Fig. 2: Characterisations of the doped CuI thin films.
From: High-performance p-channel transistors with transparent Zn doped-CuI
a XRD patterns of the CuI thin films doped with different cations. b–d XRD patterns, XPS peak intensity ratios of Zn 2p to Cu 2p, and Tauc plots of the Zn-doped CuI films with Zn doping contents of 0–15 mol%. e, f AFM and TEM images (FFT pattern) of the bare and 5-mol%-Zn-doped CuI films (scale bar in HRTEM images is 2 nm). g, h UPS spectra of the secondary-electron onset and valence band regions and electronic energy level diagrams for the CuI:Zn thin films with different Zn2+ doping contents (0, 5, 10 mol%).
