4 ADITI

Development of High-Efficiency Lightweight Space-Grade Silicon-Perovskite Tandem Solar Panels (150 W Class) for Small Satellites ( upto 200 kg Class)

The challenge seeks development of: • Space-grade thin Silicon solar cells (60– 80 μm) • Space-grade Perovskite cells • Silicon–Perovskite tandem cells • 150 W rigid solar panel (mandatory) • Flexible rollout panel (desirable) • Demonstration to TRL-8 (ground qualification), TRL-9 (flight optional) Performance targets: • ≥22% efficiency at AM0 (28°C) • ≥200 W/m2 areal power density (BOL) • ≥80 W/kg specific power • Radiation tolerant encapsulation • Thermo-vac capability −120°C to +120°C • Deployment demonstration (1g or 0g)

Challenges