%0 Journal Article %A Martil De La Plaza, Ignacio %A González Díaz, Germán %A Olea Ariza, Javier %A Prado Millán, Álvaro Del %T Sub-bandgap external quantum efficiency in Ti implanted Si heterojunction with intrinsic thin layer cells %D 2013 %@ 0021-4922 %U https://hdl.handle.net/20.500.14352/33557 %X In this work we present the manufacturing processes and results obtained from the characterization of heterojunction with intrinsic thin layer solar cells that include a heavily Ti ion implanted Si absorbing layer. The cells exhibit external circuit photocurrent at,photon energies well below the Si bandgap. We discuss the origin of this below-bandgap photocurrent and the modifications in the hydrogenated amorphous intrinsic Si layer thickness to increase the open-circuit voltage. %~