Properties of a facile growth of spray pyrolysis-based rGO films and device performance for Au/rGO/n-InP Schottky diodes

Çatir, Cimilli; Esra, Fulya

doi:10.1007/s10854-020-04843-0

Cited by 7 publications

(2 citation statements)

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“…In this study, the higher values of n (15.51 and 16.81) for the Ti-TiO 2 -rGO-2h and Ti-TiO 2 -rGO-3h structures indicate that they may undergo several more recombination processes, dramatically incising the ideality factor. For Ti-TiO 2 -rGO-1h, an ideality factor of about 2.31, which is very close to the normal range (1 < n < 2), is clearly highlighted with a reduced number of traps/defects in the quasineutral zone [38,41]. The move of the junction away from an ideal value can be explained by the growth of the surface area and the TiO 2 layer generated by the increase in the etching time.…”

Section: Optical and Electrical Propertiesmentioning

confidence: 71%

“…The rectifying nature of the TiO 2 /rGO heterojunction and an increase in the asymmetry between the forward and reverse biases is highlighted more for the Ti-TiO 2 -rGO-1h structure, as presented in Figure 5b; for the Ti-TiO 2 -rGO-2h and Ti-TiO 2 -rGO-3h structures, a slight rectification behavior appeared (Figure 5d,f) [37]. In order to evaluate the characteristics of the TiO 2 /rGO junction, the thermionic emission relation from the current-voltage was used [38]. From the Log (I)-V plot (Figure 5b,d,f), the ideality factor (n) and the reverse saturation current (I 0 ) are calculated as per our previous research [32].…”

Section: Optical and Electrical Propertiesmentioning

confidence: 99%

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In Situ Deposition of Reduced Graphene Oxide on Ti Foil by a Facile, Microwave-Assisted Hydrothermal Method

et al. 2022

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Reduced graphene oxide (rGO) was successfully deposited in situ onto Ti foil via a microwave-assisted hydrothermal method for the development of Ti-TiO2-rGO composite structures. The TiO2 crystallin layer was produced by the thermal oxidation of titanium foil in the presence of 0.5 M hydrofluoric acid in a controlled atmosphere consisting of a mixed flow gas of Ar and O2 at 500 °C. A great advantage of using the microwave-assisted hydrothermal method for obtaining composite structures is the fast and uniform heating mode, which prevents the aggregation of graphene layers. Specific analyses, such as X-ray diffraction, UV-VIS analysis, and SEM morphology, were used to investigate the structural, optical, and morphological characteristics of the composites. The I-V measurements of the Ti-TiO2-rGO composite structures were performed using forward bias with an applied voltage between −3 V and +3 V and a step rate of 10 mV/s. Moreover, the electrochemical behavior was obtained by cyclic voltammetry in a 1 M KNO3 supporting electrolyte and in the presence of 4 mM K3Fe(CN)6 to determine the electroactive surface area and apparent diffusion coefficient. The charge transfer resistance was investigated via electrochemical impedance spectroscopy (EIS) in a 0.1 M Na2SO4 supporting electrolyte and within a frequency range of 100 kHz to 0.1 Hz to confirm the role of rGO on the electrode’s surface. This study provided new insights into the development of high-performance and cost-effective Ti-TiO2-rGO structures both for the development of electrochemical electrodes and gas sensors.

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Section: Optical and Electrical Propertiesmentioning

confidence: 71%