Record-breaking 24.5% Efficiency in Perovskite Tandem Solar Cells

Feb 28, 2024 02:34 PM ET

• Revolutionary solar breakthrough: 24.5% efficiency achieved by Nanjing University, University of Victoria, and Australian National University researchers using lead-tin perovskite technology.

Researchers from Nanjing University, University of Victoria, and Australian National University have achieved a world record efficiency of 24.5% on large-size all-perovskite tandem solar cells. The use of lead-tin perovskite instead of silicon in the narrow band gap cell has historically resulted in low film quality and device efficiency. However, the team utilized aminoacetamide hydrochloride to coordinate precursor components, homogenize crystallization, and passivate the buried perovskite interface, leading to the high efficiency.

The all-perovskite tandem solar module, made using blade-coating techniques, demonstrated a certified power conversion efficiency of 24.5% with an aperture area of 20.25 square centimeters. Chinese perovskite solar technology company Renshine Solar (Suzhou), founded by Nanjing University’s Professor Tan Hairen, also achieved a steady-state efficiency of 24.50% for an all-perovskite tandem cell module in October 2022.

How did researchers achieve world record efficiency on all-perovskite tandem solar cells?

• Researchers utilized lead-tin perovskite instead of silicon in the narrow band gap cell
• Aminoacetamide hydrochloride was used to coordinate precursor components, homogenize crystallization, and passivate the buried perovskite interface
• The all-perovskite tandem solar module was made using blade-coating techniques
• The certified power conversion efficiency of the module was 24.5% with an aperture area of 20.25 square centimeters
• Chinese perovskite solar technology company Renshine Solar (Suzhou) achieved a steady-state efficiency of 24.50% for an all-perovskite tandem cell module in October 2022