According to information from the State Intellectual Property Office, Tongwei Solar (Chengdu) Co., Ltd. applied for a patent called “Heterojunction Solar Cell and Its Preparation Method, Photovoltaic Module”, Publication No. CN121728834A, and the application date is February 2026.
Patent abstract shows that the present application relates to the field of solar cells, and discloses a heterojunction solar cell, a preparation method thereof, and a photovoltaic module. The heterojunction solar cell comprises: a substrate, the substrate has a light receiving surface and a backlight surface disposed opposite to each other, and a first passivation layer, a first doped silicon layer and a first electrode are sequentially disposed on the light receiving surface; wherein the first passivation layer comprises a first passivation sub-layer, the first doped silicon sub-layer comprises a first doped silicon sub-layer, and the first doped silicon sub-layer is disposed on a side of the first passivation sub-layer away from the substrate, the flow ratio of silane to hydrogen for preparing the first passivation sub-layer is 1:15 to 1:35, and the flow ratio of silane to oxygen-containing gas for preparing the first doped silicon sub-layer is 1:0.3 to 1:0.35. The heterojunction solar cell of the present application can ensure the passivation effect of the passivation layer while improving the anti-ultraviolet performance.
Tianyan check data show that Tongwei Solar (Chengdu) Co., Ltd., founded in 2011, is located in Chengdu. It is an enterprise mainly engaged in the production and supply of electric power and heat. The registered capital of the enterprise is 5400 million RMB. Through the big data analysis of Tianyan Zha, Tongwei Solar Energy (Chengdu) Co., Ltd. participated in 387 bidding projects, with 15 trademark information and 1731 patent information on property clues. In addition, the enterprise also has 865 administrative licenses.
