Indications of short minority-carrier lifetime in kesterite solar cells

Solar cells based on kesterite absorbers consistently show lower voltages than those based on chalcopyrites with the same bandgap. We use three different experimental methods and associated data analysis to determine minority-carrier lifetime in a 9.4%-efficient Cu2ZnSnSe4 device. The methods are cr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2013-08, Vol.114 (8)
Main Authors: Repins, I. L., Moutinho, H., Choi, S. G., Kanevce, A., Kuciauskas, D., Dippo, P., Beall, C. L., Carapella, J., DeHart, C., Huang, B., Wei, S. H.
Format: Article
Language:English
Subjects:
kesterite
photovoltaic
PV
solar cells
SOLAR ENERGY
thin film
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Solar cells based on kesterite absorbers consistently show lower voltages than those based on chalcopyrites with the same bandgap. We use three different experimental methods and associated data analysis to determine minority-carrier lifetime in a 9.4%-efficient Cu2ZnSnSe4 device. The methods are cross-sectional electron-beam induced current, quantum efficiency, and time-resolved photoluminescence. These methods independently indicate minority-carrier lifetimes of a few nanoseconds. A comparison of current-voltage measurements and device modeling suggests that these short minority-carrier lifetimes cause a significant limitation on the voltage produced by the device. The comparison also implies that low minority-carrier lifetime alone does not account for all voltage loss in these devices.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4819849