Experiment for Study Effect of Temperature Dependence of Spectrum in LED

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Benjawan Unpook
Bhanupol Klonkratog
Nalita Sawangjit
Chawanon Mano
Pattareeya Damrongsak


The purpose of this research was to develop an experimental system to study the influence of heat on the emission spectrum of LED and to study the precision of the developed system. In this study, a blue LED chip (1 Watt) was used as a sample. A 120 Watt thermoelectric (TE) module was used as a heater for the light source. A spectrometer was used to measure the emission spectrum of the LED. The developed system was used in semiconductor devices laboratory subject in Bachelor of science (Applied Physics program). The results of the study showed that as the temperature increases from 30 to 70 °C, the emission spectrum of LED tends to decrease and agree with the theory.

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Unpook, B., Klonkratog, B., Sawangjit, N. ., Mano, C. ., & Damrongsak, P. . (2023). Experiment for Study Effect of Temperature Dependence of Spectrum in LED. Journal of Science Ladkrabang, 32(1), 41–52. Retrieved from https://li01.tci-thaijo.org/index.php/science_kmitl/article/view/255630
Research article


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