Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 12: Photovoltaics (Joint session of HL and DF, organized by HL)
HL 12.12: Vortrag
Montag, 7. März 2016, 18:15–18:30, H2
In-Situ XRD Analysis of the structural Evolution of CZTS Nanoparticles during an Annealing Process — •Marco Brandl1, Mohamed Sayed2, Levent Gütay2, and Rainer Hock1 — 1Chair for Crystallography and Structural Physics, Friedrich-Alexander-University of Erlangen-Nürnberg, Staudtstr. 3, 91058 Erlangen, Germany — 2Laboratory for Chalcogenide Photovoltaics (LCP), Energy and Semiconductor Research Laboratory (EHF), Department of Physics, University of Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26111 Oldenburg, Germany
A potential method for Kesterite (Cu2ZnSnS4, CZTS) based solar cell production is the synthesis of CZTS nanoparticles by a low temperature wet chemical process. Powders of nanoparticles produced by this process are analysed by X-ray powder diffraction. Initially, these particles have a cubic disordered structure with potential hexagonal stacking faults. With the method of in-situ XRD during an annealing process up to 550°C the recrystallisation to a tetragonal structure of the CZTS as well as the healing of the hexagonal defects can be observed. Furthermore, by mixing the CZTS particles with Selenium powder, the incorporation of Se into CTZS can be studied. The time and temperature resolved observation of the change in unit cell parameters can directly be connected to the Se content in the resulting CZTSSe phase via Vegard's law.