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Table 3 Fitting parameters for EIS data

From: Enhanced Power Conversion Efficiency of Perovskite Solar Cells with an Up-Conversion Material of Er3+-Yb3+-Li+ Tri-doped TiO2

Solar cells

Rs

Rco

Rrec

Cco

CPE-T/F

CPEμ-P

30NR-D

34.1

10.3

31.2

1.5E-7

5.9E-6

0.80

30NR-D with UC-TiO2

31.5

9.3

46.8

1.8E-7

5.5E-5

0.61

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