Record Details

<strong>DC electrical properties and non–adiabatic small polaron hopping in V2O5–CdO–ZnO glass nanocomposites</strong>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <strong>DC electrical properties and non–adiabatic small polaron hopping in V2O5–CdO–ZnO glass nanocomposites</strong>
 
Added Entry - Uncontrolled Name Das, Anindya Sundar; Swami Vivekananda Institute of Science & Technology
Roy, Madhab ; Department of Electrical Engineering, Jadavpur University, Jadavpur, Kolkata 700 032, India
Roy, Debasish ; Department of Mechanical Engineering, Jadavpur University, Jadavpur, Kolkata 700 032, India
Bhattacharya, Sanjib ; Department of Engineering Sciences and Humanities, Siliguri Institute of Technology, Darjeeling 734 009, India
Council of Scientific and Industrial Research (CSIR), India
 
Uncontrolled Index Term Glass nanocomposite; polaron hopping; hopping carrier mobility
C conductivity; Activation energy; Density of states; Polaron band width; Electron–phonon coupling constant; Hopping carrier mobility; Hopping carrier concentration
 
Summary, etc. Semiconducting transition metal oxide (TMO) doped glass nanocomposites xV<sub>2</sub>O<sub>5</sub>–(1–x) (0.05CdO–0.95ZnO), x=0.3, 0.5, 0.7 and 0.9 have been prepared by melt quenching method. DC electrical conductivity of as prepared glass nanocomposites is are investigated over a wide temperature range. Formation of small polarons has been confirmed from dc electrical conductivity experimental data, whereas conductivity is due to mainly polaron hopping from V<sup>+4</sup> to V<sup>+5</sup> valence state in these glassy systems. Temperature dependent conductivity data have been analyzed using the small polaron hopping (SPH) model. Low, high temperature activation energy, optical phonon frequency and Debye’s temperature have been determined. Conductivity data have been analyzed in view of Mott’s variable range hopping (VRH) models and Greaves VRH models; the density of states at the Fermi level has been evaluated. Various polaron hopping parameters such as polaron radius, polaron binding energy, polaron band width and polaron coupling constant (γ<sub>P</sub>) have been estimated. It has been ascertained by these estimated quantities and different approaches that the nature of hopping conduction is non–adiabatic variable range hopping of small polarons. The evaluated values of hopping carrier mobility (μ) and hopping carrier concentration (N<sub>C</sub>) are found to depend on composition and temperature.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2019-11-26 12:54:51
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJPAP/article/view/16633
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 57, ##issue.no## 11 (2019): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India © 2015. The Council of Scientific &amp; Industrial Research, New Delhi.