[16a-304-1~5] Photovoltaic 4.0 －高効率・低コスト太陽光発電がもたらす次世代再生可能エネルギーシステム－

▲ [16a-304-5] Cost-reduction technologies for High-efficiency III-V Multijution Solar Cells

〇高本 達也¹、十楚 博行¹、植田 浩介¹、大木 和樹¹、安居院 高明¹、和田 翼¹、中井戸 勝也¹、佐々木 和明¹ (1.シャープ株式会社)

キーワード：solar cell, multijunction, compound semiconductor

Cost reduction technologies for high efficiency III-V multijunction solar cells have been developed under NEDO project. Project objective is to achieve module technology with over 30% efficiency and 10 times lower cost. 31.2% efficiency module has been demonstrated by using InGaP/GaAs/InGaAs solar cells. Epitaxial liftoff technique Thinning of the epitaxial layers and reuse of substrate have been investigated to reduce the material cost.