30 October 2009 Optical property of BaTiO3 ferroelectric film at room temperature
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Abstract
BaTiO3 ferroelectric films were prepared on Si(111) substrate by sol-gel method with glacial acetic acid as solvent, and acetylacetone as stabilizer, barium acetate and tetrabutyl titanate as precursor. The photoluminescence of BaTiO3 ferroelectric films were studied. Intense photoluminescence of amorphous BaTiO3 ferroelectric films excited by blue light was observed at room temperature (RT). The emission band is in a range of 540nm to 660nm in wavelength. The ferroelectric films annealed (at 673K for 8 hours) had the best photoluminescence property, when the films excited by 450nm line, the peak width is about 30nm from 580nm to 610nm, towards the yellow region. Moreover, the photoluminescence of BaTiO3 ferroelectric film is stable. The emitting region, peak wavelengths and width are not dependent on excitation wavelength and/or film thickness. The luminescence intensity increases with film thickness increasing, but decreases with the excitation wavelength raising. The crystalline BT ferroelectric films had no properties above.
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Yonghua Fu, Yonghua Fu, Xiaoqing Zhang, Xiaoqing Zhang, Zhimou Xu, Zhimou Xu, } "Optical property of BaTiO3 ferroelectric film at room temperature", Proc. SPIE 7516, Photonics and Optoelectronics Meetings (POEM) 2009: Optoelectronic Devices and Integration, 75160F (30 October 2009); doi: 10.1117/12.843484; https://doi.org/10.1117/12.843484
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