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Optoelectrical and structural characterization of Cu2SnS3 thin films grown via spray pyrolysis using stable molecular ink

Heidariramsheh, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.solener.2021.05.088
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. This work focused on the spray pyrolysis deposition of Cu2SnS3 (CTS) thin films using a stable basic solution. The effect of the most important parameters including the substrate temperature and copper concentration on the structural, optical and electrical properties of as-deposited thin films was investigated. Qualified thin films with suitable microstructure and composition could be deposited at 370℃. XRD and Raman analysis while confirming the pure CTS film formation, show that as the Cu/Sn decreases, the crystal structure layers are changed from the tetragonal phase to the cubic phase mixed with Sn-rich phases. The optical study shows its band gap between 1.08 and 1.2 eV for different Cu/Sn ratios with the absorption coefficient being more than104 cm-1. The Hall and Mott-Schottky measurements reveal that all samples show a p-type behavior and carrier concentration of the samples rise as the Cu/Sn ratio is enhanced. A full spray superstrate solar cell based on CTS (Cu/Sn = 1 with a semiconductor behavior) resulted in an efficiency of 0.63%. © 2021 International Solar Energy Society
  6. Keywords:
  7. Carrier concentration ; Chalcogenides ; Copper compounds ; Crystal structure ; Deposition ; Energy gap ; Semiconducting tin compounds ; Solar cells ; Solar energy ; Spray pyrolysis ; A-stable ; Basic solutions ; Molecular ink ; Optoelectrical ; SN ratio ; Spray pyrolysis deposition ; Structural characterization ; Substrates temperature ; Temperature concentration ; Thin-films ; Thin films ; Absorption coefficient ; Copper ; Crystal structure ; Film ; Fuel cell ; Microstructure ; Pyrolysis ; Spray ; Temperature
  8. Source: Solar Energy ; Volume 224 , 2021 , Pages 218-229 ; 0038092X (ISSN)
  9. URL: Optoelectrical and structural characterization of Cu2SnS3 thin films grown via spray pyrolysis using stable molecular ink