The invention discloses a local aluminum
back surface field solar battery with two diaphanous faces. The aluminum
back surface field solar battery comprises a
silicon substrate, an emitting
electrode, a front antireflection passive film, a front
electrode, a back passive film, a
back surface field and a back
electrode, wherein the emitting electrode, the front antireflection passive film and the front electrode are arranged on the front face of the
silicon substrate, and the back passive film, the back
surface field and the back electrode are arranged on the back face of the
silicon substrate. The back
surface field is a local aluminum back
surface field, a hole or a groove is formed in the back passive film, the area where the hole or the groove is formed is covered with linear
aluminum paste, partial back passive film is reserved not to be covered with the
aluminum paste, and the local aluminum back surface field is formed in the area where the hole or the groove is formed after
sintering. The local aluminum back surface field is communicated with the back electrode. The back passive layer (film) of the
solar battery is not completely covered with the
aluminum paste, the battery can absorb part of incident light or
scattered light on the back, the current of the battery and the current of components are increased, and therefore the
photoelectric conversion efficiency of the battery and that of the components are improved. The invention further discloses a preparation method for the local aluminum back surface field solar battery with the two diaphanous faces.