TY  - JOUR
AU  - Bittkau, Karsten
AU  - Hoffmann, André
AU  - Paetzold, Ulrich
AU  - Carius, Reinhard
TI  - Broadening of Light Coupling to Waveguide Modes in Solar Cells by Disordered Grating Textures
JO  - Applied Sciences
VL  - 7
IS  - 7
SN  - 2076-3417
CY  - Basel
PB  - MDPI
M1  - FZJ-2017-05791
SP  - 725
PY  - 2017
AB  - We investigated the light coupling to waveguide modes in nanophotonic thin-film solar cells exhibiting a tailored disordered grating texture by rigorous optical simulations. Such disordered nanophotonic light trapping concepts have demonstrated enhanced short-circuit current density compared to ordered nanophotonic thin-film solar cells. This observation is commonly explained by a spectral broadening of the resonant light coupling to waveguide modes. In this work, we investigated the origin of this spectral broadening. We identified two basic mechanisms that lead to a spectral broadening of the light coupling to waveguide modes: (1) the broadening of the wave vector transferred by the disordered interface texture and (2) the broadening of the waveguide mode due to the distortion of the wave guiding absorber layer. Depending on the type of disorder, the contribution from each of the mechanisms varies.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000407700400082
DO  - DOI:10.3390/app7070725
UR  - https://juser.fz-juelich.de/record/836732
ER  -