ADEM Publications, Presentations and other output
ADEM--14-085
Title: The Nature and the Kinetics of Light-Induced Defect Creation in Hydrogenated Amorphous Silicon Films and Solar Cells |
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Author(s) | ||
Identification
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ISBN
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DOI
10.1109/JPHOTOV.2014.2349655 |
Publication date
2014-11-01 |
Number of pages
6 |
Full text |
Abstract
The nature and the kinetics of light-induced defect
creation in hydrogenated amorphous silicon (a-Si:H) films and solar
cells are investigated by means of Doppler broadening positron
annihilation spectroscopy, Fourier transform photocurrent spectroscopy,
and J–V characterization. There is a strong correlation
between the open volume deficiencies in a-Si:H and the Staebler–
Wronski effect (SWE). The carrier generation and recombination
profiles in the absorber layer are spatially correlated, and the recombination
due to defects in the top and bottom parts of the
absorber layer is different. Furthermore, the various defect distributions
in the bandgap have different defect creation kinetics. It
is demonstrated that the SWE defect formation kinetics in a solar
cell are very complex and can impossibly be described by one time
scaling ∼tβ as is often claimed. |