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Title: Novel Solution Process for Fabricating Ultra-Thin-Film Absorber Layers in Fe2SiS4 and Fe2GeS4 Photovoltaics

Fe2SiS4 and Fe2GeS4 crystalline materials posses direct bandgaps of ~1.55 and ~1.4 eV respectively and an absorption coefficient larger than 10^5 cm–1; their theoretical potential as solar photovoltaic absorbers has been demonstrated. However, no solar devices that employ either Fe2SiS4 or Fe2GeS4 have been reported to date. In the presented work, nanoprecursors to Fe2SiS4 and Fe2GeS4 have been fabricated and employed to build ultra-thin-film layers via spray coating and rod coating methods. Temperature-dependent X-Ray diffraction analyses of nanoprecursors coatings show an unprecedented low temperature for forming crystalline Fe2SiS4 and Fe2GeS4. Fabricating of ultra-thin-film photovoltaic devices utilizing Fe2SiS4 and Fe2GeS4 as solar absorber material is presented.
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Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1946--4274
DOE Contract Number:
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Resource Relation:
Journal Name: MRS Proceedings; Journal Volume: 1670; Conference: 2014 MRS Spring Meeting, San Francisco, CA, April 21-25, 2014
Research Org:
Delaware State University
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Contributing Orgs:
Delaware State University, University of Delaware Institute of Energy Conversion
Country of Publication:
United States
14 SOLAR ENERGY photovoltaic; thin film; grain size