A Two-Step Magnetron Sputtering Approach for the Synthesis of Cu 2 ZnSnS 4 Films from Cu 2 SnS 3 \ZnS Stacks.

Autor: Zaki MY; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Sava F; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Simandan ID; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Buruiana AT; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania.; Faculty of Physics, University of Bucharest, Atomistilor 405A, Magurele 077125, Romania., Stavarache I; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Bocirnea AE; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Mihai C; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Velea A; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania., Galca AC; National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2022 Jun 27; Vol. 7 (27), pp. 23800-23814. Date of Electronic Publication: 2022 Jun 27 (Print Publication: 2022).
DOI: 10.1021/acsomega.2c02475
Abstrakt: Cu 2 ZnSnS 4 (CZTS) is regarded as one of the emerging materials for next-generation thin film solar cells. However, its synthesis is complex, and obtaining a single-phase CZTS thin film is difficult. This work reports the elaboration of Cu 2 ZnSnS 4 thin films by a sequential magnetron sputtering deposition of Cu 2 SnS 3 (CTS) and ZnS as stacked films. Initially, the CTS films were prepared on a soda lime glass substrate by annealing Cu and SnS 2 stacked layers. Second, ZnS was deposited by magnetron sputtering on the CTS films. The CTS\ZnS stacks were then annealed in Sn + S or S atmospheres. The tetragonal CZTS structure was obtained and confirmed by grazing incidence X-ray diffraction and Raman spectroscopy. The morphological and compositional characteristics, measured by scanning electron microscopy and energy-dispersive spectroscopy, revealed large grains and dense surfaces with the elemental composition close to the intended stoichiometry. Additional X-ray photoemission spectroscopy measurements were performed to determine the surface chemistry and particularities of the obtained films. The optical properties, determined using conventional spectroscopy, showed optimal absorber layer band gap values ranging between 1.38 and 1.50 eV. The electrical measurements showed that all the films are p-type with high carrier concentrations in the range of 10 15 to 10 20 cm -3 . This new synthesis route for CZTS opens the way to obtain high-quality films by an industry-compatible method.
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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