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Open AccessArticle

Measuring Thermally-Driven LED Emissions via Voltage Modulation near Zero Bias

1
ThermaWatts, LLC, Renton, WA 98057, USA
2
Department of Physics, Oregon State University, Corvallis, OR 97331, USA
*
Author to whom correspondence should be addressed.
Electronics 2018, 7(12), 360; https://doi.org/10.3390/electronics7120360
Received: 16 October 2018 / Revised: 20 November 2018 / Accepted: 23 November 2018 / Published: 28 November 2018
(This article belongs to the Section Microelectronics and Optoelectronics)
This study was launched to demonstrate that LEDs at zero bias show recombination photon emissions, and to check the models for the same. A method for measuring the light emission for a LED near zero bias is presented. A large reverse bias sufficient to suppress detectable emissions is assumed. The bias voltage between ‘large reverse’ and our target voltage is modulated, and the difference measured. The measured emissions found are consistent with the Shockley diode equation. The spectrum near zero bias can be measured and characterized. It shows LED behavior that is substantially different from other typical measurements, and suggests a violation of Kirchhoff’s Law. View Full-Text
Keywords: LED low bias photoemission; non-blackbody radiations; thermal photoemission LED low bias photoemission; non-blackbody radiations; thermal photoemission
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MDPI and ACS Style

Orem, P.M.; Vogt, K.T.; Graham, M.W.; Orem, F.M. Measuring Thermally-Driven LED Emissions via Voltage Modulation near Zero Bias. Electronics 2018, 7, 360.

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