Demonstration of functional III-V photovoltaic cell via processing of porous Ge substrates
Substrate reuse technologies focus on reducing photovoltaic device costs via substrate utilization over multiple devices. The three common substrate reuse strategies include epitaxial lift-off, controlled spalling and porous lift-off. This work focuses on the porous lift-off substrate reuse for Ge substrates. The porous lift-off substrate reuse strategy involves etching a porous layer directly into the substrate, annealing the porous film to coalesce the surface while maintaining embedded pores underneath, epitaxy on the reformed surface and mechanical lift-off of the device via the weak embedded ...
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