A method for manufacturing a solar cell device (10a, 10b, 20, 40, 50, 60) having improved quantum efficiency comprising the steps of: - providing a diffusively reflective substrate (105, 205, 405, 505, 605) comprising a paper material or a textile material having a predetermined surface roughness; - attaching by lamination a transparent intermediary layer (104a, 104b, 204, 404, 504, 604) comprising a polymer layer to the diffusively reflective substrate (105, 205, 405, 505, 605) such that the transparent intermediary layer follows peaks and valleys of the surface of the substrate having the predetermined surface roughness without any air gap between the transparent intermediary layer and the diffusively reflective substrate and such that the surface on the opposite side of the interface between the transparent intermediary layer and the diffusively reflective substrate is smooth; wherein the diffusively reflective substrate reflects light diffusively when the transparent intermediary layer is attached to it; and - arranging transparent first (101, 201, 401, 501, 601) and second (102, 202, 402, 502, 602) electrode layers and a photocurrent generating layer (103, 203, 403, 503, 603) in a layer stack such that they overlap and the photocurrent generating layer (103, 203, 403, 503, 603) is arranged between the transparent first (101, 201, 401, 501, 601) and second (102, 202, 402, 502, 602) electrode layers; - arranging the layer stack on the transparent intermediary layer (104a, 104b, 204, 404, 504, 604), wherein the layer stack is arranged on the transparent intermediary layer (104a, 104b, 204, 404, 504, 604) by means of printing wherein the transparent intermediary layer (104a, 104b, 204, 404, 504, 604) is adjacent to the transparent first electrode layer (101, 201, 401, 501, 601) to mediate light between the diffusively reflective substrate (105, 205, 405, 505, 605) and the transparent electrode layer (101, 201, 401, 501, 601) such that part of the light incident on the diffusively reflective substrate is reflected into the photocurrent generating layer (103, 203, 403, 503, 603). - providing a diffusively reflective substrate (105, 205, 405, 505, 605) comprising a paper material or a textile material having a predetermined surface roughness; - attaching by lamination a transparent intermediary layer (104a, 104b, 204, 404, 504, 604) comprising a polymer layer to the diffusively reflective substrate (105, 205, 405, 505, 605) such that the transparent intermediary layer follows peaks and valleys of the surface of the substrate having the predetermined surface roughness without any air gap between the transparent intermediary layer and the diffusively reflective substrate and such that the surface on the opposite side of the interface between the transparent intermediary layer and the diffusively reflective substrate is smooth; wherein the diffusively reflective substrate reflects light diffusively when the transparent intermediary layer is attached to it; and - arranging transparent first (101, 201, 401, 501, 601) and second (102, 202, 402, 502, 602) electrode layers and a photocurrent generating layer (103, 203, 403, 503, 603) in a layer stack such that they overlap and the photocurrent generating layer (103, 203, 403, 503, 603) is arranged between the transparent first (101, 201, 401, 501, 601) and second (102, 202, 402, 502, 602) electrode layers; - arranging the layer stack on the transparent intermediary layer (104a, 104b, 204, 404, 504, 604), wherein the layer stack is arranged on the transparent intermediary layer (104a, 104b, 204, 404, 504, 604) by means of printing