doping level Nb (cm−3) | Open-circuit voltage (mV) under moderate illumination (C = 50 Suns) | Open-circuit voltage (mV) under normal illumination (C = 1 Sun) |
1013 | 995.74 | 900.63 |
5 × 1013 | 1012.56 | 917.09 |
1014 | 1019.40 | 923.72 |
5 × 1014 | 1034.22 | 937.86 |
1015 | 1040.02 | 943.27 |
5 × 1015 | 1051.73 | 953.77 |
1016 | 1055.89 | 957.32 |
Variation rate (%) | 6.04 | 6.29 |