Patent ID: 7821001

Claim:
An organic transistor comprising: a source electrode; a drain electrode; a gate; an insulating layer disposed on the gate; a p-type organic compound layer disposed on the insulating layer; and an n-type organic compound layer disposed between the source electrode or the drain electrode and the p-type organic compound layer, an NP junction being formed between the n-type organic compound layer and the p-type organic compound layer, wherein an energy difference between a LUMO energy of the n-type organic compound layer and a Fermi energy of the source electrode or the drain electrode is about 2 eV or less and the LUMO energy of the n-type organic compound layer is greater than the Fermi energy of the source electrode or the drain electrode; and wherein an energy difference between the LUMO energy of the n-type organic compound layer and HOMO energy of the p-type organic compound layer is about 1 eV or less, wherein the n-type organic compound layer comprises fluoro-substituted 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA), cyano-substituted PTCDA, naphthalene-tetracaboxylic-dianhydride (NTCDA), fluoro-substituted NTCDA, cyano-substituted NTCDA, or hexanitrile hexaazatriphenylene (HAT).