Easy-to-fabricate 20% efficient large-area silicon solar cells
2001
Abstract Recently, an innovative silicon solar cell structure has been developed at ISFH which is capable of achieving very high cell efficiencies on industrial-size wafers with a simple photolithography-free processing sequence. As the corresponding solar cells essentially rely on the application of obliquely evaporated contacts they are denoted as OECO cells. In this paper the successful up-scaling of the novel OECO process from 21% efficient 4 cm 2 laboratory devices to the fabrication of large-area (⩾100 cm 2 ) silicon solar cells is described, and independently confirmed total area efficiencies of 20% are reported for 10×10 cm 2 OECO-type solar cells fabricated on p-type float-zone silicon.
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