Gaury, B.
and Haney, P.
(2017),
Charged Grain Boundaries and Carrier Recombination in Polycrystalline Thin-Film Solar Cells, Physical Review Applied, [online], https://doi.org/10.1103/PhysRevApplied.8.054026
(Accessed December 11, 2024)
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Charged Grain Boundaries and Carrier Recombination in Polycrystalline Thin-Film Solar Cells
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Abstract
We present analytical relations for the dark recombination current of a pn+ junction with positively charged columnar grain boundaries in the high defect density regime. We consider two defect state configurations relevant for positively charged grain boundaries: a single donor state and a continuum of both acceptors and donors. Compared to a continuum of acceptor+donor states, or to the previously studied single acceptor+donor state, the grain boundary recombination of a single donor state is suppressed by orders of magnitude. We show numerically that superposition holds near the open-circuit voltage Voc, so that our dark J(V) relations determine Voc for a given short circuit current Jsc. We finally explicitly show how Voc depends on the grain boundary defect state structure.Citation
Physical Review Applied
Volume
8
Issue
5
Pub Type
Journals
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Created November 13, 2017, Updated November 10, 2018