Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 187, Issue -, Pages 9-14Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2018.07.013
Keywords
Sol-gel preparation; Solar energy materials; Thin films; Ferroelectrics
Funding
- Innovation Fund of Inner Mongolia University of Science and Technology [2016QDL-B03, 2016QDL-S01]
- National Natural Science Foundation of China [51702169, 11604237]
- Natural Science Foundation of Inner Mongolia [2015JQ04, 2017BS0503]
- Natural Science Foundation of Hebei Province [E2015105079]
- Grassland Talent Plan of Inner Mongolia Autonomous Region
- Program for Innovative Research Team in Universities of Inner Mongolia Autonomous Region [NMGIRT-A1605]
- Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region
- Innovation Guide Fund of Baotou
- Innovation Guide Fund for Science and Technology of Inner Mongolia Autonomous Region [KCBJ2018034]
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Double perovskite ferroelectric Bi2FeMoxNi1-xO6 (BFMNO) thin films were fabricated using the sol-gel method. The thin films have a broad-band absorptionin visible light range of 400-650 nm. With the increase of Mo content, the optical bandgap decreases from 2.19 eV to 2.07 eV. More importantly, the as-prepared BFMNO thin films have self-polarization behavior that causes the forming of the depolarization field and build-in field in the thin films. The narrow band gap and strong ferroelectric self-polarization play a crucial part in improving the photovoltaic effect. The thin film of x = 0.7 has the optimum open circuit voltage and short circuit current which are 5.41 V and 71.07 mu A/cm(2) under light illumination of 110 mW/cm(2). In addition, the photovoltaic effect of the thin film also exhibits a good adaptability in high temperature environment. This work highlights the applications of the BFMNO thin films as a novel high-performance ferroelectric photovoltaic material.
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