Title:	Kesterite Thin Films of Cu2ZnSnS4 Obtained by Spray Pyrolysis
Author(s):	L.I. Bruc, M.S. Guc, M.I. Rusu, D.A. Serban, A.V. Simashkevich, S. Schorr, V. Izquierdo-Roca, A. Pérez-Rodríguez, E.K. Arushanov
Keywords:	Raman, Spray Pyrolysis, Thin Film (TF), Kesterite, XRF
Topic:	Thin Film Solar Cells
Subtopic:	CdTe, CIS and Related Ternary and Quaternary Thin Film Solar Cells
Event:	27th European Photovoltaic Solar Energy Conference and Exhibition
Session:	3DV.3.7
Pages:	2763 - 2766
ISBN:	3-936338-28-0
Paper DOI:	10.4229/27thEUPVSEC2012-3DV.3.7
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

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Thin films of Cu2ZnSnS4 (CZTS) were deposited using the spray pyrolysis method as relatively fast and vacuum-free method. Obtained samples were analyzed using the X-Ray Fluorescence, grazing incidence X-Ray Diffraction and Raman Spectroscopy techniques. Analysis showed close to stoichiometry composition of the films with kesterite type structure but poor crystalline quality and possible existence of secondary phases. To improve the quality of the films, the asprepared layers were annealed in the presence of elemental Sn and S. Comparison of the results before and after annealing showed a strong improvement of the crystalline quality and a significant reduction of concentration of secondary phases of the films without significant change of composition. The measured optical band gap is equal to 1.52 and 1.55 eV in the asprepared and annealed films, respectively. The optical absorption coefficient is found to be > 10 4 cm-1.