Difference between ohmic contact and schottky contact

[ralden]

Hi guys!, i want to know the advantages/disadvantages of using ohmic contact and schottky contact, because i will fabricate a photodiode (p-n junction) and lot of the articles say that ohmic contact is the best for this kind of device. But schottky contact rectify the signal which is more important if you want to have a high sensitive photodiode so guys, what is the best metal contact for photodiode? thanks in advance!

 

[Astronuc]

It depends on one's objective - "Schottky Contacts make good diodes, and can even be used to make a kind of transistor, but for getting signals into and out of a semiconductor device, we generally want a contact that is Ohmic. Ohmic contacts conduct the same for both polarities. (They obey Ohm's Law)."

http://www.cleanroom.byu.edu/ohmic-schottky.phtml