for junction temperature characterization is derived. Ten GaN-based blue LEDs are chosen as samples, which junction temperatures are measured under various operating conditions using both the new method and forward voltage method. The research demonstrates that the new method characterizes effectively Tj of GaN-based blue LED with an average error of 2.3°C. This study holds significant importance in LED design and application.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Feng Rao, Tao Yu, Haifeng Liu, Yefang Sun, Wuke Pan, and Ziqiang Chen "Characterization of junction temperature of blue LED using centroid wavelength combined with FWHM", Proc. SPIE 13090, International Conference on Computer Application and Information Security (ICCAIS 2023), 1309004 (8 April 2024); https://doi.org/10.1117/12.3025593

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