Continuously controllable optical band gap in orthorhombic ferroelectric KNbO3-BiFeO3 ceramics

PASCUAL-GONZALEZ, Cristina, SCHILEO, Giorgio, MURAKAMI, Shunsuke, KHESRO, Amir, WANG, Dawei, REANEY, Ian and FETEIRA, Antonio (2017). Continuously controllable optical band gap in orthorhombic ferroelectric KNbO3-BiFeO3 ceramics. Applied Physics Letters, 110 (17).

Full text not available from this repository.
Link to published version:: 10.1063/1.4982600

Abstract

The optical band gap of orthorhombic ferroelectric KNbO3 is shown to be continuously controllable via Bi and Fe co-substitution according to a K1-xBixNb1-xFexO3 doping mechanism. Room temperature X-ray diffraction data combined with Raman spectroscopy analysis show the polar orthorhombic crystal structure to persist up to x=0.25, while the bandgap narrows monotonically by 1 eV (~33%). In-situ Raman spectroscopy corroborates the polar nature of all compositions in the temperature range -100 to 200 C. The ability to control the band gap while maintaining the spontaneous polarisation makes the K1-xBixNb1-xFexO3 system interesting for photoinduced processes in a wide temperature range.

Item Type: Article
Identification Number: 10.1063/1.4982600
Depositing User: Antonio Feteira
Date Deposited: 27 Apr 2017 09:08
Last Modified: 22 May 2017 13:54
URI: http://shura.shu.ac.uk/id/eprint/15610

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics