The invention discloses a novel solar cell. The solar cell comprises a mesoscopic perovskite solar cell, thermoelectric cells and a radiator, which are stacked in sequence, wherein the mesoscopic perovskite solar cell and the thermoelectric cells are integrated by bonding or respectively depositing different P type and N type thermoelectric materials on a counter electrode of the mesoscopic perovskite solar cell through evaporation and deposition or growth technologies; and the mesoscopic perovskite solar cell is connected to the thermoelectric cells in series or in parallel. The invention also discloses a preparation method of a stack device for the solar cell and the thermoelectric cell. According to the solar cell and the preparation method thereof, through adoption of the brand-new structural design, the mesoscopic perovskite solar cell and the inorganic thermoelectric cells are stacked and integrated, and the corresponding preparation method is adopted to integrate, so that through the prepared solar cell, the influence on the service life of the device is avoided, the service life and the stability of the solar cell are improved, and more important, the utilization rate of the solar power is greatly improved.