20.10.2018 Views

knjiga solarna energija dobra

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

640 CADMIUM TELLURIDE SOLAR CELLS<br />

1.0<br />

Area-normalized intensity<br />

0.8<br />

0.6<br />

0.4<br />

0.2<br />

CdTe<br />

As deposited<br />

CdTe 0.94 S 0.06<br />

XdTe 0.94 Σ 0.06<br />

10 min<br />

40 min<br />

20 min<br />

0.0<br />

76.0<br />

76.2<br />

76.4<br />

76.6<br />

2-q<br />

[deg]<br />

76.8<br />

77.0<br />

77.2<br />

Figure 14.15 Time-progressive X-ray diffraction line profiles for the (511)/(333) reflection for<br />

PVD CdTe/CdS thin-film structures deposited at 250 ◦ C and treated in CdCl 2 :Ar:O 2 vapor at 420 ◦ C.<br />

Positions of pure CdTe and CdTe 1−x S x alloy with x = 0.06 are indicated<br />

Xtal<br />

Subst<br />

Super<br />

10 −12 1.3 1.35 1.4 1.45 1.5 1.55<br />

D b<br />

[cm 2 /s]<br />

10 −13<br />

10 −14<br />

Slope ∼3.0 eV<br />

10 −15<br />

Figure 14.16 Arhennius plot of bulk-diffusion coefficients versus inverse of treatment temperature<br />

for values obtained by modeling XRD line profiles of thin-film CdTe/CdS samples and from AES<br />

depth profiling of S distribution in CdTe single crystal [73]<br />

10 3 /T<br />

[K]

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!