[5p-S21-1~7] The history and future of Multinary Compounds and Solar Cells - 30th anniversary symposium of Professional Group of Multinary Compounds and Solar Cells -

[5p-S21-3] Research and Development of Space Solar Cells Based on Compound Semiconductors

〇Mitsuru Imaizumi¹, Tatsuya Takamoto², Takeshi Ohshima³, Takeyoshi Sugaya⁴ (1.JAXA, 2.SHARP, 3.QST, 4.AIST)

Keywords:solar cell, space, radiation tolerance

III-V compound materials are suitable for space solar cells since the available conversion efficiency and radiation hardness are higher than silicon. In addition, III-V compound materials enable us to attain multi-junction structures which can realize rather high efficiency and radiation hardness. Currently, InGaP/GaAs/Ge triple-junction space solar cells are mainly utilized for spacecraft. On the other hand, CuInGaSe solar cells have been demonstrated super high radiation hardness by ground as well as in-orbit tests. New multi-junction space solar cell development based on a mechanical stacking technology with III-V and CIGS materials.