Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 324, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2023.124082
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Si136 is a promising semiconductor with a direct bandgap for photovoltaics, synthesized through Na extraction from Na24Si136. In this study, 93 at.% of Na extraction from a single crystal of Na24Si136 was achieved using high-pressure-annealed zeolite as an ion absorber. The residual amount of Na is the least record among Na extraction from a single-crystalline Na24Si136. High-pressure annealing is suggested to improve Na diffusion between the grains of amorphous phases of zeolite.
An allotrope of Si, Si136, is a promising semiconductor for photovoltaics due to its direct bandgap. Si136 is synthesized via Na extraction from Na24Si136. In this study, 93 at.% of Na extraction from a single crystal of Na24Si136 was achieved using high-pressure-annealed zeolite as an ion absorber. The residual amount of Na is the least record among Na extraction from a single-crystalline Na24Si136. Na diffusion between the grains of amorphous phases of zeolite was suggested to be improved due to high-pressure annealing.
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