Table 1 Scattering factors for electrons in forward direction for relevant atoms and corresponding ions in CIGS solar cells according to Weickenmeier et al., Rez et al. and Peng et al. [33–35]

Cu/Cu\(^{+}\)

0.55

0.63

0.33

0.45**

In/In\(^{3+}\)

1.03

1.06

0.46

0.29*

Ga/Ga\(^{3+}\)

0.70

0.71

0.22

0.18*

Se/Se\(^{2-}\)

0.72

0.73

0.95*

1.02*

Cd/Cd\(^{2+}\)

0.92

0.92

0.51

0.51

S/S\(^{2-}\)

0.52

0.52

0.65*

0.71*

Zn/Zn\(^{2+}\)

0.60

0.60

0.26

0.26

O/O\(^{2-}\)

0.20

0.20

0.35

0.41

CuInSe\(_{2}\)

14.8

15.5

13.3

13.7

CuGaSe\(_{2}\)

14.9

15.5

13.6

14.8

CIGS\(_{\mathrm{GGI=0.36}}\)

14.8

15.5

13.4

14.0

CdS

13.5

13.6

11.0

11.6

ZnO

16.1

16.2

12.2

13.5