Three-Dimensional Dirac Semimetal/Organic Thin Film Heterojunction Photodetector With Fast Response and High Detectivity

As a typical three-dimensional Dirac semimetal (3D DSM), Cd 3 2 possess ultrahigh carrier mobility, high level of full spectral absorption, fast electron transmission speed, and photocurrent response, which enable wide applications in infrared photodetector. However, the large dark current detector based on thin film limits application small response. Hence, we demonstrated heterojunction photodetectors n-type 3D DSM (pristine Zn doped) p-type organic (PbPc) by depositing PbPc using thermal deposition method. These can detect radiation wavelength from 405 to 1,550 nm at room temperature. It is remarkable that this photodetector exhibits detectivity (3.95 × 10 11 Jones) response time (160 ?s) under bias voltage, significantly improved vs. -based devices. The excellent performances are attributed strong built-in electric field interface p-n junction, beneficial for efficient photocarriers collection transportation. results show DSM/organic has performance photodetectors. By combining with form heterojunction, it provides feasible solution high-performance