Perovskite-back contact crystalline silicon laminated solar cell

Abstract

The invention aims to disclose a perovskite-back contact crystalline silicon laminated solar cell. The perovskite-back contact crystalline silicon laminated solar cell adopts a double-junction laminated structure, the bottom battery is a back contact crystalline silicon solar cell, and the top battery is a perovskite solar cell; the back contact solar cell is a back junction structure, and sequentially includes an electrode, a back surface passivation layer, a P+ / n+ region, a crystalline silicon substrate, a front surface structure and a front surface passivation layer from bottom to top; andthe perovskite solar cell is prepared on the front surface of the crystalline silicon substrate. Compared with the prior art, the double-junction laminated structure is adopted, and through the combination of the back contact crystalline silicon solar cell and the perovskite solar cell, the utilization of light energy can be maximized, the open circuit voltage and short circuit current of the solar cell can be increased, and the efficiency of the solar cell can be improved; and the scheme of the invention is simple in preparation process, has good combination with a production line, can effectively control the manufacturing cost of the solar cell, and achieves the purpose of the invention.

Description

technical field [0001] The invention relates to a solar cell, in particular to a perovskite / back contact crystal silicon laminated solar cell. Background technique [0002] Due to the wide distribution of the solar spectrum, single-junction perovskite cells can only absorb photons higher than their forbidden band width, making the conversion of light energy into effective electrical energy less efficient, which directly affects the S-Q efficiency limit of perovskite cells. The multi-junction stack structure of solar cells can maximize the use of light energy, which is one of the ways to break through the limit of photoelectric conversion efficiency. [0003] Since perovskite materials absorb better in green and blue light, and crystalline silicon has excellent absorption in red and infrared light, combining the two can maximize light absorption and increase power generation. Therefore, perovskite / crystalline silicon stacked cells have gradually entered the field of vision o...

AI Technical Summary

Problems solved by technology

However, gallium arsenide batteries, heterojunction batteries, etc., and perovskite stacked batteries have the characteristics of wide process, small opening, high cost, etc., and industrialization is difficult.