To investigate opulence of graphene in ZnO/graphene nanocomposites based dye sensitized solar cells

Siwach, Bulkesh; Mohan, Devendra

doi:10.1007/s10854-017-6946-y

Cited by 8 publications

(9 citation statements)

References 42 publications

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“…The ZnO nanopowder was synthesized using sol-gel process described elsewhere [10]. The coating procedure of ZnO photoanode film on indium tin oxide (ITO) was explained in the previous studies [19].…”

Section: Methodsmentioning

confidence: 99%

“…The oxidized dye is regenerated by capturing electron from the redox coupled electrolyte. The electrolyte gets reduced by collecting electron from the counter electrode material [4,10,20].…”

Section: Methodsmentioning

confidence: 99%

“…In addition, ZnO has higher electron mobility, high electron diffusivity, more excitation binding energy, stability against photo-corrosion, availability at lower cost, and lower recombination rate as compared to TiO2. Therefore, ZnO can be used as photoanode material in low-cost and highly efficient DSSCs [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Different Organic Dyes and their Impregnation Periods on Photovoltaic Performance of ZnO Based Dye Sensitized Solar Cells

Siwach¹,

Mohan²,

Barala³

et al. 2018

Asian J. Chem.

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Light absorption in dye sensitized solar cells (DSSCs) depends significantly on the type of sensitizer and its impregnation period. Since dye plays a vital role to broaden the light absorbance of semiconductor photoanode towards the visible region of spectra. The present study reports the effect of two types of organic dyes namely N719 and N749 (black dye) as well as their impregnation periods of 12 h and 24 h, respectively, on the photovoltaic performance of zinc oxide based DSSCs. Zinc oxide photoanode films were deposited on indium tin oxide substrates by doctor blade technique. The DSSC impregnated with N719 dye for the period of 24 h exhibited the highest value of photon conversion efficiency. This happened as the photoanode film impregnated with N719 dye for 24 h exhibited the highest optical absorption in the UV region as well as in visible region of spectra. The solar cell impregnated with N719 dye for the period of 24 h performed with the highest short-circuit density (JSC) of 9.38 mA/cm 2 , fill factor (FF) of 0.50, open circuit voltage (VOC) of 0.71 V and conversion efficiency (η) of 3.32 %.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effect of Different Organic Dyes and their Impregnation Periods on Photovoltaic Performance of ZnO Based Dye Sensitized Solar Cells

Siwach¹,

Mohan²,

Barala³

et al. 2018

Asian J. Chem.

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“…To further understand the energy diagram of ZnO/ graphene-based DSSCs, Figure 5 displays a typical energy level of the DSSCs using an iodide/triiodide-based redox electrolyte solution and N749 as a sensitizer. 52 The ITO substrate and graphene have relatively similar work functions of À4.8 and À4.4 eV, respectively. Therefore, graphene allows the injected electrons to flow down to the ITO.…”

Section: Optical Properties Of Zno/graphene Derivativesmentioning

confidence: 99%

Zinc oxide/graphene nanocomposite as efficient photoelectrode in dye‐sensitized solar cells: Recent advances and future outlook

Mahalingam

Low

Omar

et al. 2022

Intl J of Energy Research

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Summary Dye‐Sensitized Solar Cells (DSSCs), also known as Grätzel cells, are a third‐generation photovoltaic technology that has garnered extensive interest due to its simplicity of fabrication, economical, and relatively high power conversion efficiency (PCE). The PCE of the photovoltaic cells is primarily related to the architecture of the cells, as well as the electrodes and electrolyte employed. Using zinc oxide (ZnO) coupled with two‐dimensional graphene as photoelectrode enables efficient charge transfer and minimizes electron–hole recombination in the DSSCs, resulting in improved performance. This review outlines the feasibility and performance enhancement of ZnO/graphene nanocomposite and its derivatives as photoelectrode for DSSCs. The structural features, optical properties, electron transport, and dye interaction of the ZnO/graphene nanocomposite‐based photoelectrode were considered in this review. In addition, the limitations of ZnO/graphene derivatives as photoelectrodes and their solutions were extensively discussed, as well as their prospects. The ZnO/graphene‐based photovoltaic cells exhibit an efficiency of up to 11.5% under different dyes and electrolytes. The recent progress achieved with this photoelectrode, which is a viable substitute for titanium dioxide (TiO2), is also thoroughly reviewed.

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“…ZnO/rGO4 DSSC demonstrated a low efficiency, because transmittance of anode was drastically decreased, due to the high amount of rGO in ZnO/rGO4 composite. Besides, the excessive amount of rGO could become the recombination center that increased the recombination reactions [55,56]. Therefore, the appropriate rGO weight percent in the composite was 1%, corresponding to the ZnO/rGO3 DSSC.…”

Section: Graphene For the Fabrication Of Anodes In Dsscsmentioning

confidence: 99%

Graphene-Based Material for Fabrication of Electrodes in Dye-Sensitized Solar Cells

Hieu¹

2021

Solar Cells - Theory, Materials and Recent Advances

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Graphene-based materials have been widely studied for the fabrication of electrodes in dye-sensitized solar cells (DSSCs). The use of graphene in the cathode is to reduce the amount of platinum (Pt), which in turn is expected to reduce the production cost of DSSCs. Additionally, in the structure of cathode, graphene acts as a supporting material to reduce the particle sizes of Pt and helps to maintain the high efficiency of DSSCs. For anodes, graphene can provide a more effective electron transfer process, resulting in the improvement of efficiency of DSSCs. In this chapter, the use of graphene-based materials for fabrication of cathodes and anodes in DSSCs, including platinum/reduced graphene oxide composite (Pt/rGO) and zinc oxide/reduced graphene oxide composite (ZnO/rGO) is discussed. The fabricated DSSCs were tested using current density-voltage (J-V) curves to evaluate the efficiency. The results of efficiency demonstrate that Pt/rGO is the potential material for fabrication of cathode in DSSCs, which helps to reduce the amount of Pt and maintain the high efficiency. The efficiency values of DSSCs fabricated from ZnO/rGO anodes show that the incorporation of reduced graphene oxide in the ZnO could improve the performance of DSSCs.

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To investigate opulence of graphene in ZnO/graphene nanocomposites based dye sensitized solar cells

Cited by 8 publications

References 42 publications

Effect of Different Organic Dyes and their Impregnation Periods on Photovoltaic Performance of ZnO Based Dye Sensitized Solar Cells

Effect of Different Organic Dyes and their Impregnation Periods on Photovoltaic Performance of ZnO Based Dye Sensitized Solar Cells

Zinc oxide/graphene nanocomposite as efficient photoelectrode in dye‐sensitized solar cells: Recent advances and future outlook

Graphene-Based Material for Fabrication of Electrodes in Dye-Sensitized Solar Cells

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