I just cut them up and freeze them in zip lock bags. Now they will not be as crunchy as a fresh pepper, but they work just fine for things like chili, or sausage peppers onions, etc.
OK here is how I do it mostly with Bell peppers for cooking later when they are expencive.
Punch out the core and cut into 1/4's or smaller as you can always cut em smaller later on.
Let them dry off a bit or do it your self with a clean towel than spread them out on cookis sheets freeze and when frozen put in a gallon zip lock.
By freezing on a try first they won't all freeze together and that way you can pull out what you want even if it is just 1 or 2 pcs. @ a time. I will freeze a bushel of pepers cut up like that and put into several gal. size zip locks and it will last all year weather chopping of 1 or 2 pcs with eggs or doing a batch for Sausage and peppers.
For Chili's cut em up and dry them for soups and stews down the road. (We are drying Tomatoes in the oven right now just like we do oven jerky!