High-power UV-LED degradation: Continuous and cycled working condition influence

Arques Orobón, Francisco José and Núñez Mendoza, Neftalí and Vázquez López, Manuel and González Posadas, Vicente and Segura Antunez, C. (2015). High-power UV-LED degradation: Continuous and cycled working condition influence. "Solid -State Electronics", v. 111 ; pp. 111-117. ISSN 0038-1101. https://doi.org/10.1016/j.sse.2015.05.039.

Description

Title: High-power UV-LED degradation: Continuous and cycled working condition influence
Author/s:
  • Arques Orobón, Francisco José
  • Núñez Mendoza, Neftalí
  • Vázquez López, Manuel
  • González Posadas, Vicente
  • Segura Antunez, C.
Item Type: Article
Título de Revista/Publicación: Solid -State Electronics
Date: 2015
ISSN: 0038-1101
Volume: 111
Subjects:
Freetext Keywords: UV-LED Degradation Reliability, Accelerated life test, Thermo-mechanical simulation.
Faculty: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Department: Teoría de la Señal y Comunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

High-power (HP) UV-LEDs can replace UV lamps for real-time fluoro-sensing applications by allowing portable and autonomous systems. However, HP UV-LEDs are not a mature technology, and there are still open issues regarding their performance evolution over time. This paper presents a reliability study of 3W UV-LEDs, with special focus on LED degradation for two working conditions: continuous and cycled (30 s ON and 30 s OFF). Accelerated life tests are developed to evaluate the influence of temperature and electrical working conditions in high-power LEDs degradation, being the predominant failure mechanism the degradation of the package. An analysis that includes dynamic thermal and optical HP UV-LED measurements has been performed. Static thermal and stress simulation analysis with the finite element method (FEM) identifies the causes of package degradation. Accelerated life test results prove that HP UV-LEDs working in cycled condition have a better performance than those working in continuous condition.

Funding Projects

TypeCodeAcronymLeaderTitle
Universidad Politécnica de MadridP125901516UnspecifiedUnspecifiedUnspecified

More information

Item ID: 40338
DC Identifier: http://oa.upm.es/40338/
OAI Identifier: oai:oa.upm.es:40338
DOI: 10.1016/j.sse.2015.05.039
Official URL: http://www.sciencedirect.com/science/article/pii/S0038110115001719
Deposited by: Memoria Investigacion
Deposited on: 06 Apr 2017 11:37
Last Modified: 04 Jun 2019 17:06
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