EneCoat Technologies has announced a conversion efficiency of over 30% with a 4-terminal tandem cell consisting of stacked perovskite and crystalline silicon solar cells in a joint development project with Toyota Motor Corporation.
This achievement underscores the profound research and development capabilities of both companies in the field of perovskite solar cells and accelerates the practical application of high-efficiency solar cells, which is the objective of the joint development project. In this project, the two companies focused on the transmittance of perovskite solar cells and succeeded in improving the infrared transmittance to 81%.
When installing solar cells on an automobile roof, flexibility is crucial to accommodate the unique contours and curves of different vehicle designs.
The two companies developed a film-type perovskite solar cell and achieved a conversion efficiency of 22.4%, which is high for a transparent type solar cell. By combining this film-type perovskite solar cell with a crystalline silicon solar cell, the companies achieved a conversion efficiency of 30.4% as a 4-terminal tandem solar cell.
The conversion efficiency values obtained in this development were measured in a small area at the cell level, and the scientists stated that they will continue to develop the large size modules.
