Tu, Chi-ShunChen, Cheng-SaoChen, Pin-YiWei, H.-H.Schmidt, V. HugoLin, C.-Y.Anthoniappen, J.Lee, J.-M.2019-02-082019-02-082015C.-S. Tu, C.-S. Chen, P.-Y. Chen, H.-H. Wei, V.H. Schmidt, C.-Y. Lin, J. Anthoniappen, and J.-M. Lee, “Enhanced photovoltaic effects in A-site samarium doped BiFeO 3 ceramics: The roles of domain structure and electronic state,” Journal of the European Ceramic Society 36, 1149-1157 (2015). doi: 10.1016/j.jeurceramsoc.2015.12.019.0955-2219https://scholarworks.montana.edu/handle/1/15233This work reports enhanced photovoltaic (PV) responses of (Bi1 − xSmx)FeO3 (x = 0.0, 0.05, 0.10) ceramics (BFO100xSm) with ITO film under near-ultraviolet irradiation (λ = 405 nm). The ceramics were characterized by micro-Raman scattering, high-resolution transmission electron microscopy, and synchrotron X-ray absorption spectroscopy (XAS). A rhombohedral R3c symmetry with tilted FeO6 octahedra has been confirmed. The Fe K-edge absorption spectra reveal a slight shift toward higher energy as A-site Sm3+ substitution increases. The oxygen K-edge XAS reveals an enhancement of hybridization between the O 2p and unoccupied Fe 3d states due to Sm doping. The optical band gaps are in the range of 2.15–2.24 eV. The maximal PV power-conversion and external quantum efficiencies respectively reach 0.37% and 4.1% in the ITO/BFO5Sm/Au heterostructure. The PV responses can be described quantitatively by a p-n-junction-like model. The domain structures and hybridization between the O 2p and Fe 3d states play important roles for the PV responses.enThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).http://rightsstatements.org/vocab/InC/1.0/Article