Although alcohol will not prevent more mold from growing back, it will kill any existing mold and mold spores. Alcohol is an effective alternative to killing mold in places that you are unable to use bleach. After using either alcohol or bleach to kill the mold, the underlying moisture problem must be fixed or mold will continue to grow back.
Any form of alcohol, including vodka and rubbing alcohol will kill mold and are cheaper than other alternatives. For surface that will become damaged from prolonged moisture of cleaning solutions, alcohol is a great alternative because how rapidly it will dry.