Organic superconductor
These include the Bechgaard salts and Fabre salts which are both quasi-one-dimensional , and quasi-two-dimensional materials such as "k-BEDT-TTF2X" charge-transfer complex , "λ-BETS2X" compounds , graphite intercalation compounds and three-dimensional materials such as the alkali-doped fullerenes . 
<triplet> Bechgaard salt <subj> charge-transfer complex <obj> subclass of