| abstract |
The invention discloses a back-contact perovskite solar cell, which comprises a bottom-up structure: 1) a conductive substrate; 2) a uniform electron transport layer; 3) a dielectric layer; 4) a metal layer; 5) a perovskite layer And there are several channels through the dielectric layer and the metal layer to contact the electron transport layer; 6) the protective layer of the perovskite layer; the conductive substrate adopts various TCO transparent conductive glasses, heavily doped crystalline silicon wafers, and metal sheets; The electron transport layer adopts ZnO, TiO2, PCBM; the thickness is generally 10nm～10um; the dielectric layer adopts Al2O3, SiO2, SiNx, the thickness is 10nm～2um; the metal layer adopts Au, Pt, Ag, Al; the thickness is 10nm～2um; Pore diameter 0.5 ~ 1.5um. The perovskite layer adopts organic metal halide semiconductor perovskite materials such as MAPbI3; the thickness is 100nm-20um. The protective layer is made of hydrophobic and anti-oxidation polymer. In order to effectively maintain the performance of the perovskite material and improve the stability of the battery; the back contact structure can effectively reduce the shading loss of the front electrode and improve the conversion efficiency of the battery. |