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Advances in Condensed Matter Physics
Volume 2017, Article ID 1946490, 5 pages
https://doi.org/10.1155/2017/1946490
Research Article

Study of Low Voltage Prebreakdown Sites in Multicrystalline Si Based Cells by the LBIC, EL, and EDS Methods

1Institute of Solid State Physics RAS, Chernogolovka, Russia
2Institute of Microelectronics Technology RAS, Chernogolovka, Russia
3D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia
4Innotra LLC, Moscow, Russia

Correspondence should be addressed to E. P. Magomedbekov; ur.utcr@radle

Received 16 February 2017; Revised 20 March 2017; Accepted 21 March 2017; Published 10 April 2017

Academic Editor: Sergei Sergeenkov

Copyright © 2017 V. I. Orlov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Breakdown sites in multicrystalline Si solar cells have been studied by reverse-bias electroluminescence, electron beam induced current (EBIC) and laser beam induced current (LBIC), and Energy Dispersive X-Ray Spectroscopy methods. In the breakdown sites revealed by EL at small reverse bias (~5 V), the enhanced aluminum and oxygen concentration is revealed. Such breakdowns can be located inside the depletion region because they are not revealed by the EBIC or LBIC methods. Breakdowns revealed by EL at larger bias correlate well with extended defects in the EBIC and LBIC images.