A research team from Southwest Petroleum University has achieved a major milestone in photovoltaic technology, pushing the efficiency of small-sized perovskite-silicon tandem solar cells to nearly 35%. This groundbreaking figure far exceeds the theoretical efficiency limit of 29.4% for traditional single-crystalline silicon cells, breaking the long-standing physical bottleneck of mainstream solar technology.
This new structure brings unique spectral absorption advantages. The upper perovskite layer captures short-wave sunlight including ultraviolet and visible light, while the bottom silicon layer absorbs residual long-wave infrared light. This complementary design greatly reduces light energy loss and maximizes solar energy utilization, outperforming conventional N-type silicon cells in power generation potential.
Current Industrial Challenges
Despite impressive lab results, large-scale commercialization still faces prominent technical barriers. The 35% high efficiency is only realized on tiny experimental devices. Scaling up to industrial-sized modules will cause obvious efficiency attenuation, due to uneven film coating and unavoidable micro defects in large-area production.
Long-term stability is another core challenge. Perovskite materials are sensitive to moisture, oxygen and high temperature, making it hard to meet the 25-year service life requirement of outdoor photovoltaic power stations. Besides, customized production equipment and immature supporting supply chains further increase manufacturing costs, hindering mass production promotion.
Future Industrial Development Outlook
In the short term, tandem cells will prioritize high-value segmented scenarios. With high power density and lightweight features, they will be first applied in aerospace, BIPV, commercial distributed photovoltaics and portable energy storage fields, bringing higher power generation benefits for land-cost-sensitive projects.
In the mid-to-long term, continuous technological iteration will drive industrial maturity. With optimized packaging technology and upgraded mass production processes, large-module efficiency is expected to stabilize above 28%. The industry will form a dual pattern of conventional silicon modules for general scenarios and tandem cells for high-end markets.
Ultimately, perovskite-silicon tandem technology will reshape the photovoltaic competition landscape. It will shift the industry from vicious price competition to efficiency-driven technological innovation, effectively boosting global clean energy popularization and carbon neutrality progress.