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ZnFe2O4 thin films from a single source precursor by aerosol assisted chemical vapour deposition
Authors:Asif Ali Tahir  Muhammad Mazhar
Affiliation:a Department of Chemistry, Loughborough University, Loughborough, Leics, LE 11 3TU, UK
b Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan
Abstract:A single source heterobimetallic complex Fe2(acac)4(dmaeH)2]ZnCl4] (1) (acac = 2,4-pentanedionate, dmaeH = N,N-dimethylaminoethanol), was synthesized in high yield. The complex was analyzed by melting point, Fourier transfer infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). The structure of the cation was established by single crystal X-ray analysis on a derivative, Fe2(acac)4(dmaeH)2]ZnCl3(THF)]2·THF (1a) (THF = tetrahydrofuran). TGA analysis showed that complex (1) undergoes facile thermal decomposition at 450 °C to give ZnFe2O4 residue. In-house designed aerosol assisted chemical vapour deposition equipment was used to deposit thin films of ZnFe2O4 on fluorine doped SnO2 coated conducting glass substrate at 450 °C. X-ray diffraction analysis proved the formation of crystalline ZnFe2O4 phase and scanning electron microscopy revealed the film morphology with well defined crystalline particles evenly distributed in the range 150-200 nm. The indirect and direct bandgap energies of the thin films were estimated to be 1.76 and 2.10 eV, respectively.
Keywords:Heterobimetallic complex  Bimetallic film  Single-source precursor  Aerosol assisted chemical vapor deposition  ZnFe2O4  Thin films  Optical Bandgap
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