Abstract
Fe doped FTO powders were prepared by a chemical precipitation method. Mössbauer spectra of FTO with several concentrations of Fe dopants were decomposed into two doublets (D1 and D2). A doublet with a small electric field gradient (D1) is assigned to Fe3+ in a small distorted site of the rutile structure, and another doublet (D2) to Fe3+ in a large distorted site due to F− ion and oxygen defect. Furthermore, with increase of the annealing temperature the isomer shifts tended to decrease. It suggests that Fe3+ bonds are more covalently bonded than ionic at the higher annealing temperatures. The surface layer of grains were also characterized by 57Fe CEMS. The defect structures of Fe doped FTO were estimated using the oxygen defect models of tin oxide [Mudarra Navarro et al., J. Phys. Chem. C, 119, 5596 (2015)].
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Shi, X.H., Xu, K.J.: Properties of fluorine-doped tin oxide films prepared by an improved sol-gel process. Mater. Sci. Semicond. Process. 58, 1–7 (2017)
Ramírez-Amador, R., Flores-Carrasco, G., Alcántara-Iniesta, S., Rodríguez González, J., García-Teniza, O., Mercado-Agular, E., Vásquez-Ortiz, A.B.: Structural, morphological, optical, and electrical characterization of fluorine doped tin oxide (FTO) thin films synthesized by PSP. Solid State Phenom. 286, 64–71 (2019)
Wang, X., Wang, X., Di, Q., Zhao, H., Liang, B., Yang, J.: Mutual effects of fluorine dopant and oxygen vacancies on structural and luminescence characteristics of F doped SnO2 nanoparticles. Materials. 10, 1398 (2017)
Chandra, S., Ravichandran, K., George, G., Arun, T., Rajkumar, P.V.: Influence of Fe and Fe+F doping on the properties of sprayed SnO2 thin films. J. Material Science: Mater Electron. 27, 9558 (2016)
Nomura, K.: Magnetic properties and oxygen defects of dilute metal doped tin oxide-based semiconductor. Croatia Chemica Acta. 88, 579 (2015)
Nomura, K., Ujihira, Y., Vertes, A.: Applications of conversion electron Mössbauer spectrometry (CEMS). J. Radioanal. Nucl. Chem. 202, 103–199 (1996)
Coey, J.M.D., Mlack, J.T., Venkatesan, M., Stamenov, P.: Magnetization process in dilute magnetic oxides. IEEE Trans. Magn. 46, 2501–2503 (2010)
Coey, J.M.D., Venkatesan, M., Fitzgerald, C.B.: Donor impurity band exchange in dilute ferromagnetic oxides. Nat. Mater. 4, 173–179 (2005)
Mudarra Navarro, A.M., Rodríguez Torres, C.E., Cabrera, A.F., Weissmann, M., Nomura, K., Errico, L.A.: Ab Initio study of the ferromagnetic response, local structure, and hyperfine properties of Fe-doped SnO2. J. Phys. Chem. C. 119, 5596 (2015)
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME2019), 1-6 September 2019, Dalian, China Edited by Tao Zhang, Junhu Wang and Xiaodong Wang
Rights and permissions
About this article
Cite this article
Nomura, K., Sasaki, M., Saito, R. et al. State analysis of fluorine-doped SnO2 (FTO) by 57Fe Mössbauer spectroscopy. Hyperfine Interact 240, 118 (2019). https://doi.org/10.1007/s10751-019-1656-x
Published:
DOI: https://doi.org/10.1007/s10751-019-1656-x