Can i use Copper Oxide to make a Home Made Peltier?

Here's the site http://sparkbangbuzz.com/copper-oxide-te/copper-oxide-gen3.htm .  i thought that i can use Copper(I) Oxide to make a Peltier Module. Peltiers are made up of semiconductor materials like bismuth telluride. 

The peltier affect is fairly common effect among many metals. Problem is they are unusable. Bismoth Telluride is the best for making a peltier and even than the efficiency is vary low.