Photodiode amplifier diode offset
In this circuit the junction is generating a photocurrent, and in the above circuit the op amp will generate just enough current through the feedback resistor to cancel the photocurrent such that the voltage across the junction is zero volts (in the ideal case.)  That's because any difference in voltage between the + and - inputs gets amplified by the very large voltage gain of the op-amp and the feedback serves to servo the voltage back to zero.  So the only offset you will have is the input offset voltage of the op-amp.

Note that this is not the fastest response circuit that you can get.  The junction capacitance is large with no bias, so if you need response speed you may want to explore a TIA with reverse bias of the photodiode.

Also, it's relatively uncommon for a photodiode to have 3 leads.  Are you sure it's a photodiode?