期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 55, 期 3, 页码 317-321出版社
SPRINGER
DOI: 10.1007/s10971-010-2255-0
关键词
Dielectric materials; X-ray diffraction; Growth from solutions; Inorganic compounds; Oxides; Atomic force microscopy
资金
- LP Displays Ltd, Blackburn, UK
UV-visible optical spectra were obtained at room temperature in air for solution-processed thin films of 12CaO center dot 7Al(2)O(3)(C12A7) on the MgO < 100 > single crystal substrates after the post-deposition heat treatment at 1,100 A degrees C. Two absorption peaks were observed at 5.3 and 6.1 eV and their presence was attributed to the complex electronic structure of C12A7 and its different energy levels due to the extra-framework species and the framework itself. The peak at 5.3 eV is believed to be associated with O2--Cage Conduction Band type transition whereas the Framework Valence Band to Framework Conduction Band transition is responsible for the peak at 6.1 eV. The nature of electronic transition was found to be direct from the analysis due to Tauc's law.
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