Synthesis and fabrication of Mg-doped ZnO-based dye-synthesized solar cells

In this paper, a Mg-doped ZnO (MZO) thin film is prepared by a simple solution process under ambient conditions and is used as the window layer for PbS solar cells due to a wide n-type bandgap. Moreover, a thin layer of ZnO nanocrystals (NCs) was deposited on the MZO to reduce carrier recombination at the interface for inverted PbS quantum dot solar cells with the configuration Indium Tin Oxides (ITO)/MZO/ZnO NC (w/o)/PbS/Au. The effect of film thickness and annealing temperature of MZO and ZnO NC on the performance of PbS quantum dot solar cells was investigated in detail. It was found that without the ZnO NC thin layer, the highest power conversion efficiency(PCE) of 5.52% was obtained in the case of a device with an MZO thickness of 50 nm. When a thin layer of ZnO NC was introduced between MZO and PbS quantum dot film, the PCE of the champion device was greatly improved to 7.06% due to the decreased interface recombination. The usage of the MZO buffer layer along with the ZnO NC interface passivation technique is expected to further improve the performance of quantum dot solar cells.

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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.

10.21203/rs.3.rs-589288/v1 ◽

2021 ◽

Author(s):

Selva Esakki E ◽

Renuga Devi L ◽

Sarathi S ◽

Meenakshi Sundar S

Keyword(s):

Solar Cells ◽

Zno Nanoparticles ◽

Dye Sensitized Solar Cells ◽

Optical Spectra ◽

Natural Dyes ◽

Dye Sensitized ◽

Uv Visible ◽

Doped Zno ◽

Sensitized Solar Cells ◽

Mg Doped

Abstract 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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Banyan Root Structured Mg-Doped ZnO Photoanode Dye-Sensitized Solar Cells

The Journal of Physical Chemistry C ◽

10.1021/jp308847g ◽

2013 ◽

Vol 117 (6) ◽

pp. 2600-2607 ◽

Cited By ~ 59

Author(s):

C. Justin Raj ◽

Kandasamy Prabakar ◽

S. N. Karthick ◽

K. V. Hemalatha ◽

Min-Kyu Son ◽

...

Keyword(s):

Solar Cells ◽

Dye Sensitized Solar Cells ◽

Dye Sensitized ◽

Doped Zno ◽

Sensitized Solar Cells ◽

Mg Doped

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Doping of Mg on ZnO Nanorods Demonstrated Improved Photocatalytic Degradation and Antimicrobial Potential with Molecular Docking Analysis

Nanoscale Research Letters ◽

10.1186/s11671-021-03537-8 ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Muhammad Ikram ◽

Sidra Aslam ◽

Ali Haider ◽

Sadia Naz ◽

Anwar Ul-Hamid ◽

...

Keyword(s):

Molecular Docking ◽

Functional Groups ◽

Zno Nanorods ◽

Docking Studies ◽

Trapping Efficiency ◽

Wurtzite Phase ◽

Binding Score ◽

Doped Zno ◽

Co Precipitation ◽

Mg Doped

AbstractVarious concentrations of Mg-doped ZnO nanorods (NRs) were prepared using co-precipitation technique. The objective of this study was to improve the photocatalytic properties of ZnO. The effect of Mg doping on the structure, phase constitution, functional groups presence, optical properties, elemental composition, surface morphology and microstructure of ZnO was evaluated with XRD, FTIR, UV–Vis spectrophotometer, EDS, and HR-TEM, respectively. Optical absorption spectra obtained from the prepared samples showed evidence of blueshift upon doping. XRD results revealed hexagonal wurtzite phase of nanocomposite with a gradual decrease in crystallite size with Mg addition. PL spectroscopy showed trapping efficiency and migration of charge carriers with electron–hole recombination behavior, while HR-TEM estimated interlayer d-spacing. The presence of chemical bonding, vibration modes and functional groups at the interface of ZnO was revealed by FTIR and Raman spectra. In this study, photocatalytic, sonocatalytic and sonophotocatalytic performance of prepared NRs was systematically investigated by degrading a mixture of methylene blue and ciprofloxacin (MBCF). Experimental results suggested that improved degradation performance was shown by Mg-doped ZnO NRs. We believe that the product synthesized in this study will prove to be a beneficial and promising photocatalyst for wastewater treatment. Conclusively, Mg-doped ZnO exhibited substantial (p < 0.05) efficacy against gram-negative (G-ve) as compared to gram-positive (G+ve) bacteria. In silico molecular docking studies of Mg-doped ZnO NRs against DHFR (binding score: − 7.518 kcal/mol), DHPS (binding score: − 6.973 kcal/mol) and FabH (− 6.548 kcal/mol) of E. coli predicted inhibition of given enzymes as possible mechanism behind their bactericidal activity.

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