If I test the nip solar cell over the voltage sweep of -1.1V to 0.1V, with step size of 0.1V. Should I reverse the values of the voltage sweep (0.1V to -1.1V)with step size of 0.1V, to check on hysteresis?
Yes sir, to thoroughly investigate and assess hysteresis in a solar cell, it's a good practice to perform voltage sweeps in both the forward and reverse directions. In your case, where you initially swept the voltage from -1.1V to 0.1V with a step size of 0.1V, it's recommended to follow this with a reverse voltage sweep from 0.1V back to -1.1V with the same step size of 0.1V. This approach allows you to capture and analyze hysteresis effects in the solar cell's current-voltage (IV) characteristics.
Here's how this procedure helps in evaluating hysteresis:
1. Forward Sweep (From -1.1V to 0.1V):
- This measures the IV curve as the voltage increases from negative to positive values.
- You observe the response of the solar cell as it transitions from reverse bias to forward bias.
2. Reverse Sweep (From 0.1V to -1.1V):
- This measures the IV curve as the voltage decreases from positive to negative values.
- It helps to capture any hysteresis effects that may be present when the cell switches from forward bias to reverse bias.
By comparing the IV curves obtained during both the forward and reverse sweeps, you can identify and quantify any hysteresis effects. Hysteresis is typically observed as differences in current values at the same voltage points between the two sweep directions. This information is valuable for understanding the behavior of the solar cell under different operating conditions and can guide efforts to mitigate hysteresis if necessary.
Make sure to maintain consistent measurement conditions, such as light intensity and temperature, during both sweeps for accurate and meaningful comparisons. Additionally, repeating the measurements multiple times and averaging the results can help ensure the reliability of your findings regarding hysteresis in the nip solar cell.
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