24.35% Perovskite Cell Efficiency Announced

• NUS and SERIS researchers have announced a 'new world record' of achieving 24.35% perovskite solar cell efficiency
• They achieved it on an active area of 1 cm² by incorporating a novel interface material into the cells
• They are now aiming to deliver perovskite solar cells with 25 years of operational stability

Researchers at the National University of Singapore (NUS) and Solar Energy Research Institute of Singapore (SERIS) have announced achieving 24.35% efficiency for self-designed inverted perovskite solar cells on an active area of 1 cm² calling it the highest, a new world record, saying it is an improvement over the previous high of 23.7% on the same area.

For 24.35% efficiency level, the team says it incorporated a novel interface material into perovskite cells that contributed a 'range of advantageous attributes'. These include excellent optical, electrical and chemical properties that enhanced both their efficiency and longevity.

Their research work has been included in the Solar Cell Efficiency Tables Version 62, published in the scientific journal Progress in Photovoltaics. According to this, the team fabricated the 1 cm² perovskite solar cell to achieve a fill factor of 82.1%, short-circuit voltage of 25.60 mA/ cm² and open-circuit voltage of 1.159 V.

Focus of further research from now on, says the team, will be on improving the stability of perovskite solar cells. It is now developing a customized accelerating aging methodology to bring this technology from lab to fab. Project Lead and Assistant Professor Hou Yi said the next goal is to deliver perovskite solar cells with 25 years of operational stability.

Team member Wang Xi said, "Our findings set the stage for the accelerated commercialization and integration of solar cells into various energy systems."