NDLI: Physical mechanisms of breakdown in multicrystalline silicon solar cells

Content Provider	IEEE Xplore Digital Library
Author	Breitenstein, O. Bauer, J. Wagner, J.-M. Blumtritt, H. Lotnyk, A. Kasemann, M. Kwapil, W. Warta, W.
Copyright Year	2009
Description	Author affiliation: Fraunhofer Institute of Solar Energy Systems, Heidenhofstr. 2, D-79110 Freiburg, Germany (Kasemann, M.; Kwapil, W.; Warta, W.) \|\| Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany (Breitenstein, O.; Bauer, J.; Wagner, J.-M.; Blumtritt, H.; Lotnyk, A.)
Abstract	We have identified at least five different local breakdown mechanisms according to the temperature coefficient (TC) and slope of their characteristics and electroluminescence (EL) under reverse bias. These are (1) early pre-breakdown (strongly negative TC, low slope), (2) edge breakdown (positive TC, low slope, no EL), (3) weak defect-induced breakdown (zero or weakly negative TC, moderate slope, 1550 nm defect luminescence), (4) strong defect-induced breakdown (zero or weakly negative TC, moderate slope, no or weak defect luminescence), and (5) avalanche breakdown at dislocation-induced etch pits (negative TC, high slope). The latter mechanism usually dominates at high reverse bias. In addition to the local breakdown sites there is evidence of an areal reverse current between the dominant breakdown sites showing a positive TC. Since defect-induced breakdown shows a zero or weakly negative TC and also leads to weak avalanche multiplication, we propose defect level-induced avalanche instead of trap-assisted tunneling to be responsible for this breakdown mechanism.
Starting Page	000181
Ending Page	000186
File Size	12487804
Page Count	6
File Format	PDF
ISBN	9781424429493
ISSN	01608371
DOI	10.1109/PVSC.2009.5411700
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric breakdown Silicon Photovoltaic cells Inverters Solar power generation Mesh generation Power generation Photovoltaic systems Impedance Pollution measurement
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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