The disclosure is related to organic semiconductor compounds including benzodithieno(3,2-b:2′,3′-d)thiophene (BDTT) and the derivatives of benzodithieno(3,2-b:2′,3′-d)thiophene. The organic compounds of the disclosure have high resistance to the oxidation and high electrical stability. Accordingly, the semiconductor device having an organic semiconductor layer made of the organic compounds of the disclosure has stable electrical performance, and the reliability of the semiconductor device is improved.