Electrodeposited ZnCdO thin films as conducting optical layer for optoelectronic devices

High Aspect Ratio Ternary Zn1–xCdxO Nanowires by Electrodeposition for Light-Emitting Diode Applications

“…In their study, Li et al observed a gradual shift of the band gap from 3.37 to 3.25, 3.10, and 2.91 eV for x values of 0, 5, 9, and 15 atom % in Zn 1– x Cd x O alloys. In our experiment this shift is less marked but is in general agreement with previous works. ,− The decrease in total optical transmittance with increasing Cd incorporation into ZnO NWs could be explained by possible appearance of more oxygen vacancies and Zn or Cd interstices, which lead to higher carrier concentration and accordingly to lower optical transmittance . Transparency of alloyed ZnO in the 1500–2100 nm interval (see Figure ) decreases with increasing doping level, i.e., with an increasing concentration of free carriers in Zn 1– x Cd x O layers.…”

“…Several techniques such as thermal evaporation, chemical vapor deposition, thermolysis, chemical bath deposition, spray pyrolysis, and electrochemical deposition have been employed to fabricate Cd–ZnO material. − Among the growth deposition techniques of Zn 1– x Cd x O, electrochemical deposition is a powerful approach with huge potential for industrialization due to its simplicity, cost-efficiency, reproducibility, large-area deposition, low synthesis temperature, and good-quality nanomaterial. − , Moreover, electrochemical deposition allows mixing of the chemicals at the atomic level, thus reducing the possibility of secondary phase formation.…”

“…It is of importance to mention that, up to now, there have been few experimental studies on the properties of Cd-alloyed ZnO films grown by the electrochemical method, − and to the best of our knowledge, there is only one report on the synthesis of Zn 1– x Cd x O nanorods . Tortosa et al obtained ternary single phase Zn 1– x Cd x O alloy semiconductor films by a cost-effective electrodeposition method onto conductive glass substrates.…”

“…They observed a controlled red shift of the optical gap with an increase in the amount of Cd present in Zn 1Àx Cd x O films. Mari et al 23 synthesized ZnCdO thin films by electrodeposition and reported on the influence of the Cd content on structural, electrical, and optical properties of the ZnCdO layers. Experimental results by Mari et al 23 demonstrated that the electrodeposition technique is effective to obtain ternary ZnCdO films (with Cd content between 1% and 9%) hexagonal ZnO phase.…”

“…Mari et al 23 synthesized ZnCdO thin films by electrodeposition and reported on the influence of the Cd content on structural, electrical, and optical properties of the ZnCdO layers. Experimental results by Mari et al 23 demonstrated that the electrodeposition technique is effective to obtain ternary ZnCdO films (with Cd content between 1% and 9%) hexagonal ZnO phase. Li et al 21 reported the electrochemical preparation of Zn 1Àx Cd x O nanorods forming aggregates on a Cu substrate with controlled optical properties and with adjustable band gap by changing Cd content between 0 and 15%.…”