2026-02-13 01:55Summary of Conference Call Notes Industry Overview - The focus is on the application of tandem solar cells in space photovoltaic systems, highlighting the challenges and advancements in technology related to lightweight and flexible solar panels [1][2]. Key Points and Arguments 1. Challenges with Thin Silicon Cells: - Space photovoltaic cells require extreme weight reduction and flexibility, making ultra-thin silicon cells very fragile. The use of string welding can lead to mechanical stress and high-temperature welding issues, increasing the risk of silicon cell breakage and detachment under extreme temperature variations in space [1][2]. 2. Advantages of Tandem Structure: - The tandem structure allows for flexible connections of silicon cells, reducing the number of solder joints. This effectively disperses mechanical stress, minimizing the risks of hidden cracks and breakage [1][2]. 3. Increased Effective Power Generation: - The tandem structure can achieve zero spacing between solar cells, which enhances the effective power generation area for the same solar wing size [3]. 4. Historical Context: - The application of tandem structures in space photovoltaics is well-established, with the "Shijian-1" satellite launched in 1971 being an early example of a solar panel using a "comb-type" structure designed in China [4]. 5. Industry Feedback: - Leading North American renewable energy companies are currently using tandem solutions for ground photovoltaic modules. The production line for tandem components is reported to be more than twice the cost of conventional string welding lines, indicating significant market interest [4]. Company Highlights 1. ST Jingji: - The wholly-owned subsidiary, Shengcheng Photovoltaics, possesses competitive manufacturing technology for tandem components. It is noted for being the sole supplier of ground tandem production lines to a well-known North American company and has also supplied coating equipment to overseas space perovskite enterprises. The company holds a significant market share in North America, estimated to exceed 50% [4]. 2. Dike Co., Ltd.: - A leading company in photovoltaic silver paste, known for its R&D capabilities. It has nearly 100% market share in North America and has been promoting tandem adhesive products since 2019, leveraging its core patent advantages in conductive paste solutions [5]. 3. Debang Technology: - A core supplier of tandem conductive adhesives, with products widely used in leading photovoltaic companies such as Tongwei, Canadian Solar, and major North American renewable energy firms, holding a strong competitive position in the market [5]. 4. Juhe Materials: - A leading company in photovoltaic silver paste, developing copper paste products suitable for photovoltaic cells, currently undergoing testing with major clients and expected to benefit from the adoption of high/pure copper paste materials [5]. 5. Aotewei: - A leading company in photovoltaic component equipment, with key products including string welding machines and silicon wafer sorting machines. The company has also made advancements in tandem equipment, achieving high precision and yield rates [6]. Additional Important Insights - The integration of semiconductor material assets by companies is seen as a solution to domestic supply chain issues, addressing critical bottlenecks in the industry [5][6].