Abstract
We report on the charge carrier confinement of the hematite and Hematite/Molybdenum di-telluride (α-Fe2O3@MoTe2) nanocomposites with special focus on the formation and role of interface states. X-ray diffraction (XRD) data confirms the existence of α-Fe2O3 in trigonally distorted rhombohedral while the MoTe2 in 2H hexagonal phase. Interfacial behavior and local chemical structure of the α-Fe2O3 and α-Fe2O3@MoTe2 nanocomposites were observed from the Mössbauer spectroscopy data. The hyperfine field splitting of the composite sample confirms the existence of the Fe3+ ions in two different octahedral environments, where 10% of surface Fe ions are in chemical interaction with the MoTe2 layers thereby making interfacial states. UV–Vis diffuse reflectance spectroscopy was employed to determine the band gap and band tail states, which are the key parameters in controlling the localization behavior. The conductivity, relaxation behavior and charge carrier confinement were observed by employing impedance spectroscopy.
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