doping level Nb (cm−3) | Conversion efficiency (%) under moderate concentration (C = 50 Suns) | Conversion efficiency (%) under normal illumination (C = 1 Sun) |
1013 | 30.79 | 18.76 |
5 × 1013 | 26.62 | 16.02 |
1014 | 24.67 | 14.74 |
5 × 1014 | 19.80 | 11.54 |
1015 | 17.57 | 10.09 |
5 × 1015 | 12.18 | 6.69 |
1016 | 9.87 | 5.31 |
Variation rate (%) | 67.94 | 71.70 |