Antimony sulfide-selenide thin film solar cells produced from stibnite mineral
| Autor: | Geovanni Vázquez García, Eira Anais Zamudio Medina, Laura Guerrero Martínez, P. K. Nair, Oscar Leyva Castrejón, Jacqueline Moctezuma Ortiz, M. T. S. Nair |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Sulfide Analytical chemistry Mineralogy chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention chemistry.chemical_compound Vacuum deposition Antimony law Selenide 0103 physical sciences Solar cell Materials Chemistry Thin film 010302 applied physics chemistry.chemical_classification Open-circuit voltage Metals and Alloys Surfaces and Interfaces 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 0210 nano-technology Stibnite |
| Zdroj: | Thin Solid Films. 645:305-311 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2017.11.004 |
| Popis: | Stibnite (Sb2S3) is a major mineral of antimony, which occurs as large crystals often with minor encrustations of other minerals. Locally sourced powdered stibnite containing some quartzite (SiO2) and ferrosilite (FeSiO3) has been used in this work as evaporation source for vacuum deposition of thin film solar cells. The added minerals were left as residue in the crucible and did not incorporate into the Sb2S3 thin film. To stibnite powder was added Sb2Se3 powder prepared in our laboratory as chemical precipitate. Source mixtures of different weight – by – weight (w/w) ratios gave thin films of chemical composition Sb2SxSe3 − x and optical band gap (Eg) within 1.38 eV (Sb2Se3) – 1.88 eV (Sb2S3). Solar cells of SnO2:F/CdS (100 nm)/Sb2S3(250 nm)/C-Ag prepared by using stibnite as evaporation source gave under standard conditions, open circuit voltage (Voc), 0.668 V; short circuit current density (Jsc), 6.95 mA/cm2; and conversion efficiency (η), 1.62%. For a 2:1 (w/w) mixture of stibnite:Sb2Se3, solar cell of Sb2S2.14Se0.86 (Eg 1.61 eV) was obtained with Voc, 0.562 V; Jsc, 13.53 mA/cm2 and η, 4.03%. For 1:5 (w/w) mixture, solar cell of Sb2S0.5Se2.5 (Eg 1.44 eV) gave Voc, 0.443 V; Jsc, 22.31 mA/cm2 and η, 4.24%. Electrical conductivity of the Sb2SxSe3 − x absorber films in the dark increased from 10− 8 to 10− 6 Ω− 1 cm− 1 and their photoconductivity, from 10− 6 to 10− 5 Ω− 1 cm− 1 as the composition changed from Sb2S3 to Sb2SxSe3 − x and Sb2Se3. Direct use of an abundant mineral as the evaporation source in thin film solar cell technology is a novelty. |
| Databáze: | OpenAIRE |
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