Imec unveils bifacial perovskite solar panel with a thermally stable device stack

Imec has launched a perovskite solar module based on a scalable device stack. The panel is based on 17 per cent efficient perovskite solar cells built with a p-i-n configuration, an electron transport layer made of nickel(II) oxide, a perovskite layer deposited via slot-die coating, an electron transport layer made of buckminsterfullerene and lithium fluoride, a bathocuproine buffer layer, and a copper (Cu) electrode.

Additionally, the scientists have developed a 56-cell monofacial panel with a 784 sq. cm active surface, a power conversion efficiency of 13.08 per cent, and a geometrical fill factor of roughly 89 per cent. They then built a second bifacial module by replacing the Cu electrode with one based on indium tin oxide. The bifacial panel has an aperture area of 781 sq. cm and is able to achieve a po­wer conversion efficiency of 11.9 per cent. Additionally, the encapsulated bi­fa­cial mini-modules they created exhibited high tolerance to the IEC 61215-based damp heat, with the best ones retaining around 92 per cent of their initial efficiency after 1,000 hours.