ZnFe2O4 thin films from a single source precursor by aerosol assisted chemical vapour deposition |
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Authors: | Asif Ali Tahir Muhammad Mazhar |
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Affiliation: | a Department of Chemistry, Loughborough University, Loughborough, Leics, LE 11 3TU, UK b Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan |
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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. |
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Keywords: | Heterobimetallic complex Bimetallic film Single-source precursor Aerosol assisted chemical vapor deposition ZnFe2O4 Thin films Optical Bandgap |
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