Korean scientists achieve 23.64% efficiency with lift-off perovskite tandem solar cell
The innovative lift-off process involves coating a polyimide layer onto a glass substrate, fabricating the perovskite-CIGS tandem solar cell on top of it, and then separating the glass.
Scientists from Korea Institute of Energy Research (KIER) have announced that their new tandem solar cell has achieved a record efficiency of 23.64%. The new cell consists of a top layer of perovskite and a bottom based on copper, indium, gallium and diselenide (CIGS) technology.
Tandem solar cells combine two or more layers of different materials to capture more sunlight and boost efficiency. Each layer absorbs a different solar spectrum, allowing the device to convert more sunlight into electricity than traditional single-layer cells. The design improves performance and energy output.
According to KIER, its technology represents a world record for lightweight, flexible tandem perovskite-CIGS devices. However, an independent third-party entity has not yet confirmed the results.
“The lift-off process developed by the research team involves coating a polyimide layer onto a glass substrate, fabricating the perovskite-CIGS tandem solar cell on top of it, and then separating it from the glass,” KIER said in a statement.