钙钛矿型光伏电池

Search documents
日本将支援企业研发叠层光伏电池
日经中文网· 2025-07-25 05:43
Core Viewpoint - Japan is expanding support for the development of next-generation photovoltaic (PV) cells, particularly focusing on tandem perovskite solar cells, which can enhance efficiency and reduce reliance on imports from China [1][2][3]. Group 1: Government Support and Objectives - The Japanese Ministry of Economy, Trade and Industry (METI) will use the "Green Innovation (GI) Fund" to subsidize the development of decarbonization technologies, including tandem perovskite solar cells [2]. - The support will begin in the fiscal year 2025, with a goal to establish manufacturing and mass production technologies by 2030 [2]. - METI requires supported companies to achieve a power conversion efficiency exceeding 30%, durability equivalent to traditional PV panels (20 years), and reduce residential power generation costs to below 12 yen per kilowatt-hour [2][3]. Group 2: Technological Advantages - Tandem solar cells utilize multiple layers of PV cells to absorb a broader spectrum of sunlight, potentially doubling the conversion efficiency compared to traditional products [3]. - The combination of perovskite cells for visible light absorption and silicon cells for infrared light absorption enhances overall efficiency [2][3]. Group 3: Market Potential and Domestic Supply Chain - The demand for rooftop installations is significant, with METI mandating that factories, shops, and schools set installation targets for rooftop PV panels after 2026 [3]. - Tandem products are suitable for installation in energy-efficient homes and buildings with higher load-bearing capacities [3]. - The raw materials for perovskite solar cells can be sourced domestically in Japan, reducing dependence on foreign imports and allowing for the potential establishment of a local supply chain [3]. Group 4: Future Energy Goals - The Japanese government aims to increase the share of solar energy in the overall power supply from 9.8% in 2023 to between 23% and 29% by 2040 as part of its renewable energy strategy [3].