Journal ArticleDOI
Bandgap Engineering in Doped ZnO Nanostructures for Dye Sensitized Solar Cell Applications.
S. Fabbiyola,L. John Kennedy +1 more
TLDR
In order to reduce the band gap, transition metal dopants have been incorporated into ZnO so that it changes the photo electrochemical properties and the effect and variation of CBM and VBM in DSSC parameter are discussed.Abstract:
Pure ZnO and dZnO (doped ZnO) systems of type Zn1-xMxO (M = Co, Cu, Fe and Mn) synthesised by co-precipitation method were evaluated for DSSC studies. Tween-80, a non-ionic surfactant which was used during preparation process also acted as binder for coating the nanoparticles on the FTO glass plate. In order to reduce the band gap, transition metal dopants have been incorporated into ZnO so that it changes the photo electrochemical properties. The conduction band edge minimum (CBM) potentials and valence band edge maximum (VBM) potentials were calculated. The CBM and VBM potentials varied with different dopants. The band gap were engineered such that it shifts the conduction band minimum (CBM) to less negative potential than LUMO (Lower Unoccupied Molecular Orbital) of the dye (Rhodamine B). Pure ZnO showed highest open circuit voltage (Voc) of 631.7 mV and short-circuit current density (Jsc) of 3.5031 μA/cm². In case of dZnO, 5% doping showed highest short-circuit current density and highest power conversion efficiency for all dopants (Co, Cu, Fe and Mn). Nanoparticles with remarkable morphologies influence the efficiency of dye sensitized solar cell (DSSC). The DSSC parameters such as open circuit voltage (Voc), short-circuit current density (Jsc), Fill factor (FF) and photovoltaic efficiency (η) was calculated. The effect and variation of CBM and VBM in DSSC parameter are discussed.read more
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Journal ArticleDOI
Development of photo-anodes based on strontium doped zinc oxide-reduced graphene oxide nanocomposites for improving performance of dye-sensitized solar cells
Rojan Savari,Jalal Rouhi,Omid Fakhar,Saeid Kakooei,Davoud Pourzadeh,Okhtay Jahanbakhsh,Saeid Shojaei +6 more
TL;DR: In this article, a dye-sensitized solar cells (DSSCs) using strontium doped zinc oxide-reduced graphene oxide (Sr-doped ZnO/rGO) nanocomposites were designed and characterized.
Journal ArticleDOI
Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals.
Awais Khalid,Pervaiz Ahmad,Abdulrahman I. Alharthi,Saleh Muhammad,Mayeen Uddin Khandaker,Mohammad Rashed Iqbal Faruque,Abdulhameed Khan,Israf Ud Din,Mshari A. Alotaibi,Khalid Alzimami,A. Alfuraih,D.A. Bradley +11 more
TL;DR: In this paper, cobalt-doped zinc oxide microcrystals (MCs) are prepared by using the hydrothermal method from the precursor's mixture of zinc chloride (ZnCl2), cobalt II chloride hexahydrate (CoCl2·6H2O), and potassium hydroxide (KOH).
Journal ArticleDOI
Electrical Characterization of Si/ZnO Nanorod PN Heterojunction Diode
TL;DR: In this article, the electrical characterization of p-Silicon (Si) and n-Zinc oxide (ZnO) nanorod heterojunction diode has been performed.
Journal ArticleDOI
Vertically Aligned Al-Doped ZnO Nanowire Arrays as Efficient Photoanode for Dye-Sensitized Solar Cells
TL;DR: In this paper, the authors report on the synthesis of vertically aligned aluminium-doped ZnO (ZnO:Al) nanowire (NW) thin films on FTO-coated glass substrates and their use as photoanode in dye-sensitized solar cells (DSSC).
Journal ArticleDOI
Appraisement of antimicrobial zinc oxide nanoparticles through Cannabis Jatropha curcasa Alovera and Tinosporacordifolia leaves by green synthesis process
TL;DR: In this article, the phase formation of ZnO nanoparticles were analyzed by X-Ray Diffraction and Rietveld Refinement, and the results showed that secondary metabolites like phenols and terpenoids, polyphenols, phenolic, saponin, alkaloids and glycosides in plant leaves extract working as reducing agents to shape up ZnOs nanoparticles at room temperature.