Electrical and Optical Transport Characterizations of Electron Beam Evaporated V Doped In2O3 Thin Films

Abstract

Vanadium (5 at. %) doped Indium Oxide (V: In 2 O 3 ) thin films with different thicknesses (50 nm, 100 nm and 150 nm) were prepared onto glass substrate by electron beam evaporation technique in a vacuum of about 4×10 -3 Pa. X-ray diffraction (XRD) pattern revealed that the prepared films of thickness 50 nm are amorphous in nature. Temperature dependence of electrical resistivity was studied in the 300 < T < 475 K temperature range. The films exhibit a metallic behavior in the 300 < T < 380 K range with a positive temperature coefficient of the resistivity (TCR), whereas at T > 380 K, the conduction behavior turns into a semiconductor with a negative TCR. Optical studies revealed that the films of thickness 50 nm possess high transmittance of about 86 % in the near-infrared spectral region. The direct optical band gap lies between 3.26 and 3.00 eV depending on the film thickness.

Effect of annealing temperature and capping ligands on the electron mobility and electronic structure of indium oxide nanocrystal thin films: a comparative study with oleic acid, benzoic acid, and 4-aminobenzoic acid

“…For bandgap engineering, it is vital to understand the electronic structure of the constituent layers. Measurement of band onsets in NC solids can be performed by using optical methods such as UV-visible spectroscopy [17][18][19] or photoluminescence spectroscopy (PL). 20,21 However, with these techniques, the bandgap energy value can only be determined from the energy difference between the conduction band (CB) and the valence band (VB) when they are both known and their exact locations are unknown.…”

Analysis of Dielectric Properties of PVA/PEG/In2O3 Nanostructures for Electronics Devices

“…Indium oxide, In2O3 has many advantages employed for transparent electronic fields, due to the its good optical transparency, broad band gap and low electrical resistivity [8]. Indium oxide, In2O3 has been extensively employed in displays of flat board, optoelectronic changer, displays of liquid crystal, solar cells and photovoltaic devices [9]. The studies on the electrical and optical characteristics of polymers substances included attracted much consideration in view of their appliance in optical and electronic devices [10].…”