Secondary ion mass spectrometry and X-ray photoelectron spectroscopy studies on TiO2 and nitrogen doped TiO2 thin films |
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Authors: | NC Raut S Rajagopalan S Dash |
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Institution: | a Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, Indiab Corrosion Science and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, India |
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Abstract: | Anatase phase TiO2 and nitrogen (N) doped TiO2 thin films were synthesized by an ultrasonic spray pyrolysis technique on c-Si (100) substrates in the temperature range 300-550 °C. The former used a precursor solution of titanium oxy acetylacetonate in methanol whereas the later used a titanium oxy acetylacetonate hexamine mixture in methanol. Homogeneity across the film’s thickness and the nature of the film-substrate interface were studied by dynamic depth profiling acquired using secondary ion mass spectrometry SIMS. The stoichiometry and bonding state of various species present in the films were studied using X-ray photoelectron spectroscopy (XPS). N-doping was confirmed by both SIMS and XPS. XPS studies revealed that the nitrogen content of the films synthesized at 300 °C (3.2%) is high compared to that of films made at 350 °C (1.3%). |
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Keywords: | A N-doped titanium dioxide B Spray pyrolysis C X-ray photoelectron spectroscopy C Secondary ion mass spectrometry |
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