Perovskite refers to a class of materials that share the mineral perovskite's crystalline structure. They are sensitive to wavelengths of light that conventional silicon solar panels do not efficiently convert to electricity. Combining perovskite with conventional silicon solar cells can increase their efficiency for a tandem technology that can also lower the cost of solar energy.

Tandem PV stacks conventional silicon solar cells with thin-film perovskite materials for tandem panels with 30% efficiency, which is roughly 25% more powerful than the average silicon solar panel. Tandem PV’s stacked design distinguishes the company from most competitors, who deposit perovskite directly on silicon cells to make monolithic tandem cells.

Tandem PV has demonstrated the equivalent of decades of projected durability in the lab, although its newest and highest performing panels are still undergoing testing. We plan to provide independent industry-standard validation of efficiency and durability, expected to rise further, during 2024.

Perovskites can degrade when they react with moisture and oxygen or with extended exposure to light, heat or voltage (just as silicon-based solar panels can). However, Tandem PV is drawing on years of solar industry experience and patented technology to demonstrate extended durability through a variety of technology and design innovations. A perovskite panel that combines robust durability and high efficiency is required for commercial success.