Not all polymers are plastics, but all plastics are polymers. And organic polymer plastics, known mostly for being insulators, in some cases make excellent conductors and semiconductors. The term “all-polymer semiconductor” sounds almost like an oxymoron. Plastic is generally considered a poor medium for conducting electricity and an excellent material to resist the flow of electric current and magnetism, which is why it’s used as insulation for cables, casings and sockets.
