Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

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Figure 4: XRD pattern of powder-B after 4 min of evaporation.
The transmission spectra of the InxSy films deposited on SLG from powder-A and powder-B are
presented in Fig. 5. No significant difference in transmission behavior of films deposited from the two
powders was observed. The optical transmission of as-grown ~30 nm thin InxSy film was found to be
70-90% above 500 nm, while ~ 60 nm thin layer was 50-70% transparent above 450 nm. The effect of
in-situ post-buffer deposition vacuum annealing (PBDVA) on the transmission behavior was also
studied on films deposited from powder-B. The InxSy layers evaporated from powder-B were found to
be optically stable as no significant change in the transmission behavior was noticed.
Figure 5: Optical transmission of ~30 nm and ~60 nm thick InxSy layers evaporated from powder-A
and powder-B: as-grown and after PBDVA treatment.
a b
Figure 6: SEM cross-section (a) and top view (b) of ~30 InxSy layer deposited on CIGS.
ATHLET, D. Brémaud, ETH Zurich Seite 99 von 288