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This content will become publicly available on February 12, 2016

Title: Impact of Sodium Contamination in Tin Sulfide Thin-Film Solar Cells

Empirical observations show that sodium(Na) is a benign contaminant in some thin-filmsolar cells. Here, we intentionally contaminate thermally evaporated tin sulfide (SnS)thin-films with sodium and measure the SnS absorber properties and solar cellcharacteristics. The carrier concentration increases from 2 × 1016 cm-3 to 4.3 × 1017 cm-3 in Na-doped SnSthin-films, when using a 13 nm NaCl seed layer, which is detrimental for SnS photovoltaic applications but could make Na-doped SnS an attractive candidate in thermoelectrics. We observed trends in carrier concentration and found that it is in good agreement with density functional theory calculations, which predict an acceptor-type NaSn defect with low formation energy.
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [1] ;  [3] ;  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Harvard Univ., Cambridge, MA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 2166-532X
Grant/Contract Number:
AC36-08GO28308; EE0005329; EERE Postdoctoral Research Award
Published Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 2; Related Information: APL Materials; Journal ID: ISSN 2166-532X
American Institute of Physics (AIP)
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
Country of Publication:
United States
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; II-VI semiconductors; sodium; solar cells; carrier density; secondary ion mass spectrometry (SIMS)