Degradation Mechanisms in LED Packages

Sau Koh, Willem van Driel, Cadmus Yuan, Guo Qi Zhang

Research output: Chapter in Book/Conference proceedings/Edited volumeChapterScientific

2 Citations (Scopus)


Lumen depreciation is one of the major failure modes in light-emitting diode (LED) systems. It originated from the degradation of the different components within the package, being the LED device or chip, the driver, and the optical materials (including phosphorous layer). This chapter describes the state of the art of the degradation mechanism for these components and how they contribute to the lumen depreciation of the LED package as a whole.
Original languageEnglish
Title of host publicationSolid State Lighting Reliability
EditorsW.D. van Driel, X.J. Fan
Place of PublicationNew York
PublisherSpringer Science
Number of pages20
ISBN (Electronic)978-1-4614-3067-4
ISBN (Print)978-1-4614-3066-7
Publication statusPublished - Jul 2013

Publication series

NameSolid State Lighting Technology and Application Series
ISSN (Print)2196-4203


  • Quantum Well
  • Phosphor Layer
  • Electrolytic Capacitor
  • Phenyl Salicylate
  • Lead Emitter


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