How Do Minority and Majority Carriers Affect Current in a PN Junction?

[jalebi]

In a PN junction under reverse bias, a small bit of current exists due to the movement of minority carriers. Under equilbrium, no current passes through. Am I right in thinking that the movement of minority carriers under equilibrium is canceled by the little bit of majority carriers that passes (resulting in a net current of zero), and that under reverse bias, not enough majority carrier passes through to cancel out minority carrier movement? I couldn't find many sources that explained this aspect...

 

[dlgoff]

Here's a good site to explain P-N energy bands for Equilibrium, Forward and Reverse Bias:

http://hyperphysics.phy-astr.gsu.edu/hbase/solids/pnjun2.html"

Regards