Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8016113 | Materials Letters | 2016 | 10 Pages |
Abstract
Ferroelectric perovskite oxides [KNbO3]1âx[BaCo1/2Nb1/2O3âδ]x(KBCNO, δ>0 means the existence of oxygen vacancies) solid solutions (0.1â¤xâ¤0.5)were successfully synthesized by doping Co and Ba into the lattice of KNbO3 though solid-state reaction. The band gap energy of KBCNO shifts down to 2.4 eV and became visible-light-active due to the doping affection on the energy band structure comparing with that of wide-band-gap semiconductor KNbO3 (3.4 eV). The X-ray diffraction and Raman spectra revealed that the KBCNO solid solutions are in perovsite phase and gradually transiting from orthorhombic to cubic structure with the different BaCo1/2Nb1/2O3âδ (BCNO) contents. The reduction of band gap value makes KBCNO ferroelectric a promising candidate for photovoltaic materials.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Limin Yu, Junhong Jia, Gewen Yi, Yu Shan, Minmin Han,