Charging voltage Vc (V) | |||
Exposure time (min) | Measurement times | Average | SD |
1 | 5 | 3.19 | 0.006 |
2 | 5 | 3.01 | 0.003 |
3 | 5 | 2.84 | 0.004 |
4 | 5 | 2.71 | 0.002 |
5 | 5 | 2.53 | 0.003 |