TY  - JOUR
AU  - Smeets, Michael
AU  - Smirnov, Vladimir
AU  - Bittkau, Karsten
AU  - Meier, Matthias
AU  - Carius, Reinhard
AU  - Rau, Uwe
AU  - Paetzold, Ulrich W.
TI  - Angular dependence of light trapping in nanophotonic thin-film solar cells
JO  - Optics express
VL  - 23
IS  - 24
SN  - 1094-4087
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2015-06225
SP  - A1575
PY  - 2015
AB  - The angular dependence of light-trapping in nanophotonic thin-film solar cells is inherent due to the wavelength-scale dimensions of the periodic nanopatterns. In this paper, we experimentally investigate the dependence of light coupling to waveguide modes for light trapping in a-Si:H solar cells deposited on nanopatterned back contacts. First, we accurately determine the spectral positions of individual waveguide modes in thin-film solar cells in external quantum efficiency and absorptance. Second, we demonstrate the strong angular dependence of this spectral position for our solar cells. Third, a moderate level of disorder is introduced to the initially periodic nanopattern of the back contacts. As a result, the angular dependence is reduced. Last, we experimentally compare this dependence on the angle of incidence for randomly textured, 2D periodically nanopatterned and 2D disordered back contacts in external quantum efficiency and short-circuit current density.
LB  - PUB:(DE-HGF)16
C6  - pmid:26698805
DO  - DOI:10.1364/OE.23.0A1575
UR  - https://juser.fz-juelich.de/record/256261
ER  -