[16a-304-1~5] Photovoltaic 4.0 - Next-generation renewable energy systems powered by high-efficiency, low-cost photovoltaics -

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

〇Tatsuya Takamoto¹, Hiroyuki Juso¹, Kohsuke Ueda¹, Kazuki Ohki¹, Takaaki Agui¹, Tsubasa Wada¹, Katsuya Nakaido¹, Kazuaki Sasaki¹ (1.SHARP Corp.)

Keywords: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.