Engineering the band gap of LaCrO3 doping with transition metals (Co, Pd, and Ir)
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Exceptional properties such as dielectric, ferroelectric, piezoelectric, magnetic, catalytic, and photovoltaic of perovskite materials open new doors to many groundbreaking discoveries for unique device ideas. These materials properties are inherited from their crystal structures; therefore, the features can be tuned via varying details of the crystal structures. In the literature, LaCrO3 (LCO) is one those mostly examined perovskites for various purposes such as solid oxide fuel cells, catalytic converters, and sensors. In the present study, the band gap tuning of LCO was investigated via doping a transition element such as cobalt (Co), palladium (Pd), and iridium (Ir) into Cr atom. The synthesized doped and un-doped LCO powders were characterized by infrared spectra (IR) and X-ray diffraction (XRD). Scanning electron microscopy (SEM) was employed to study the surface topography of LCO and doped LCO thin films on silicon substrates. The band gaps of the LCO and doped LCO films were scrutinized using a UV–Vis spectrometer. Our study has shown that the band gap of LCO was successfully lowered from 3.4 eV to 2.66 eV and can be engineered via substitution at various mol% of transition elements (Co, Pd, Ir) onto B-site Cr atom in the LCO perovskite structure.
This work was supported by The Scientific and Technological Research Council of Turkey (TÜBİTAK) through Grant No: 116F025. The authors would like to thank Dr. David K. Christen for his valuable comments.
- 2.Tao J, Niebieskikwiat D, Varela M, Luo W, Schofield MA, Zhu Y, Salamon MB, Zuo JM, Pantelides ST, Pennycook SP (2009) Direct Imaging of Nanoscale Phase Separation in La0.55Ca0.45MnO3: relationship to Colossal Magnetoresistance. Phys Rev Lett 103:097202. https://doi.org/10.1103/PhysRevLett.103.097202 CrossRefGoogle Scholar
- 10.Sun X, Dong XT, Wang JX, Liu GX (2011) Electrospinning Fabrication and Photocatalytic Properties of LaCrO4 and LaCrO3 Nanobelts. Chem J Chin Univ 32:2262–2267Google Scholar
- 11.Park JW, Lee YK, Stimming U, Singhal SC, Tagawa H, Lehnert W, (1997) In: Proceedings of the fifth international symposium on solid oxide fuel cells, Aachen, Germany, June 2–5, pp 1253–1262Google Scholar
- 12.Simner SP, Hardy JS, Stevensn JW, Armsrong TR, Singhal SC, (1999) In: Proceedings of the sixth international symposium on solid oxide fuel cells, Honolulu, Hawaii, October 17–22, pp 696–705Google Scholar
- 20.Luo P, Zhang B, Zhao Q, He D, Chang A (2017) Characterization and electrical conductivity of La1−xSrxCrO3 NTC ceramics. J Mater Sci: Mater Electron 28:9265–9271Google Scholar
- 22.Martijn HRL, Henny JMB, Henk V (1997) Thermodynamics and transport of ionic and electronic defects in crystalline oxides. J Am Ceram Soc 80:2175–2198Google Scholar
- 41.Tan S, Yue S, Zhang YH (2003) Jahn-Teller distortion induced by Mg/Zn substitution on Mn sites in the perovskite manganites. Phys Lett A 319(2003):530–538Google Scholar
- 48.Adaika K, Omari M (2015) Synthesis and physicochemical characterization of LaCr1-xCuxO3 J Sol-Gel. Sci Technol 75:298–304Google Scholar
- 49.Chadli I, Omari M, Dalo MA, Albiss BA (2016) Preparation by sol-gel method and characterization of Zn-doped LaCrO3 perovskite J Sol-Gel. Sci Technol 80:598–605Google Scholar