KEY ASPECTS ON DEVELOPMENT OF HIGH EFFICIENCY HETEROJUNCTION AND IBCHETEROJUNCTION SOLAR CELLS: TOWARDS 22 EFFICIENCY ON INDUSTRIAL SIZE

摘要

In this paper, we show the latest results of CEA-INES on the development of HET and IBC-HET solarcells. We have focused the research on the optimization of the amorphous (a-Si:H) and TCO layers to increase Jscand FF values on HET cells. Moreover, we have fabricated silver –free HET solar cells with a Copper electroplatingmetallization. We also show our latest results obtained with a new structure combining HET and IBC (InterdigitatedBack Contact) concepts: the SLASH IBC cell (Structuring by Laser Ablation of Silicon Heterojunction). Short-circuitcurrent issues for both standard - and IBC – HET solar cells are discussed in this paper. Efficiencies higher than 22%have been achieved on 100 cm~2 standard HET solar cells and close to 20% on 25 cm~2 SLASH IBC cells.