Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight

Schär, Daniel; Baumgartner, Franz

doi:10.4229/28thEUPVSEC2013-4AV.6.53

Full metadata record

DC Field	Value	Language
dc.contributor.author	Schär, Daniel	-
dc.contributor.author	Baumgartner, Franz	-
dc.date.accessioned	2018-11-27T14:45:36Z	-
dc.date.available	2018-11-27T14:45:36Z	-
dc.date.issued	2013	-
dc.identifier.isbn	3-936338-33-7	de_CH
dc.identifier.uri	https://digitalcollection.zhaw.ch/handle/11475/13261	-
dc.description.abstract	As the solar spectra are changing during the day, seasons and weather conditions, the accurate annual energy rating has to be based not only on the nominal power at Standard Test Conditions STC but also on the sensitivity of power versus spectrum. The aim of the work is to measure the spectral sensitivity of tandem modules within the current/voltage scan. A standard industrial flasher was used to measure amorphous / microcrystalline (a- Si/uc-Si) tandem modules. This system was equipped with a special developed dynamic LED backlight at ZHAW. Test samples were analyzed using different shapes of dynamic backlight superposing the standard flasher STC spectra. The change of the LED backlight in the millisecond regime according to triangular, rectangular and sinusoidal shapes were applied. The analyzes were manly performed on a-Si/uc-Si tandem modules (1.1m x 1.3m). A triangle backlight characteristic was applied, increasing the IR LED light from 0% to 7% of ISC of the crystalline Silicon reference cell. Immediately after that period of 1.25ms, the IR LEDs are turned off and the blue LED decay from again 7% of ISC to 0% remaining on top of the STC spectra. This analysis shows significantly different spectral sensitivity at this specific time of changing from IR to blue. On the one hand the current of the module at maximum power point (MPP) changes proportionally with the IR intensity increase. On the other hand the tandem module’s short circuit current shows no significant changes at the same IR intensity variation. The same method of analyzes are applied to a-Si/uc-Si tandem modules operating during 4 months and 34 months respectively, under real outdoor conditions. It is evident that this outdoor degraded modules show only marginal changes of the module current at MPP for the same increase of this dynamic IR LED backlight. Thus, a method together with the setup is presented and confirmed to measure the state of degradation of this kind of tandem module during the flasher period of a few milliseconds. The use of the presented dynamic LED backlight has the potential, in the industrial module production process, to improve the output of a standard STC flash during several milliseconds by providing information about the current matching of top and bottom tandem cells on a module scale.	de_CH
dc.language.iso	en	de_CH
dc.publisher	WIP	de_CH
dc.rights	Licence according to publishing contract	de_CH
dc.subject.ddc	621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnik	de_CH
dc.title	Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight	de_CH
dc.type	Konferenz: Paper	de_CH
dcterms.type	Text	de_CH
zhaw.departement	School of Engineering	de_CH
zhaw.organisationalunit	Institut für Energiesysteme und Fluid-Engineering (IEFE)	de_CH
dc.identifier.doi	10.4229/28thEUPVSEC2013-4AV.6.53	de_CH
zhaw.conference.details	28th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC), Paris, France, 30 September - 4 October 2013	de_CH
zhaw.funding.eu	No	de_CH
zhaw.originated.zhaw	Yes	de_CH
zhaw.pages.end	3535	de_CH
zhaw.pages.start	3532	de_CH
zhaw.publication.status	publishedVersion	de_CH
zhaw.publication.review	Not specified	de_CH
zhaw.title.proceedings	Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition	de_CH
zhaw.webfeed	Photovoltaik	de_CH
Appears in collections:	Publikationen School of Engineering

Files in This Item:

There are no files associated with this item.

Show simple item record

Schär, D., & Baumgartner, F. (2013). Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight [Conference paper]. Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition, 3532–3535. https://doi.org/10.4229/28thEUPVSEC2013-4AV.6.53

Schär, D. and Baumgartner, F. (2013) ‘Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight’, in Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition. WIP, pp. 3532–3535. Available at: https://doi.org/10.4229/28thEUPVSEC2013-4AV.6.53.

D. Schär and F. Baumgartner, “Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight,” in Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition, 2013, pp. 3532–3535. doi: 10.4229/28thEUPVSEC2013-4AV.6.53.

SCHÄR, Daniel und Franz BAUMGARTNER, 2013. Spectral sensitivity analyses of tandem modules using standard flasher and dynamic LED backlight. In: Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition. Conference paper. WIP. 2013. S. 3532–3535. ISBN 3-936338-33-7

Schär, Daniel, and Franz Baumgartner. 2013. “Spectral Sensitivity Analyses of Tandem Modules Using Standard Flasher and Dynamic LED Backlight.” Conference paper. In Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition, 3532–35. WIP. https://doi.org/10.4229/28thEUPVSEC2013-4AV.6.53.

Schär, Daniel, and Franz Baumgartner. “Spectral Sensitivity Analyses of Tandem Modules Using Standard Flasher and Dynamic LED Backlight.” Proceedings of the 28th European Photovoltaic Solar Energy Conference and Exhibition, WIP, 2013, pp. 3532–35, https://doi.org/10.4229/28thEUPVSEC2013-4AV.6.53.