Pop them into the fridge: If you want to store your bananas correctly, you can certainly store them in the fridge. However, they should be ripe when you put them in as they will not ripen any further in the cool environment.
Can we put banana in fridge?
Put the bananas in the produce drawer of your refrigerator after they are fully ripe. Refrigeration slows the ripening process considerably, but does not stop it. According to Dole Bananas, storing ripe bananas in the refrigerator will preserve their delicious taste for longer, even though their peels may turn black.