Table 1 Electrical parameters used for CsPb_0.75Sn_0.25IBr₂/Cs₂TiI₆ tandem solar cell, input to SCAPS − 1D simulator^{50,51,52,53,54,55,56,57,58,59,60}.

Thickness (nm)

50

50

100 − 1000

100–1000

100

100

Band gap (eV)

3.2

2.33

1.78

1.02

3

1.6

Electron affinity (eV)

4.26

3.72

3.7

4

2.45

3.4

Dielectric Permittivity

9

9

8

6.9

3

3

CB effective density of states (1/cm³)

2.2 × 10¹⁸

2.2 × 10¹⁸

2 × 10¹⁸

4.96 × 10¹⁹

1 × 10¹⁹

2.2 × 10¹⁸

VB effective density of states (1/cm³)

1.8 × 10¹⁹

1.8 × 10¹⁹

5 × 10¹⁸

1.75 × 10¹⁹

1 × 10¹⁹

1.8 × 10¹⁹

Electron/hole thermal velocity (cm/s)

1 × 10⁷

1 × 10⁷

1 × 10⁷

1 × 10⁷

1 × 10⁷

1 × 10⁷

Electron/hole mobility (cm²/Vs)

20/10

0.013/0.013

20/20

0.236 /0.171

0.0002/ 0.0002

0.045/0.045

Donor density (1/cm³)

9 × 10¹⁶

9 × 10¹⁶

-

3 × 10¹⁹

-

-

Acceptor density (1/cm³)

-

-

-

3 × 10¹⁸

2 × 10¹⁸

1 × 10¹⁹

Total defect density (1/cm³)

10¹⁵

10¹⁵

10¹⁵

10¹⁴

10¹⁴

10¹⁵