Deep-ultraviolet detectors based on oxygen-/fluorine-terminated (100) diamond

In this study, deep-ultraviolet detectors based on oxygen-/fluorine-terminated (100) diamond (O-/F-diamond) have been fabricated. Both of the O-/F-diamond surfaces have been formed on different areas of one (100) diamond sample by O2 and CF4 plasma. Pd has been evaporated on the O-/F-diamond surfaces to form Schottky contact, whose barrier heights have been investigated by X-ray photoelectron spectroscopy technique. Deep-ultraviolet detector based on F-diamond shows lower dark current than that based on O-diamond.