Even better, is to minimize the need for post processing by learning how to do photography, and getting the shot mostly right when you release the shutter.
Any time you have a backlit subject you will need fill light of some type. You can use a reflector, or fill flash(s) (strobed light). Often fill flash is the only option because there is not enough light to reflect.
When you do use supplimental light, be it reflected or strobed, it is usually best if the light is not on the same axis as the lens, like directly from a popup, built-in flash or even from a hot showe mounted speedlight.
Photography is about using light. The more effective you are at using light, the better your photographs will look.