Ahn, Jongtae Kang, Ji-Hoon Park, Min-Chul Hwang, Do Kyung 2024-01-19T17:00:59Z 2024-01-19T17:00:59Z 2021-09-02 2020-08 0146-9592 https://pubs.kist.re.kr/handle/201004/118254 Two-dimensional (2D) layered van der Waals atomic crystals exhibit many fascinating properties. In particular, their dangling-bond-free nature enables different 2D materials to be stacked on the top of each other without restraint, thereby forming a heterostructure. In this study, a high-performance all 2D heterojunction photodiode with a graphene contact as an electrode is demonstrated. It exhibits an excellent electrical performance (ideality factor of 1.2 and rectification ratio of 104), a broad spectral photoresponse (from 450 to 980 nm), and a remarkable linearity with a linear dynamic range of 113 dB. Finally, a self-powered single pixel imager is demonstrated as a feasible optoelectronic application. English OPTICAL SOC AMER All 2D WSe2/MoS2 heterojunction photodiode and its image sensor application Article 10.1364/OL.399955 1 OPTICS LETTERS, v.45, no.16, pp.4531 - 4534 OPTICS LETTERS 45 16 4531 4534 N scie scopus 000564903500043 2-s2.0-85089502097 Optics Optics Article TRANSITION METAL OPTOELECTRONICS MoS2 WSe2 heterojunction photodiode image sensor 2D van der Waals materials