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DALLAEVA, D. TOMÁNEK, P. ŠKARVADA, P. GRMELA, L.
Original Title
Realization of microscale detection and localization of low light emitting spots in monocrystalline silicon solar cells
Type
journal article in Web of Science
Language
English
Original Abstract
We report on detection and localization of imperfections in silicon solar cell bulk and surface with sub-micrometer resolution. To obtain this resolution, a family of imaging techniques including SNOM, SEM and AFM is often separately used for this purpose. In this paper we combine several of these proximal methods together, because each of them brings complimentary information about the imperfection. First, we note that SNOM images often contain distortions due to the interaction of the probe tip and sample. Therefore, we look for the possibility to circumvent this weakness and obtain more realistic images. In our experiments, we take advantage of the fact that defects or imperfections in silicon solar cell structures under reverse-bias voltage exhibit microscale low light emitting spots, and we apply an improved SNOM measurement to localize these spots. As a result, this system allows a localization and measurement of low light emission on microscale. Consequently, the size and shape of imperfections can also be determined.
Keywords
solar cell, silicon, monocrystalline emitting spot, detection, localization, microscale
Authors
DALLAEVA, D.; TOMÁNEK, P.; ŠKARVADA, P.; GRMELA, L.
RIV year
2015
Released
6. 1. 2015
Publisher
SPIE
Location
Bellingham, USA
ISBN
0277-786X
Periodical
Proceedings of SPIE
Year of study
9450
Number
State
United States of America
Pages from
94501O-1
Pages to
94501O-7
Pages count
7