Key Findings
A collaborative research team from Nanjing University and Renshine Solar in China has announced a groundbreaking achievement in perovskite solar cell modules. They established a new world record in this field by achieving a certified power conversion efficiency of 24.0% on a remarkably large module with an aperture area of 810 cm². This record is particularly significant because it was achieved on a large-area module, closer to commercial utility, rather than small laboratory-scale cells, indicating substantial progress in the industrial application of perovskite technology.
Technical Details
The attainment of this world record was primarily enabled by an innovative passivation strategy that employed a chemically stable lead carboxylate passivator (LCP). The LCP effectively passivates defects present on the surface and at the grain boundaries of the perovskite material, thereby suppressing non-radiative recombination losses of charge carriers. This leads to an improvement in the open-circuit voltage (Voc) and fill factor (FF) of the device, minimizing the efficiency drop typically associated with scaling up to larger areas. The research team confirmed that the introduction of LCP enhances the stability of the perovskite layer and also improves the robustness of the manufacturing process. This technology is likely compatible with industrially scalable thin-film deposition techniques such as spin coating or slot-die coating.
Background and Context
Perovskite solar cells hold immense promise as a next-generation photovoltaic technology due to their high photoelectric conversion efficiency and potential for low-cost manufacturing. However, despite achieving high efficiencies in small-area cells, a long-standing challenge has been the decline in efficiency when scaling up to large-area modules. This is typically attributed to issues like non-uniformity, increased defect density, and higher resistive losses as the area grows. The achievement by Nanjing University and Renshine Solar represents a crucial technical breakthrough in overcoming this scale-up bottleneck, which is essential for accelerating the commercialization of perovskite solar cells. The Chinese government has prioritized the development of renewable energy technologies, and this achievement will contribute to strengthening the competitiveness of China’s solar power industry.
Strategic Significance and Outlook
The achievement of 24.0% efficiency on an 810 cm² large-area module clearly paves the way for the practical application of perovskite solar cells in large-scale solar farms and building-integrated photovoltaics (BIPV). The LCP passivation strategy is likely to become a key element in future perovskite module designs. The research team aims to further optimize this technology, improve long-term reliability, and further reduce manufacturing costs. Consequently, perovskite solar cells are expected to significantly contribute to the global energy transition as a replacement or complementary technology to conventional silicon solar cells, accelerating the widespread adoption of solar power.
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