▎ 摘　　要

NOVELTY - The detector has optical fiber side wall metal electrodes that are connected with optical fiber end surface metal electrodes. A van der Waals heterojunction structure is positioned at an end surface of an optical fiber and sequentially provided with a tungsten disulfide film, a molybdenum disulfide film and a graphene film from bottom to top. The optical fiber end surface metal electrodes are connected with the graphene film at two ends of the van der Waals heterojunction structure. The optical fiber side wall metal electrodes and the optical fiber end surface metal electrodes are symmetrically distributed with respect to axis of the optical fiber. USE - Van der Waals hetero-junction based photoelectric detector for use in an optical communication field and an optical sensing field. ADVANTAGE - The detector realizes weak light detection function of visible near infrared wave band and strong light detection function of full wave band, and has better stability, better anti-interference capability and wide application prospect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a Van der Waals hetero-junction based photoelectric detector preparation method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a Van der Waals hetero-junction based photoelectric detector.