Loading...
Loading...

Go to the content (press return)

Determination of LEDs degradation with entropy generation rate

Author
Cuadras, A.; Yao, J.; Quilez, M.
Type of activity
Journal article
Journal
Journal of applied physics
Date of publication
2017-10-14
Volume
122
First page
2
Last page
8
DOI
https://doi.org/10.1063/1.4996629 Open in new window
URL
http://aip.scitation.org/doi/10.1063/1.4996629 Open in new window
Abstract
We propose a method to assess the degradation and aging of light emitting diodes (LEDs) based on irreversible entropy generation rate. We degraded several LEDs and monitored their entropy generation rate (S) in accelerated tests. We compared the thermoelectrical results with the optical light emission evolution during degradation. We find a good relationship between aging and S (t), because S is both related to device parameters and optical performance. We propose a threshold of S (t) as a relia...
Group of research
EPIC - Energy Processing and Integrated Circuits
GRUP ISI - Instrumentation, Sensors and Interfaces Group

Participants