Dye-sensitized solar cell including a porous insulation substrate and a method for producing the porous insulation substrate

A solar cell comprising a porous electrically-insulating substrate (4) made of microfibers, and at least one conducting layer (3) comprising conductive particles, wherein

• the porous insulation substrate (4) is configured to block conductive particles printed on one side of the substrate (4) from seeping through to the other side of the substrate (4) and comprises a sheet (5) of nonconductive woven microfibers and a layer (6) of nonconductive non-woven microfibers disposed on the sheet (5) of woven microfibers on a first side of the sheet (5),
• the layer (5) of woven microfibers comprises yarns of woven microfibers separated by holes (14) therebetween,
• the layer (6) of non-woven microfibers has parts (16) deposited in and protruding into said holes (14) between the yarns of the woven microfibers layer (5),
• the thickness of the layer (6) of non-woven microfibers varies in dependence on the locations of the holes (14) in the layer (5) of woven microfibers such that the layer (6) of non-woven microfibers is thicker (16) in said holes (14) and thinner (17) on top of the yarns of the layer (5) of woven microfibers,
• diameter of the microfibers in the layer (6) of nonwoven microfibers is smaller than diameter of filaments in the layer (5) of woven microfibers, with the nonwoven microfibers accumulating in the holes (14) between the yarns of woven microfibers and blocking the holes (14), and
• the at least one conducting layer (3) is disposed on the layer (6) of nonconductive non-woven microfibers.