Tunable band gap of iron-doped lanthanum-modified bismuth titanate synthesized by using the thermal decomposition of a secondary phase
- Authors
- Han, Jun Young; Bark, Chung Wung
- Issue Date
- May-2015
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Bandgap; Bismuth titanate; Calcination temperature; Thermal decomposition; BiFeO3
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.66, no.9, pp.1371 - 1375
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 66
- Number
- 9
- Start Page
- 1371
- End Page
- 1375
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10579
- DOI
- 10.3938/jkps.66.1371
- ISSN
- 0374-4884
- Abstract
- The photoelectric properties of complex oxides have prompted interest in materials with a tunable band gap because of the absorption. The substitution of iron atoms in La-modified bismuth titanate (BLT) can lead to dramatic improvements in the band gap; however, the substitution of iron atoms while maintaining the original bismuth layer structure without forming a BiFeO3 secondary phase is quite challenging. Therefore, a series of Fe-doped BLT (Fe-BLT) samples were synthesized using a solid reaction at various calcination temperatures (300 900A degrees C) to remove the secondary phase. The structural and the optical properties were analyzed by using X-ray diffraction and ultraviolet-visible absorption spectroscopy. This paper reports a new route by using high-temperature calcination, to synthesize the Aurivillius phase with a reduced optical band gap due to the thermal decomposition of BiFeO3 during high-temperature calcination. This simple route to reduce the second phase can be adapted to other complex oxides for use in emerging oxide optoelectronic devices.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - IT융합대학 > 전기공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10579)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.