Publications by authors named "Anna K Braun"
Article Synopsis
- Researchers are exploring a method to lower the cost of III-V solar cells by detaching them from their growth substrate, allowing for the reuse of the substrate to produce multiple cells.
- The study focuses on smoothing the faceted surfaces left on GaAs(100) substrates after spalling to enable the growth of high-quality solar cells.
- The smoothing process can be influenced by the choice of epilayer material and the introduction of impurities or dopants, which significantly affect the smoothness and rate of surface improvement.
We couple halide vapor phase epitaxy (HVPE) growth of III-V materials with liftoff from an ultrathin carbon release layer to address two significant cost components in III-V device - epitaxial growth and substrate reusability. We investigate nucleation and growth of GaAs layers by HVPE on a thin amorphous carbon layer that can be mechanically exfoliated, leaving the substrate available for reuse. We study nucleation as a function of carbon layer thickness and growth rate and find island-like nucleation.
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