Quantification of antimony depth profiles in Sb-doped tin dioxide thin films |
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| Authors: | Sari Lehto Reijo Lappalainen Heli Viirola and L Niinistö |
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| Institution: | (1) Laboratory of Inorganic and Analytical Chemistry, Helsinki University of Technology, FIN-02150 Espoo, Finland;(2) Accelerator Laboratory, University of Helsinki, PO Box 9, FIN-00014 Helsinki, Finland |
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| Abstract: | Sb-doped SnO2 thin films, deposited by atomic layer epitaxy (ALE) for gas sensor applications, have been characterized by secondary ion mass spectrometry (SIMS). Quantification of the depth profile data has been carried out by preparing a series of ion implanted standards. Average concentrations determined by SIMS have been compared with Sb/Sn ratios obtained by X-ray fluorescence (XRF) spectrometry and proton induced X-ray emission (PIXE) spectrometry and have been found to be in good agreement. However, a detection limit of 5×1018 at cm-3 could only be obtained because of mass interferences. SIMS data show that the ALE technique can be used to produce a controllable growth and doping of thin films. |
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