>35% 5-junction space solar cells based on the direct bonding technique. (December 2021)

• Record Type: Journal Article
• Authors: Li, Xinyi; Li, Ge; Lu, Hongbo; Zhang, Wei
• Is Part Of: Journal of semiconductors. Volume 42:Number 12(2021)
• Publication Date: 2021-12
• Subjects: III–V -- multijunction -- solar cells -- high efficiency -- semiconductor bonding; Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1674-4926/42/12/122701
• Languages: English
• ISSNs: 1674-4926

Abstract

Abstract: Multijunction solar cells are the highest efficiency photovoltaic devices yet demonstrated for both space and terrestrial applications. In recent years five-junction cells based on the direct semiconductor bonding technique (SBT), demonstrates space efficiencies >35% and presents application potentials. In this paper, the major challenges for fabricating SBT 5J cells and their appropriate strategies involving structure tunning, band engineering and material tailoring are stated, and 4-cm 2 35.4% (AM0, one sun) 5J SBT cells are presented. Further efforts on detailed optical managements are required to improve the current generating and matching in subcells, to achieve efficiencies 36%–37%, or above.