Optical characteristics with high accuracy of diluted Cr doped In2O3 thin films using spectroscopic ellipsometry for optoelectronic devices

Chemical reactions were used to create (In1-xCrx)(2)O-3 powder with (x = 0, 2, 4, 6, 8 and 10 at.%), and an electron beam gun was used to evaporate thin films in a high vacuum. The impacts of Cr doping concentration on the structure and optics characteristics of the In(2)O(3 )layers were investigated. All Cr-doped In2O3 films had the cubic structure of In2O3 without secondary phases according to the X-ray diffraction findings. A study of the chemical makeup of each Cr-doped In(2)O(3 )compound revealed that they were all almost stoichiometric. To extract the optical characteristics and energy gap, a three-layer model simulated the experimental data of the spectroscopic ellipsometer. With increasing the Cr doping concentration, the optical band gap shifted the blue was seen. With increasing Cr content, the band gap in the (In1-xCrx)(2)O-3 thin film was raised from 3.21 to 3.46 eV. Using the Murmann's exact equation, the refractive index and extinction coefficient that were obtained through spectroscopic ellipsometry could be utilized to fit the measured transmission data. As a function of Cr content, the change in structural parameters was be used to explain the change in the optical parameters. The (In1-xCrx)(2)O-3 thin film are recommended for optoelectronic devices due to its tunability in the structural and optical properties.

Automated summary

This study synthesized (In1-xCrx)(2)O-3 powders and thin films with different Cr doping concentrations using chemical reactions and investigated the effects of Cr concentration on the structure and optical properties of In(2)O(3 )layers. The results showed a blue shift in the optical band gap with increasing Cr doping concentration, indicating the potential for tunability in the structural and optical properties of the thin films.