Hauptseite > Publikationsdatenbank > Failure Analysis of Thin Film Solar Modules using Lock-in Thermography > print

001     200910
005     20240712084457.0
020 _ _ |a 978-3-95806-047-0
024 7 _ |2 Handle
|a 2128/8976
024 7 _ |2 ISSN
|a 1866-1793
037 _ _ |a FZJ-2015-03263
041 _ _ |a English
100 1 _ |0 P:(DE-Juel1)138446
|a Siegloch, Max
|b 0
|e Corresponding Author
|g male
|u fzj
245 _ _ |a Failure Analysis of Thin Film Solar Modules using Lock-in Thermography
|f 2014-12-16
260 _ _ |a Jülich
|b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
|c 2015
300 _ _ |a XIII, 131 S.
336 7 _ |0 PUB:(DE-HGF)11
|2 PUB:(DE-HGF)
|a Dissertation / PhD Thesis
|b phd
|m phd
|s 1432811970_29461
336 7 _ |0 PUB:(DE-HGF)3
|2 PUB:(DE-HGF)
|a Book
|m book
336 7 _ |0 2
|2 EndNote
|a Thesis
336 7 _ |2 DRIVER
|a doctoralThesis
336 7 _ |2 BibTeX
|a PHDTHESIS
336 7 _ |2 DataCite
|a Output Types/Dissertation
336 7 _ |2 ORCID
|a DISSERTATION
490 0 _ |a Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment
|v 258
502 _ _ |a RWTH Aachen, Diss., 2014
|b Dr.
|c RWTH Aachen
|d 2014
520 _ _ |a Lock-in thermography (LIT) is an imaging method that depicts radiated heat andits diffusion in manifold samples. LIT offers versatile possibilities for the characterization of solar cells and modules since the radiated heat is proportional to the dissipation of electrical power. Up to now, the quantitative correlation of detected heat and dissipated electrical power has been known for silicon solar cells only. For many other types of solar cells and modules – especially thin film solar cells – LIT has been used as aqualitative measurement tool for depicting the location of defects, for example. Thus, the potential of LIT in terms of the calculation of power generation and dissipation in thin film solar cells has not been exploited. This visualization and calculation of power flows leads to a better understanding of the influences of defects on the efficiency of solar modules. Furthermore, it enables the evaluation of potential improvements, which results in solar modules with higher efficiencies, produced to lower costs. In order to interpret LIT signals accurately, the lock-in algorithm and particularly its limits have to be understood. The present thesis shows the evaluation of the lock-in algorithm and its algebraic complex result with simulations. It is found that the weak points of the lock-in algorithm lie in the sampling of the acquired heat signal. Sampling moments that are not uniformly distributed in a lock-in period produce unreliable results. A low sampling at high measurement frequencies shows significant deviations distorting the LIT result. The findings allow for the development of user-friendly LIT systems that automatically avoid sampling errors and produce reliable LIT results. The comprehension of LIT measurements of thin film solar cells needs a theoretical thermal model for the solar cells that can be used to solve the differential heat diffusion equation. The solution describes the surface temperature distribution that is acquired in LIT measurements. By the evaluation of the frequency response of a point heat source in a thin film solar cell, a simple thermal model representing a solid body is found to adequately reproduce LIT measurements. LIT investigations in the scale of the thermal diffusion length are hampered by the diffusion of heat that leads to a blurring of heat sources. With the description of the thermal model and a Fourier transform technique, it is possible to successfully deconvolute the heat generating sources from the heat diffusion, meaning the removal of the thermal blurring. This leads to the unimpeded visualization of the dissipated power of small heat sources such as shunts or the series interconnection of cells in a thin film solar module [...]
536 _ _ |0 G:(DE-HGF)POF3-121
|a 121 - Solar cells of the next generation (POF3-121)
|c POF3-121
|f POF III
|x 0
650 _ 7 |x Diss.
773 _ _ |y 2015
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.pdf
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.gif?subformat=icon
|x icon
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.jpg?subformat=icon-1440
|x icon-1440
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.jpg?subformat=icon-180
|x icon-180
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.jpg?subformat=icon-640
|x icon-640
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/200910/files/Energie_Umwelt_258.pdf?subformat=pdfa
|x pdfa
|y OpenAccess
909 C O |o oai:juser.fz-juelich.de:200910
|p openaire
|p open_access
|p driver
|p VDB
|p dnbdelivery
910 1 _ |0 I:(DE-588b)5008462-8
|6 P:(DE-Juel1)138446
|a Forschungszentrum Jülich GmbH
|b 0
|k FZJ
913 0 _ |0 G:(DE-HGF)POF2-111
|1 G:(DE-HGF)POF2-110
|2 G:(DE-HGF)POF2-100
|a DE-HGF
|b Energie
|l Erneuerbare Energien
|v Thin Film Photovoltaics
|x 0
913 1 _ |0 G:(DE-HGF)POF3-121
|1 G:(DE-HGF)POF3-120
|2 G:(DE-HGF)POF3-100
|a DE-HGF
|l Erneuerbare Energien
|v Solar cells of the next generation
|x 0
|4 G:(DE-HGF)POF
|3 G:(DE-HGF)POF3
|b Energie
914 1 _ |y 2015
915 _ _ |0 StatID:(DE-HGF)0510
|2 StatID
|a OpenAccess
920 _ _ |l yes
920 1 _ |0 I:(DE-Juel1)IEK-5-20101013
|k IEK-5
|l Photovoltaik
|x 0
980 1 _ |a FullTexts
980 _ _ |a phd
980 _ _ |a VDB
980 _ _ |a FullTexts
980 _ _ |a UNRESTRICTED
980 _ _ |a book
980 _ _ |a I:(DE-Juel1)IEK-5-20101013
981 _ _ |a I:(DE-Juel1)IMD-3-20101013

LibraryCollectionCLSMajorCLSMinorLanguageAuthor
Marc 21