I am using source measurement unit to plot i-v value of nanocomposite samples, but i am not getting proper results. Please suggest me better procedure to get proper results.
Hello Krishnanand ..
How are you connecting the SMU to the sample in order to perform the measurement? I assume you are using a 'four point probe"/"Kelvin" setup. What do you mean by "not getting proper results" - please can you be more specific?
Often the issue is related to making a good quality connection to the test instrument. If you are using micropositioners with needle probes it is very important you use a microscope to ensure that contact is made and the needles do not pierce strate through the test layer.
For very delicate surfaces I sometimes purposefully (and carefully) bent the end of the probe needle to form a hook-like shape. This way, the needle can 'skate' slightly on contact with the delicate surface and in my experience was less likely to pierce through the layer.
I also attach a document from Keysight technologies that you may find useful.
Thanks a lot @Jules Lloyd Hammond and @Azadeh Soroudi , for your valuable advice.
1) you should have electrodes which can be prepared by evaporating aluminum
A well defined shape (circular) whose area can be determined easily.
2) You must have top and bottom electrodes on either side of your polymer sheet.
Both the top and bottom electrodes should be perfect aligned one over the other.
3) Must know the area of the electrode, and thickness of the polymer.
4) Apply some DC volts and measure the current.
5) You can then calculate the resistivity.
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