Experimental analysis and modeling of the< i> IV</i> characteristics of photovoltaic solar cells under solar spectrum spot illumination

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dc.contributor.authorMunji, M. K.
dc.contributor.authorvan Dyk, E.E.
dc.contributor.authorVorster, F.J.
dc.date.accessioned2014-10-21T11:30:15Z
dc.date.available2014-10-21T11:30:15Z
dc.date.issued2009-12
dc.descriptionDOI: 10.1016/j.physb.2009.09.013en_US
dc.description.abstractIn this paper, some models that have been put forward to explain the characteristics of a photovoltaic solar cell device under solar spot-illumination are investigated. In the experimental procedure, small areas of the cell were selected and illuminated at different solar intensities. The solar cell open circuit voltage (Voc) and short circuit current (Isc) obtained at different illumination intensities was used to determine the solar cell ideality factor. By varying the illuminated area on the solar cell, changes in the ideality factor were studied. The ideality factor obtained increases with decreasing illumination surface ratio. The photo-generated current at the illuminated part of the cell is assumed to act as a dc source that injects charge carriers into the p–n junction of the whole solar cell while the dark region of the solar cell operates in a low space charge recombination regime with small diffusion currents. From this analysis, a different model of a spot illuminated cell that uses the variation of ideality factor with the illuminated area is proposed.en_US
dc.identifier.citationPhysica B: Condensed Matter Volume 404, Issue 22, 1 December 2009, Pages 4457–4460 Proceedings of the Third South African Conference on Photonic Materialsen_US
dc.identifier.issn0921-4526
dc.identifier.other1873-2135
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/11502
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectIdeality factoren_US
dc.subjectSolar illumination intensitiesen_US
dc.subjectPhoto-generated currenten_US
dc.subjectRecombination mechanismsen_US
dc.titleExperimental analysis and modeling of the< i> IV</i> characteristics of photovoltaic solar cells under solar spectrum spot illuminationen_US
dc.typeArticleen_US
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