Tuning of Optical Properties via Annealing of Bismuth Ferrite (BiFeO3) Thin Films  

作　　者：Harish Kumar Meena Khushbu Meena Reena Verma Karishma Jain Sushil Kumar Jain Kedar Babu Sharma Balram Tripathi Harish Kumar Meena;Khushbu Meena;Reena Verma;Karishma Jain;Sushil Kumar Jain;Kedar Babu Sharma;Balram Tripathi(Department of Physics, S S Jain Subodh PG College, Jaipur, India;Department of Physics, University of Rajasthan, Jaipur, India;Department of Physics, School of Physical Sciences, Manipal University Jaipur, Jaipur, India)

机构地区：[1]Department of Physics, S S Jain Subodh PG College, Jaipur, India [2]Department of Physics, University of Rajasthan, Jaipur, India [3]Department of Physics, School of Physical Sciences, Manipal University Jaipur, Jaipur, India

出　　处：《Open Journal of Composite Materials》2024年第3期124-131,共8页复合材料期刊（英文）

摘　　要：In this study we are reporting annealing induced optical properties of bismuth ferrite (BiFeO3) thin films deposited on glass substrate via spin coating at 5000 rpm. The structural, optical and surface morphology of BiFeO3 (BFO) thin films have been studied via X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Optical absorption (UV-Vis) and Photoluminescence (PL) spectroscopy. XRD spectra confirm annealing induced phase formation of BiFeO3 possessing a rhombohedral R3c structure. The films are dense and without cracks, although the presence of porosity in BFO/glass was observed. Moreover, optical absorption spectra indicate annealing induced effect on the energy band structure in comparison to pristine BiFeO3. It is observed that annealing effect shows an intense shift in the UV-Vis spectra as diffuse absorption together with the variation in the optical band gap. The evaluated optical band gap values are approximately equal to the bulk band gap value of BiFeO3.In this study we are reporting annealing induced optical properties of bismuth ferrite (BiFeO3) thin films deposited on glass substrate via spin coating at 5000 rpm. The structural, optical and surface morphology of BiFeO3 (BFO) thin films have been studied via X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Optical absorption (UV-Vis) and Photoluminescence (PL) spectroscopy. XRD spectra confirm annealing induced phase formation of BiFeO3 possessing a rhombohedral R3c structure. The films are dense and without cracks, although the presence of porosity in BFO/glass was observed. Moreover, optical absorption spectra indicate annealing induced effect on the energy band structure in comparison to pristine BiFeO3. It is observed that annealing effect shows an intense shift in the UV-Vis spectra as diffuse absorption together with the variation in the optical band gap. The evaluated optical band gap values are approximately equal to the bulk band gap value of BiFeO3.

关 键 词：Optical Properties ANNEALING FERROELECTRICS Photo Luminescence BFO Thin Films 

分 类 号：TB3[一般工业技术—材料科学与工程]