期刊
MATERIALS LETTERS
卷 221, 期 -, 页码 326-329出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.03.089
关键词
KNbO3-based ceramics; Bandgap narrowing; Photoferroelectrics; Ferroelectric photovoltaics
资金
- CNPq [201665/2015-8]
- CAPES
- FAPERGS [16/2551-0000525-7]
- Sheffield Hallam University
The crystal structure of (1-x)KNbO3-xBiFeO(3) (KNBF) and (1-x)KNbO3-LaFeO3 (KNLF) (where x = 0.00; 0.01; 0.02; 0.04; 0.08; 0.16; 0.32) was evaluated by XRD and Raman spectroscopy. XRD data show the crystal symmetry to evolve from orthorhombic to tetragonal with increasing x. The optical bandgap was found to narrow systematically with increasing x. Raman spectroscopy analysis corroborated long-range polar order in all compositions. The photoresponse of x = 0.32 shows a typical diode-like behaviour, with current and voltage of 0.115 mu A and 0.075 V for KNBF and 0.19 mu A and 0.035 V for KNLF, respectively. To our knowledge these represent the largest values among KNbO3-based ceramics, making them promising for photovoltaic applications. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据