Room temperature visible electroluminescence from SrTiO3/p+–Si heterostructure

Visible electroluminescence has been achieved from a device based on the SrTiO3/p+-Si heterostructure, in which the SrTiO3 film is deposited by a sol–gel process on silicon substrate. When applied with sufficient forward bias with the positive voltage connecting to the p+-Si, broad visible emissions peaking at ∼550 nm occur. The self-trapped excitons relevant to oxygen vacancies in SrTiO3 are proposed to be responsible for the visible emissions from the SrTiO3/p+-Si heterostructured device.