New Core‐Expanded Naphthalene Diimides for n‐Channel Organic Thin Film Transistors

Four classes of core-expanded naphthalene diimides (1a, 1b, 2a, 2b, 3 and 4) that bear different electron-deficient sulfur heterocycles were designed and synthesized. The solution-processed thin films of 1a, 2a, 3 and 4 operated well in air as n-channel o