How to know the conductivity of metal-semiconductor oxide (either p-type or n-type) from the IV characteristics nature?
You just need a light source to shine on the semiconductor electrode.
- Electrode should be made on transparent conducting oxide.
- Just make a thin film electrode and then illuminate it with light and check for LSV.
- n-type semiconductor will give high photocurrent density in oxidizing potential.
- p-type will give higher photocurrent density in the reducing potential region.
The conductivity type (p-type or n-type) of a metal-semiconductor oxide can be determined by analyzing the nature of its current-voltage (I-V) characteristics. Here are some general guidelines:
For p-type conductivity:
The I-V curve is typically a straight line, with a positive slope.
The resistance decreases with increasing temperature.
For n-type conductivity:
The I-V curve is non-linear, with a decreasing slope at higher voltages.
The resistance increases with increasing temperature.
It's important to note that the I-V characteristics of a metal-semiconductor oxide can also depend on other factors such as doping concentration, surface states, and film quality. To obtain accurate conductivity type information, additional analysis such as Hall effect measurements or capacitance-voltage measurements may be needed
Mohit Kumar Thank you for the comment. I have done on a silicon substrate with a metal contact on it and the result is attached below. D1 is the device as prepared and D2 is the sample annealed at a particular temp. So, i want to know whether my material is p-type or n-type
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