Fig. 12. GNWs-based photovoltaic detectors (a) fabrication process of GNWs using the PEALD method; (b) schematic illustration of the device structure; (c)–(f) photoelectric detection performance of the device; Copyright © 2021, American Chemical Society (g) schematic representation of the 3D-Gr/2D-Gr/Ge heterojunction detector structure; (h) photoelectric response currents of the 3D-Gr/2D-Gr/Ge heterojunction detector at various 1550 nm light power levels; (i) response time of the 3D-Gr/2D-Gr/Ge heterojunction detector. Copyright © 2020, American Chemical Society.