Unlocking All-Perovskite Tandem Solar Cell Efficiency

• Researchers have developed an all-perovskite tandem solar cell with a power conversion efficiency of 28.5%, open-circuit voltage of 2.112 V, and stabilized efficiency of 28.0%. Teams from Nanjing University, University of Science and Technology of China and Chinese Academy of Sciences (CAS) were involved.

Researchers at China's Nanjing University, University of Science and Technology of China and Chinese Academy of Sciences (CAS) have developed an all-perovskite tandem solar cell which is said to have lower interfacial non-radiative recombination and improved charge extraction. The cell achieved a power conversion efficiency of 28.5%, an open-circuit voltage of 2.112 V, a short-circuit current of 6.5 mA cm-2, and a fill factor of 81.9%, with the Japan Electrical Safety and Environment Technology Laboratories certifying a stabilized efficiency of 28.0%. The team also fabricated a cell with a large area of 1.05 cm2, and its efficiency reached 26.9%. The researchers mentioned that further investigation should be conducted to leverage the full potential of all-perovskite tandem solar cells.

What Are the Benefits of All-Perovskite Tandem Solar Cells?

• Improved Charge Extraction: The all-perovskite tandem solar cell provides more efficient charge extraction than other photovoltaic systems due to its unique molecular structure.
• Lower Interfacial Non-radiative Recombination: The all-perovskite tandem solar cell has a low interfacial non-radiative recombination, which provides high-efficiencies and stability over a long period.
• High-Efficiencies: A power conversion efficiency of 28.5% has been achieved. Additionally, a cell with a large area of 1.05 cm2 had an efficiency of 26.9%, ensuring high-efficiencies even at larger scales.
• Stabilized Efficiency: The Japan Electrical Safety and Environment Technology Laboratories have certified a stabilized efficiency of 28.0%, ensuring a reliable and long-term output.
• Scaleable: The all-perovskite tandem solar cell can be scaled up for larger areas with no decrease in efficiency. This makes it suitable for a variety of applications.