Fig. 2: Configuration and visible photoluminescence of BP–WSe2 heterostructures.
From: Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications
a–c Schematic (a), optical (b), and photoluminescence (PL) mapping (c) images of the BP–WSe2 heterostructure. The scale bar is 10 μm. d PL spectra of monolayer WSe2 and the BP–WSe2 heterostructure under an incident laser of 2.33 eV. The incident laser power is 4 μW
