Interface junction at anatase/rutile in mixed-phase TiO2: Formation and photo-generated charge carriers properties

► Better understanding of the interface junction between anatase and rutile TiO2. ► Kelvin probe results revealed the formation of built-in field at the interface. ► The characteristics of photo-generated charge carriers were examined by SPV. ► The dynamics of photo-generated charge carriers were examined by TPV. ► The role of the interface junction was further testified through SPV and TPV.