Journal ArticleDOI
Series resistance imaging in solar cells by lock‐in thermography
TLDR
In this article, two operation modes of lock-in thermography are introduced to detect regions of high series resistance in solar cells, working in the dark and under illumination, where images taken under two different conditions are used to calculate an image.Abstract:
Two operation modes of lock-in thermography are introduced to detect regions of high series resistance in solar cells. These are differential techniques, working in the dark and under illumination, where images taken under two different conditions are used to calculate an image, which is especially sensitive to series resistance variations. Though the series resistance cannot be measured quantitatively by these techniques, regions of increased emitter contact resistance can be reliably detected. A realistic electrothermal modelling of a series resistance defect in a solar cell with and without illumination is presented. The new thermographic techniques are compared with established techniques for series resistance imaging. Especially the technique working under illumination gives results that agree very well with those of other methods. Copyright © 2005 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Spatially resolved series resistance of silicon solar cells obtained from luminescence imaging
TL;DR: In this article, the series resistance of a monocrystalline industrial screen printed silicon solar cell was measured using luminescence images taken by a thermoelectrically cooled silicon charge coupled device camera.
Journal ArticleDOI
In situ silicon oxide based intermediate reflector for thin-film silicon micromorph solar cells
Peter Buehlmann,Julien Bailat,Didier Domine,Adrian Billet,F. Meillaud,Andrea Feltrin,Christophe Ballif +6 more
TL;DR: In this paper, SiO-based intermediate reflectors (SOIRs) can be fabricated in the same reactor and with the same process gases as used for thin-film silicon solar cells.
Journal ArticleDOI
Advanced luminescence based effective series resistance imaging of silicon solar cells
TL;DR: In this article, a technique for fast and spatially resolved measurement of the effective series resistance of silicon solar cells from luminescence images is introduced, which offers significant advantages in that it is more robust against variations in local diode characteristics.
Journal ArticleDOI
Recombination current and series resistance imaging of solar cells by combined luminescence and lock-in thermography
TL;DR: In this article, the authors performed recombination current and series resistance imaging on large-area crystalline silicon solar cells using a combined analysis of camera-based dark lockin thermography (DLIT) and electroluminescence (EL) imaging.
Journal ArticleDOI
Optical management in high-efficiency thin-film silicon micromorph solar cells with a silicon oxide based intermediate reflector
TL;DR: In this paper, the authors presented a PVLAB-LAB-ARTICLE-2008-002, which is the first PV-LAB article to use the PssR algorithm.
References
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Book
Lock-in thermography : basics and use for functional diagnostics of electronic components
Otwin Breitenstein,M. Langenkamp +1 more
TL;DR: In this article, physical and technical basics, experimental technique, theory, measurement strategies, and typical applications are presented for measurement strategies and their application in the field of computer vision..
Journal ArticleDOI
Shunts due to laser scribing of solar cells evaluated by highly sensitive lock-in thermography
TL;DR: In this paper, a lock-in thermography system was used to investigate edge leakage currents in silicon solar cells after laser scribing and cleavage, enabling the detection of periodic surface temperature oscillations below 10μK.
Journal ArticleDOI
CELLO: an advanced LBIC measurement technique for solar cell local characterization
TL;DR: In this paper, the spatial distribution of local properties of a solar cell is mapped using light-beam induced current (LBIC) measurements, which can be used to map defects and grain boundaries using reflectivity data and surface etching.
Journal ArticleDOI
Realistic evaluation of power losses in solar cells by using thermographic methods
Joerg Isenberg,Wilhelm Warta +1 more
TL;DR: In this article, a spatially resolved image of leakage currents in solar cells is obtained by using illuminated lock-in thermography, which is directly proportional to the local power losses in the solar cell.
Journal ArticleDOI
Electrothermal simulation of a defect in a solar cell
TL;DR: In this paper, a local electrothermal simulation of a model solar cell is presented, showing that the total dissipated heat splits into heating terms (thermalization, recombination, and Joule heat) and different Peltier cooling terms.