Structural, optical and electrical properties of pure and Fe doped V 2 O 5 nanoparticles for junction diode fabrications
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Structural, optical and electrical properties of pure and Fe doped V2O5 nanoparticles for junction diode fabrications I. Pradeep1 · E. Ranjith Kumar2 · N. Suriyanaranan3 · Ch. Srinivas4 · N. Venkata Rao5 Received: 12 January 2018 / Accepted: 31 March 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Structural, optical and electrical studies of V 2O5 and FexV2O5 (x = 5%) nanostructures synthesized by a wet chemical method have been reported. The synthesized nanostructures were characterized by XRD, SEM–EDX, HRTEM, XPS, UV(DRS), FT-IR, PL, TG–DTA, AC and DC conductivity study’s. The anorthic phase was observed in the XRD patterns of undoped and Fe doped samples which are prepared at low temperature. This anorthic phase was reduced with the heat treatment and gradually transformed into orthorhombic phase in the samples annealed at 600 °C for 1 h. The change in the surface morphology in the present samples from micro-rod to nanorods network seems to be dependent on the substitution of Fe. As observed from the PL analysis that the ultraviolet (UV) emission intensity was found to be decreased and exhibited a blue shift with the increase of Fe concentration. The analysis of AC and DC conductivity measurements recorded at room temperature in the temperature range of 303–403 K, revealed that the activation energy is high for Fe doped V2O5 compared to undoped V2O5. The junction diodes of n-V2O5/p-Si and V 2O5:Fe/p-Si was successfully prepared by the nebulizer spray pyrolysis method. The (I–V) characteristics of nonlinear and asymmetric nature revealed the Schottky diode based behavior for pure and doped samples.
1 Introduction In the last few decades, the miniature of electronic devices is of great interest that surely preludes a way to search for novel materials in use. Among different functional novel materials nano-scale metal oxides have drawn the attention of many researchers to investigate their structural, optical, electrical properties, etc. Under nanoscale dimensions, fine * E. Ranjith Kumar [email protected] * N. Suriyanaranan [email protected] 1
Department of Physics, Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu 641008, India
2
Department of Physics, Dr. N.G.P. Institute of Technology, Coimbatore, Tamil Nadu 641048, India
3
Department of Physics, Government College of Technology, Coimbatore, Tamil Nadu 641 013, India
4
Department of Physics, Sasi Institute of Technology & Engineering, Tadepalligudem 534 101, India
5
Department of Electronics and Communication Engineering, Sasi Institute of Technology & Engineering, Tadepalligudem 534 101, India
particle effects are predominant in nano sized particles [1]. The quantum confinement is often studied one of the fine particle effects because the optical properties associated with nano sized particles can easily be tuned [2, 3]. Among the metal oxide nanoparticles (NPs), Vanadium oxides are the promising metal oxides due to their exceptional optoelectrical properties. The uniq
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