Electroluminescence
type: Ontology
creation date: 2026-08-06T05:48:41+02:00
imports: http://semantic-mediawiki.org/swivt/1.0

Electroluminescence
type: Subject
type: Category:Glossary
page: https://wiki.openmod-initiative.org/wiki/Electroluminescence
wiki namespace: 0
glossary abbreviation: EL
glossary definition: 1. Electroluminescence (EL) is an optical phenomenon and electrical phenomenon in which a material emits light in response to the passage of an electric current or to a strong electric field. This is distinct from black bodylight emission resulting from heat , from a chemical reaction, sound, or other mechanical action.
glossary definition: 2. Electroluminescence (EL) imaging takes advantages of the radiadive inter-band recombination of excited charge carriers in solar cells. For electroluminescence investigation the module is operated as a light emitting diode and the emitted radiation due to recombination effects can be detected with a sensitive Si-CCDs camera. For electroluminescence images, the solar cells are supplied, via their metal contacts, with a defined external excitation current while the camera takes an image of the emitted photons at wavelength > 850 nm. Since EL is a low light source, a dark environment is necessary in order to decrease the background noise during the measure. Damaged areas of a solar module appear dark or shine less than good areas. Electroluminescence imaging can be used to detect a multitude of defects in crystalline silicon solar cells, furthermore EL technique provide images with very high resolution that enable to resolve details lesser in size than IR-images that should be hardly perceptible to the eye, such as: micro cracks, bad finger contacts, Crystallization faults in cell material.
glossary sources: https://en.wikipedia.org/wiki/Electroluminescence (1.); http://www.cepsolar.com/electroluminescence-imaging (2.)
glossary subterm of: Test
glossary subterm of: Control
wiki page creation date: 2017-11-06T10:11:21Z
creation date#aux: 2458063.9245486
wiki page last editor: User:Lilly Schoen
wiki page modification date: 2017-11-06T10:11:21Z
modification date#aux: 2458063.9245486
wiki page is new: true
wiki page sort key: Electroluminescence