“…[2,[4][5][6][7][8][9][10]. Therefore, many researchers focused on modification of GaAs MS devices with the organic interlayer to reveal the properties and exact description of current transport mechanism in contacts [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Researchers were used a different type polymeric or non-polymeric organic compounds as an interface layer such as poly(2-methoxy-5-(2/-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) [2], Rhodamine 101 [5], poly (3,4-ethylenedioxithiophene)-block-poly(ethylene glycol) (PEDOT) [6], perylene-monoimide (PMI) [7], Rhodamine-B (RhB) [8], 3,4,9,10-perylene tetra carboxylic dianhydride (PTCDA) [9], octadecylthiol (ODT) [10], N,N′-dimethyl-3,4,9,10-perylene tetra carboxylic diimide (DiMe-PTCDI) [13], dicarboxylic acid derivatives [14], phenol red [15], rubrene [16] and etc.…”