Stacked photovoltaic device and production method

• Main Authors: WU, Zhao, XU, Chen, LI, Zifeng
• Format: Patent
• Language: English
• Published: 23.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

A stacked photovoltaic device and a production method, relating to the field of photovoltaic technology. The stacked photovoltaic device comprises: an upper battery cell (1) and a lower battery cell (2), and a tunnel junction (3) located between the upper battery cell (1) and the battery cell (2); the lower battery cell (2) is a crystalline silicon cell; the tunnel junction (3) comprises: an upper crystalline silicon layer (31), a lower crystalline silicon layer (32) and an intermediate layer (33) located between the upper crystalline silicon layer (31) and the lower crystalline silicon layer (32); the upper crystalline silicon layer (31), the lower crystalline silicon layer (32) and the intermediate layer (33) are in direct contact, and the doping types of the upper crystalline silicon layer (31) and the lower crystalline silicon layer (32) are opposite; the doping concentration of the upper crystalline silicon layer (31) at the interface with the intermediate layer (33) and the doping concentration of the lower crystalline silicon layer (32) at the interface with the intermediate layer (33) are both greater than or equal to 10