I have a thin semiconductor film deposited on an isolating substrate. I would like to check different metals to find out do they form the ohmic contact or Schottky barrier.
What is the best way to do that?
I know that ohmic contacts show a linear I-V curve. But how to measure it? Should I deposit small dots of different metal on top of the film and measure the I-V curve? How large should be the dots? And what distance between them?
Or should I deposit my semiconductor film on a conductive substrate and measure the I-V through the film?
In most of the papers people just write – we measured the I-V curve of this film and such metal, but what design do they use?