Thai Chili Peppers -- how to preserve
I throw mine in the freezer. The flesh thins out a little (freezing dehydrates things), but as long as they're well wrapped, the flavor and definitely the heat remain intact. The flavor retention is better than drying or using a dehydrator, imho.
I've found pickling destroys the heat and of course, the vinegar changes the flavor dramatically.
Hope this helps. Enjoy!