Local structure in Cu2ZnSnS4 studied by the XAFS method

The local structure in kesterite Cu2ZnSnS4 is studied by the X-ray absorption fine structure (XAFS) method. Absorption at the K-edge of all three cations: Cu, Zn and Sn has been measured and analyzed. Interatomic distances determined from the EXAFS data are in keeping with the existing X-ray diffraction values. Both, the XANES and EXAFS data at the Sn K-edge indicate that tin exists in the +IV oxidation state and predominantly occupies its native sites in Cu2ZnSnS4.