Benzothiophene is an aromatic organic compound with the molecular formula C8H6S and a naphthalene-like odor. Benzothiophenes are used in research as a starting material for the synthesis of larger, often biologically active structures. It exists in medicinal chemical structures such as raloxifene, zileuton, and sertaconazole, and can also be found in BTCP. It is also used to make dyes such as thioindigo.
The most common type of organic photodetector is the organic photodiode (OPD). The photodiode has a simple structure in which an active layer is sandwiched between a transparent electrode and a metal electrode. In contrast to OLEDs, organic photodiodes (OPDs) utilize the organic semiconductor to absorb incident light and convert it to electric current. The structure and working principle are more like organic solar cells. Among the various organic photodetectors, organic photodiodes (OPDs) have been the most widely studied due to their fast response, high sensitivity, and full use of the existing research base of organic photovoltaics (OPVs).