space medium True/False

Multi-junction solar cells achieve >30% efficiency by stacking semiconductor layers tuned to different wavelengths.

  1. True
  2. False

Answer: True

Triple-junction GaInP/GaAs/Ge cells capture broader solar spectrum, reaching 32-35% efficiency vs ~20% for silicon; standard on GEO/deep space missions.

Topic Space Technology - Power
Exam Relevance ISRO Scientist Exam, SSC CPO