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

Arques Orobón, Francisco José; Núñez Mendoza, Neftalí; Vázquez López, Manuel; González Posadas, Vicente y 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.

Descripción

Título: High-power UV-LED degradation: Continuous and cycled working condition influence
Autor/es:
  • Arques Orobón, Francisco José
  • Núñez Mendoza, Neftalí
  • Vázquez López, Manuel
  • González Posadas, Vicente
  • Segura Antunez, C.
Tipo de Documento: Artículo
Título de Revista/Publicación: Solid -State Electronics
Fecha: 2015
Volumen: 111
Materias:
Palabras Clave Informales: UV-LED Degradation Reliability, Accelerated life test, Thermo-mechanical simulation.
Escuela: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Departamento: Teoría de la Señal y Comunicaciones
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 40338
Identificador DC: http://oa.upm.es/40338/
Identificador OAI: oai:oa.upm.es:40338
Identificador DOI [BETA]: 10.1016/j.sse.2015.05.039
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0038110115001719
Depositado por: Memoria Investigacion
Depositado el: 06 Abr 2017 11:37
Ultima Modificación: 06 Abr 2017 13:11
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