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2017 ; 10
(4
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Optical Design of Textured Thin-Film CIGS Solar Cells with Nearly-Invisible
Nanowire Assisted Front Contacts
#MMPMID28772750
Deelen JV
; Omar A
; Barink M
Materials (Basel)
2017[Apr]; 10
(4
): ä PMID28772750
show ga
The conductivity of transparent front contacts can be improved by patterned
metallic nanowires, albeit at the cost of optical loss. The associated optical
penalty can be strongly reduced by texturization of the cell stack. Remarkably,
the nanowires themselves are not textured and not covered in our design. This was
shown by optical modeling where the width of the nanowire, the texture height and
the texture period were varied in order to obtain a good insight into the general
trends. The optical performance can be improved dramatically as the reflection,
which is the largest optical loss, can be reduced by 95% of the original value.
The spectra reveal absorption in the Cu(In,Ga)Se? (CIGS) layer of 95% and
reflection below 2% over a large part of the spectrum. In essence, a virtually
black CIGS cell stack can be achieved for textured cells with a metal nanogrid.
Moreover, it turned out that the ratio between the width of the nanowire and the
height of the texture is a critical parameter for optical losses.