With most aircraft I know the flight deck door can be opened without power from the inside. This means the possibility of opening the door by causing a short circuit or power failure on the cabin side of things is not possible. As a result, unlocking the flight deck door doesn't feature in emergency checklists.
Given a normal emergency, if such a thing exists, the captain is expected to deplane last via a rear passenger door and all other flight deck members are expected to zip off through a forward passenger door. But if that is not sensible or possible then you exit via sliding windows or an escape hatch.