Fig. 2: Microstructure and phase composition of inkjet-printed Ag2Se-based films.
From: Fully inkjet-printed Ag2Se flexible thermoelectric devices for sustainable power generation
a XRD patterns of Ag2Se/Ag composite films annealed at 723 K. b Crystal structure of low-temperature β-Ag2Se phase. c Schematic diagram of film orientation growth. d SEM image of Ag2Se film. e SEM image of Ag2Se/15%Ag composite film. f HAADF-STEM image of the cross-section of Ag2Se film, and corresponding EDS elemental mapping, together with SAED pattern and HRTEM image. g High-resolution TEM image of Ag2Se/15%Ag composite film with the inset showing FFT images corresponding to Ag2Se grain and Ag grain. h XPS results of Ag 3d core-level spectra: h1 for Ag2Se; h2 for Ag2Se/15%Ag. i XPS results of Se 3d core-level spectra: i1 for Ag2Se; i2 for Ag2Se/15%Ag.
