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.

CdTe THIN-FILM SOLAR CELLS 639<br />

800<br />

700<br />

Temperature<br />

[°C]<br />

600<br />

500<br />

400<br />

Ohata 1973<br />

Nunoue 1990<br />

Moon 1992<br />

McCandless 2001<br />

300<br />

0.0<br />

0.2<br />

0.4<br />

0.6<br />

0.8<br />

1.0<br />

x in CdTe 1−x S x<br />

Figure 14.14 CdTe–CdS pseudobinary phase diagram. (Data listed in order from References<br />

[73, 140, 145, 148])<br />

The formation of CdTe 1−x S x and CdS 1−y Te y alloys in the absorber layer occurs<br />

by interdiffusion between CdS and CdTe during CdCl 2 treatment in air [135, 204]. Diffusion<br />

of CdTe into CdS can reduce the transmissive properties of the window from<br />

500 to 650 nm, but is mitigated by heat treatment of the CdS layer prior to CdTe deposition<br />

to increase CdS grain size and density. However, diffusion of CdS into CdTe<br />

is a faster process and is more difficult to control, especially for cell structures with<br />

ultrathin,

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

Saved successfully!

Ooh no, something went wrong!