Groundbreaking Technology for Satellite Power Systems
On November 18, 2025, Schott, the renowned German specialty glass manufacturer, introduced its latest innovation—SCHOTT Solar Glass exos. This cerium-doped cover glass is designed specifically for space solar cells, meeting the increasing demands of satellite technology and space exploration. With its advanced features, this glass is set to enhance the efficiency and longevity of solar power systems in low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary orbit (GEO) applications.
Key Features and Specifications
- Enhanced Radiation Resistance: The glass offers superior resistance to solarization, ensuring consistent performance even under prolonged UV and radiation exposure.
- Optical Stability: With a luminous transmittance exceeding 91%, the cover glass maintains high energy conversion efficiency.
- Thermal Compatibility: Its coefficient of thermal expansion (CTE) of 6.9 × 10⁻⁶ K⁻¹ is optimized for GaAs-based solar cells, minimizing thermal stress.
- UV Cut-off: The glass effectively cuts off UV rays at 308 nm, protecting solar cell components and enhancing their durability.
These features position SCHOTT Solar Glass exos as a game-changer for next-generation solar technologies, supporting new cell architectures and increasing power density.
Collaboration and Development Insights
The development of this innovative glass stemmed from a partnership between Schott and AZUR SPACE Solar Power GmbH, a leading developer of multijunction solar cells in Europe. This collaboration has not only focused on cutting-edge technology but also emphasized a 100% European supply chain for space solar assemblies, bolstering technological independence and scalability for satellite constellations. The project received backing from the European Space Agency (ESA) and support from the German Aerospace Center (DLR).
Market Context and Future Implications
The launch of SCHOTT Solar Glass exos comes at a crucial time as the demand for efficient solar power systems in satellites increases. The market is witnessing a surge in satellite constellations and extended mission profiles, necessitating robust and high-efficiency solar solutions. By introducing this new cover glass, Schott aims to enhance Europe’s autonomy in space technology, facilitating the growth of commercial and government satellite production.
Furthermore, the glass is undergoing qualification under the European Cooperation for Space Standardization (ECSS), ensuring compliance for future space missions and reinforcing Schott’s commitment to meeting evolving industry standards.
Conclusion: A Step Towards Sustainable Space Solutions
As the space industry evolves, so does the need for advanced materials that can withstand the rigors of space environments. SCHOTT Solar Glass exos not only addresses these demands but also enhances the sustainability and efficiency of solar power systems in space. This innovation is a testament to Schott’s dedication to pioneering solutions that empower the future of renewable energy technology in challenging conditions.
