TNO has introduced what it describes as the world’s first electrically functioning solar roof tile based on flexible perovskite solar cells. The development offers new opportunities for architects and building designers to integrate renewable energy directly into buildings without compromising aesthetics.

Flexible Solar Technology For Design Integration

The innovation uses a flexible perovskite solar module applied to a thin foil, which is then mounted onto a curved composite roof tile. Unlike traditional rigid photovoltaic panels, this system adapts easily to complex shapes often used in architecture.

The modules reach efficiencies of up to 13.8%. When applied to a curved roof tile, they retain an efficiency of 12.4%. This shows that bending has only a limited impact on performance. This makes it easier to integrate solar energy into roofs and façades without visual disruption.

Scalable Production And Material Efficiency

The technology supports roll-to-roll (R2R) manufacturing, a process suitable for large-scale production of lightweight solar foils. This method allows both mass production and customised solutions, which is particularly relevant for architectural applications.

By integrating solar cells directly into building components, the system reduces the need for separate mounting structures. This can lower material use and supports more circular construction approaches.

Reducing Pressure On Space And Infrastructure

Building-integrated photovoltaics help generate energy without requiring additional land. This reduces pressure on landscapes and infrastructure, especially in dense urban areas where space is limited.

Roofs and façades can become active energy-generating surfaces. This shift supports the transition towards more sustainable and energy-efficient buildings.

From Prototype To Market

TNO has developed the technology from laboratory-scale cells to functional roof tile prototypes. The organisation recently launched Perovion Technologies, a spin-out focused on commercialising flexible perovskite solar solutions.

The next phase will focus on improving durability, reliability and scalability. These steps are essential for widespread use in the construction sector.

Flexible perovskite solar technology shows strong potential as a new generation of building-integrated materials. It combines energy performance with design flexibility and supports more sustainable construction practices.

Source & photo: TNO