Synthesis, luminescence properties and EPR investigation of hydrothermally derived uniform ZnO hexagonal rods

Reddy, A. Jagannatha; Krishna, R. Hari; Nagabhushana, B.M.; Kokila, M.K.; Nagabhushana, H.; Shivakumara, C.; Chakradhar, R.P.S.

doi:10.1016/j.saa.2014.11.088

Cited by 10 publications

(1 citation statement)

References 39 publications

(39 reference statements)

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“…These levels are sensitive to the concentration of oxygen vacancies, in such a way that increasing oxygen vacancies concentration, increases the number of intraband levels and, consequently, increases the absorption in longer wavelengths spectra. The existence of oxygen vacancies in the co-doped samples was confirmed by using ESR [64][65][66], at room temperature with an X-band frequency (9.4 GHz), and the signals for (BNdTFC-x) samples are shown in figure 8. No resonance signal was observed for the (BiT) and BNdT samples, which may be due to a non-detectable amount of oxygen vacancies [37].…”

Section: Optical Propertiesmentioning

confidence: 90%

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications

Alkathy¹,

Zabotto²,

Lente³

et al. 2020

J. Phys. D: Appl. Phys.

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Reducing bandgap energy in ferroelectric materials has become an important commitment to improve the performance of the photovoltaic solar cell. This study reports the effect of the transition metals Co and Fe ions co-doping on the structure and bandgap of neodymium-modified Bi4Ti3O12 based oxide. The quantitative structural analyses by XRD confirms well-crystallized samples with orthorhombic crystal structure based on B2cb space group. Optical properties were measured by a UV–vis spectrometer. The oxygen vacancies presence and the Fe and Co valence states estimation were carried out by electron spin resonance. The incorporation of Co and Fe ions into Bi3.25Nd0.75Ti3O12 significantly modified the bandgap structure, promoting a red-shift and lower energies absorption which was related to the changes in tilting angles, bond lengths, octahedral distortions and oxygen vacancies formation, still maintaining a ferroelectric spontaneous polarization. To our knowledge, it is a new approach to link quantitively the octahedra distortion to the bandgap decreasing for Aurivillius compounds providing a newly available method of manipulating the bandgap tuning on the ferroelectric oxide’s materials.

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Section: Optical Propertiesmentioning

confidence: 90%

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications

Alkathy¹,

Zabotto²,

Lente³

et al. 2020

J. Phys. D: Appl. Phys.

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Synthesis of Oxide Nanotubes/Nanorods by Hydrothermal Method

Anastasescu

Mihaiu

Preda

et al. 2016

1D Oxide Nanostructures Obtained by Sol-Gel and Hydrothermal Methods

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Synthesis and Characterization of Undoped and Doped (Mn, Cu, Co) ZnO Nanoparticles: An EPR Study

Çolak

Aktürk

2016

Advanced Structured Materials

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Synthesis, luminescence properties and EPR investigation of hydrothermally derived uniform ZnO hexagonal rods

Cited by 10 publications

References 39 publications

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications

Synthesis of Oxide Nanotubes/Nanorods by Hydrothermal Method

Synthesis and Characterization of Undoped and Doped (Mn, Cu, Co) ZnO Nanoparticles: An EPR Study

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Synthesis, luminescence properties and EPR investigation of hydrothermally derived uniform ZnO hexagonal rods

Cited by 10 publications

References 39 publications

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi3.25Nd0.75Ti3O12 ferroelectrics for photovoltaic applications

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi3.25Nd0.75Ti3O12 ferroelectrics for photovoltaic applications

Synthesis of Oxide Nanotubes/Nanorods by Hydrothermal Method

Synthesis and Characterization of Undoped and Doped (Mn, Cu, Co) ZnO Nanoparticles: An EPR Study

Contact Info

Product

Resources

About

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications

Octahedral distortion and oxygen vacancies induced band-gap narrowing and enhanced visible light absorption of Co/Fe co-doped Bi_3.25Nd_0.75Ti₃O₁₂ ferroelectrics for photovoltaic applications