Hi @muhamed.shafeeq, in your simulation all the recombination mechanisms are turned off. As a result the reverse bias current is almost zero. The value of the reverse bias current is so small that it is comparable or even lower than the accuracy level of the gummel solver. In such a case the current value at the contact where non-zero bias is applied can be inaccurate. However the current at the contact where the applied bias is zero should be more accurate. So in your present setup the current at the cathode contact would be the accurate one.
When you enable the common recombination mechanisms however, the reverse current is large enough that the solver will give you accurate values at both contacts (you may need to increase the solver accuracy to say 1e-7 as shown below).
Regarding the result in the charge monitor, it is supposed to provide you with the electron and hole density (n and p) only (and total charge if you enable that option). To get other properties you need other monitors for example your bandstructure monitor will give you the band profile. Note that when you have a voltage sweep the bandstructure monitor initially plots a surface plot so you will have to switch to a line plot (shown below). Also shown is how you can look at the band diagram at different voltages (by using the slider).
Unfortunately there is no monitor for doping (you can see the doping profile from the results at the CHARGE solver region).