Role of Mg doping in the structural, optical, and electrical characteristics of ZnO-based DSSCs

Polat, İ.; Yılmaz, S.; Tomakin, Murat; Bacaksız, Emin

doi:10.3906/fiz-1610-35

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…The process parameters can easily be controlled using the chemical bath deposition process, which make it an excellent method for the fabrication of nanorods. The doping of ZnO with a second group including magnesium, calcium, beryllium, and strontium elements has been considered as an effective technique to varying the structural, optical, and electrical properties of ZnO [24][25][26]. Majeed Gul [27] et al reported the band-gap tuning of ZnO nanorods by the addition of Mg from 3.18 eV to 3.32 eV.…”

Section: Introductionmentioning

confidence: 99%

Simulation, Analysis, and Characterization of Calcium-Doped ZnO Nanostructures for Dye-Sensitized Solar Cells

et al. 2020

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In this research article, the authors have discussed the simulation, analysis, and characterization of calcium-doped zinc oxide (Ca-doped-ZnO) nanostructures for advanced generation solar cells. A comparative study has been performed to envisage the effect of Ca-doped ZnO nanoparticles (NP), seeded Ca-doped ZnO nanorods (NR), and unseeded Ca-doped ZnO NR as photoanodes in dye-sensitized solar cells. Simulations were performed in MATLAB fuzzy logic controller to study the effect of various structures on the overall solar cell efficiency. The simulation results show an error of less than 1% in between the simulated and calculated values. This work shows that the diameter of the seeded Ca-doped ZnO NR is greater than that of the unseeded Ca-doped ZnO NR. The incorporation of Ca in the ZnO nanostructure is confirmed using XRD graphs and an EDX spectrum. The optical band gap of the seeded substrate is 3.18 eV, which is higher compared to those of unseeded Ca-doped ZnO NR and Ca-doped ZnO NP, which are 3.16 eV and 3.13 ev, respectively. The increase in optical band gap results in the improvement of the overall solar cell efficiency of the seeded Ca-doped ZnO NR to 1.55%. The incorporation of a seed layer with Ca-doped ZnO NR increases the fill factor and the overall efficiency of dye-sensitized solar cells (DSSC).

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Section: Introductionmentioning

confidence: 99%

Simulation, Analysis, and Characterization of Calcium-Doped ZnO Nanostructures for Dye-Sensitized Solar Cells

et al. 2020

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“…Therefore the bandgap values of Mg-doped ZnO of our samples increase with increases in Mg doping level. And this increase in the bandgap value corresponds to a rise in the e ciency of the fabricated DSSCs[36]. It absorbs the high energy of photons on the surfaces.…”

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The Preparation of Dye Sensitized Solar Cells (DSSC) using Natural dyes Extracted from Terminalia Cattappa Leaves based on Mg doped ZnO as Photoanode.

E¹,

L.²,

Sarathi³

et al. 2021

Preprint

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We report a novel type of Mg-doped ZnO nanoparticles prepared on solvothermal route nanoparticles at different concentrations (2%,4%,6%, and 8%) and used Mg-ZnO as photoanode for dye-sensitized solar cells (DSSC) fabrication. DSSC using Mg-doped ZnO as a semiconductor material and natural dyes Terminalia cattappa as sensitizer were successfully produced. The structural, optical spectra of Mg-ZnO nanopowder were studied using XRD, FESEM-EDX, TEM, SAED patterns, and UV-Visible Spectra, Fourier Transform Infrared (FT-IR). The XRD results show that the crystal size also increases by increasing the dopant concentration of the Mg-doped ZnO sample. The optical spectra show the absorption of the samples increases with the increases of concentration using the UV-Visible analysis and the bandgap energy is calculated by Tauc plot. Mg-doped ZnO nanoparticles prepared at different concentrations were used for the fabrication of DSSC. Furthermore, from the J-V graph, 8% concentration is more effective than other concentrations.

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Fine-tuning of energy gap, FTIR, photoluminescence and photocatalytic behavior of Centella asiatica extract mediated Mn/Mg doped ZnO nanostructure

Subbiah

Muthukumaran²,

Raja³

2019

J Mater Sci: Mater Electron

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Mn, Mg two element doped ZnO nanostructure derived from Centella asiatica leaf extract with Mn = 2% and Mg = 0, 2 and 4% were prepared by bio-synthesis method. Hexagonal structure of ZnO was maintained throughout the Mn/Mg doping without any additional phase. The derived XRD intensity ratio ((I 100 /I 002 ) was almost equal to one for Mg = 2% than other samples which signifies the tuning of size and shape towards the spherical size which was confirmed by electron microscopic images. The higher absorbance in UV and visible wavelengths at Mg = 4% is used to improve the light harvesting capacity and should increase the photocatalytic activity of composite samples. The tuning of energy gap by Mg doping is useful for the fabrication of opto-electronic devices. The presence of Zn-O-Mn/Mg local bond is confirmed by Fourier transform infra-red studies. The existing strong ultra-violet emission band and the visible blue and green emission bands were discussed based on electronic transition and intensity of defect centers. The elevated photocatalytic activity at Mg = 4% is due to the reduced energy gap (3.89 eV) than other samples and hence the higher absorption in the visible region and the creation of defect states.

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Role of Mg doping in the structural, optical, and electrical characteristics of ZnO-based DSSCs

Cited by 7 publications

References 37 publications

Simulation, Analysis, and Characterization of Calcium-Doped ZnO Nanostructures for Dye-Sensitized Solar Cells

Simulation, Analysis, and Characterization of Calcium-Doped ZnO Nanostructures for Dye-Sensitized Solar Cells

The Preparation of Dye Sensitized Solar Cells (DSSC) using Natural dyes Extracted from Terminalia Cattappa Leaves based on Mg doped ZnO as Photoanode.

Fine-tuning of energy gap, FTIR, photoluminescence and photocatalytic behavior of Centella asiatica extract mediated Mn/Mg doped ZnO nanostructure

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