Using the phenomena known as Peltier's Effect, it can be inferred that if there be a junction of two condunctors joined together, then it absorbs heat on passing current through it. Therefore, it can cool its surrounding region. Thus, it can be used in a refrigerator. There is no noise as no motors are run.
It is also safer as the regular refrigerators cause damage to the ozone layer by releasing harmful gases.
However, one limitation is that with the current technology, the efficiency of such refrigerators is rather low.