N-type local aluminum back crystalline silicon solar cell

The utility model discloses an N-type local aluminum back crystalline silicon solar cell. An N-type silicon sheet is used as a base body on which a silver electrode, a silicon nitride AC coating, a phosphor diffusion layer, a silicon base body, a passive film, an aluminum layer and an emitter junction are successively laminated from top to bottom. Dot matrix or line matrix-shaped images are arranged on the passive film. The emitter junction formed by aluminum paste in a sintered manner contacts local area of the silicon base body via the images on the passive film. According to the utility model, via the combination of back face reversion layer passivation technology and local aluminum back junction; the emitter junction and the back face are metalized; effects on the silicon sheet base body imposed by the high-temperature boron expansion are eliminated; production cost is greatly reduced; energy consumption is reduced; environmental pollution is reduced; and the solar cell is characterized by high efficiency