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Synthesis, Structural and Photo Physical Properties of Perovskite Oxide (KNbO3)1-x+(La2NiMnO6)x for Photovoltaic Application
M.S. Sheikh, A. Dutta, T.K. Bhowmik, S.K. Ghosh, S.K. Rout, T.P. Sinha
Magnetic Field, Characterisation, Characterization, Perovskite, Band Gap
New Materials and Concepts for Photovoltaic Devices
Subtopic: New Materials and Concepts for Cells and Modules
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 1CV.4.36
143 - 148
ISBN: 3-936338-50-7
Paper DOI: 10.4229/35thEUPVSEC20182018-1CV.4.36
0,00 EUR
Document(s): paper, poster


Solid solutions of perovskite oxides (KNbO3)1-x+(La2NiMnO6)x (x=0, 0.1, 0.2 and 0.3) with a variation of band gap (1.33-3.6 eV) have been introduced as a promising photovoltaic absorber. The structural characterization of the prepared samples was carried out using X-ray diffraction (followed by Rietveld refinement) and Raman experiment. As the doping percentage of the monoclinic La2NiMnO6 in the solid-solution increases, the crystal structure of host KNbO3 becomes more symmetric from orthorhombic to cubic. A large reduction in the particle size has also been observed in the solid solutions in comparison to the pure KNbO3. The band gap (~ 1.33 eV) of the synthesized solid solution x=0.1 is found to be very close to the Shockley-Queisser band gap value of 1.34 eV, which suggests the promising photovoltaic possibility in this material. Photoluminescence (PL) emission spectra reveal a strong PL quenching in the solid-solutions in comparison to the KNbO3. The overall structural and optical studies suggest the promising photovoltaic possibility in KNbO3/ La2NiMnO6 solid solution.