Chen Qi & Zhou Huanping, Science: Breakthrough! Over 24% Efficiency! Highly Reproducible and Durable Perovskite Solar Cells
Release Date:
2021-07-30 15:33
Source:
Solution processing of semiconductors holds great promise for the high-throughput production of cost-effective electronic and optoelectronic devices. Although hybrid perovskites demonstrate significant potential in a wide range of device applications, challenges remain in developing high-quality materials that simultaneously enhance process reproducibility and scalability. Chen Qi of Beijing Institute of Technology and Zhou Huanping of Peking University A liquid-medium annealing (LMA) technique is reported, which establishes a robust chemical environment and a uniform heating field to regulate the crystalline growth of the entire thin film.
The thin films produced by this method exhibit high crystallinity, fewer defects, precise stoichiometry, and excellent overall film uniformity. Consequently, the resulting perovskite solar cells (PSCs) achieve a stable power output of 24.04% (certified at 23.7% for a 0.08 cm² active area) and retain 95% of their initial power conversion efficiency (PCE) after 2,000 hours of operation.
In addition, 1 cm 2 The PSC delivers a stable power output of 23.15% (with a certified PCE of 22.3%) and retains 90% of its initial PCE after 1,120 hours of operation, demonstrating the feasibility of scalable manufacturing. The LMA approach exhibits minimal sensitivity to environmental conditions, with negligible year-to-year performance variations in devices fabricated within controlled laboratory settings. Consequently, this method paves the way for an efficient, scalable, and reproducible route to enhance the quality of perovskite films and photovoltaic devices.
Related News