# Non-linear conductivity of ZnO

1. Oct 12, 2012

### eric336

I want to understand the conductivity of ZnO. I know it is non-linear (that's why it is used in surge arrester to begin with), but can anyone enlighten me on why it is non-linear? Is it the function of electric field, current, or anything? I'd appreciate if you can provide the expression of conductivity.

2. Oct 13, 2012

### ChaseRLewis73

ZnO is a semiconductor material that naturally is n-type without doping. Thus it will have a good conductivity because it allows easy transitions to the conduction band (what it means to be n-type).

These slides go over it