title: Spectroscopic analysis, structural, microstructural, optical and electrical properties of Zn-doped In2O3 thin films.
abstract: In this work, highly transparent conducting un-doped and Zn-doped In2O3 thin films were prepared onto glass substrate using spray pyrolysis method. Structural, morphological, optical and electrical properties were characterized by using XRD, FT-IR, FT-Raman, SEM, AFM, UV-visible, PL and Hall Effect measurement techniques. X-ray diffraction analysis showed that the deposited films were polycrystalline with cubic structure having (222) as preferred orientation. SEM and AFM analyses showed smooth surfaces but the surface roughness of the films increased due to Zn doping. The average optical transmittance of the films was above 94% in the visible range. The optical band gap decreased from 3.62 to 3.28 eV with increasing Zn concentration. The photoluminescence spectra displayed violet-blue emission peaks at around 418-440 nm for all films. The electrical parameters like the resistivity, mobility and carrier concentration were found as 6.4×10(-4) Ω cm, 168 cm(2)/Vs and 9.4×10(20) cm(-3), respectively for In2O3:Zn film deposited at 9 at.%. The present results showed that the obtained thin films could be used as an optoelectronic material.
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu, India.
authors.forename: M
authors.initials: M
authors.lastname: Jothibas
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu, India. Electronic address: cmanoharan1@rediffmail.com.
authors.forename: C
authors.initials: C
authors.lastname: Manoharan
authors.affiliation: Department of Physics, A.V.C. College, Mayiladuthurai, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Ramalingam
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Dhanapandian
authors.affiliation: Nanotechnology Centre, University of Bahrain, Bahrain; Department of Physics, College of Science, University of Bahrain, Bahrain.
authors.forename: M
authors.initials: M
authors.lastname: Bououdina
mesh_terms: D004560:Electricity; D007204:Indium / Q000737:chemistry*; D049449:Luminescence; D018625:Microscopy, Atomic Force; D055620:Optical Phenomena; D012031:Refractometry; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D007204:Indium; C047711:indium oxide; D015032:Zinc
keywords: Indium oxide; Physical and electrical properties; Spray pyrolysis; Zinc