Polyol Synthesis of Zinc Oxide-Graphene Composites: Enhanced Dye- Sensitized Solar Cell Efficiency

Philip, Moab Rajan; Nguyen, Hieu Pham Trung; Babu, R.; Krishnakumar, V.; Bui, Thang Ha Quoc

doi:10.2174/2405461503666180507124310

Cited by 9 publications

(4 citation statements)

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“…75,76 It is a challenging task to the researchers to control microstructural characteristics along with product composition for the nanomaterials. A variety of liquid phase synthesis routes, such as sol-gel, 77 combustion, 78 polyol, 79 co-precipitation, 80 hydrothermal, 81 solvothermal, 28 microemulsion, 82 sonochemistry ,83,84 and environmentally benign methods 85 are employed and found to be more effective to prepare nanomaterials with controlled particle size and shape. Tobin J.…”

Section: Microwave Assisted Synthesis Of Nanomaterialsmentioning

confidence: 99%

Review—Development of Inorganic Nanostructures by Microwave Synthesis Technique

Rao

Satyanarayana

2021

ECS J. Solid State Sci. Technol.

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We present an overview of microwave-assisted synthesis method to develop inorganic nanostructured materials, which have received great interest due to their potential applications in different fields of science and technology. The current trend for the adoption of eco-friendly synthesis methods for the preparation of nanomaterials has thrown a challenge to develop synthetic methods that offer significant reduction in reaction time, lower energy consumption and less use of toxic chemicals. The microwave (MW) assisted synthesis route can play the role of a potential green synthesis approach to prepare inorganic nanostructured materials and their composites. In addition, the MW assisted route provides uniform heating throughout the reaction mixture and minimizes the non-uniform temperature profile, which results in the formation of uniform small nanoparticles. This review discusses the basic principles of MW synthesis to understand the MW heating mechanism. In addition, we discuss recent progress on the development of inorganic nanostructures in liquid phase by MW synthesis technique. Finally, we present the application of microwave synthesized nanomaterials in the development of battery technology, followed by safety features and future aspects of MW synthesis.

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Section: Microwave Assisted Synthesis Of Nanomaterialsmentioning

confidence: 99%

Review—Development of Inorganic Nanostructures by Microwave Synthesis Technique

Rao

Satyanarayana

2021

ECS J. Solid State Sci. Technol.

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“…ZnO has superior optical and electrical properties that include high electron mobility in the order of 1500 cm 2 V −1 s −1 at room temperature, wide band gap energy of 3.3 eV, and a high excitation (electronhole) binding energy of 60 meV. However, to overcome the drawback of poor catalytic activity in ZnO due to its photoelectron recombination, many studies had incorporated graphene into the ZnO matrix to its efficiency and reduce the electron recombination process [49,50]. There are two main method for fabrication of ZnO/rGO composite: the in-situ method, which used the Zn(II) precursor salts and mixed with GO or rGO [51,52], and the ex-situ method, which used the ZnO nanomaterials (nanoparticles, nano wires, nanorods, etc.)…”

Section: Graphene For the Fabrication Of Anodes In Dsscsmentioning

confidence: 99%

“…The characteristic peaks of GO were reduced or disappeared on the spectra of GO and ZnO/rGO, indicating that the functional group of GO was reduced to create rGO and ZnO/rGO. The FTIR spectrum of ZnO/rGO3 revealed two typical peaks at 507.14 and 433.23 cm −1 , corresponding to the Zn-O vibration of hexagonal wurtzite structure of ZnO [49].…”

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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“…In [27][28][29], Zn-Cu-In-Se quantum dots are proposed to increase the energy conversion efficiency in PTEG-1 perovskite cell where the ratio of Cu to In is increased to obtain an efficiency more than 12%. In [30][31][32], a structure using modified connected Nano-particles is suggested which improves the solar cell performance. In these papers, using combination of TiO 2 with 5-nm, hydraulic acid in photo-electrode of TiO 2 with thickness of 20 nm and ratio of TiO 2 /HCL as 3:1, energy conversion efficiency equal to 3.19% with the congestion of 0.468 is obtainable.…”

Section: Introductionmentioning

confidence: 99%

Optimization of sensitized perovskite solar cells with Zn–Cu–In–Se quantum dots to increase quantum efficiency

Hajian

Rajamand

2021

J Mater Sci: Mater Electron

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Perovskite solar cells are efficient units in systems with modern renewable energy sources. Increasing the efficiency of solar cells is important in photovoltaic (PV) systems. In this paper, the effect of Zn-Cu-In-Se quantum dots on the performance of thin-film perovskite solar cells is analyzed. The effect of the specification of the perovskite layer, electrical connections and quantum dots has been discussed using modeling of solar cell open-circuit voltage, shortcircuit current, spectral response, efficiency, and fill factor. Based on the simulation results, without using Zn-Cu-In-Se quantum dots, the optimal performance occurs in high and low electrode work function as 3.5 eV and 5.93 eV achieving 21.53% energy conversion efficiency. In the proposed perovskite solar cell including Zn-Cu-In-Se quantum dots, 33.56% efficiency can be obtained in the same conditions. More intensity of the electric field inside the perovskite layer and the quantum dots causes to increase the energy conversion efficiency compared to the case without quantum dots. The achievable power in case of Zn-Cu-In-Se quantum dots is 0.275 mW/cm 2 , which is 35% more than the case without these quantum dots in the solar cell. As shown in simulation results section, many improvements can be achieved via using Zn-Cu-In-Se quantum dots in the perovskite solar cell.

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Polyol Synthesis of Zinc Oxide-Graphene Composites: Enhanced Dye- Sensitized Solar Cell Efficiency

Cited by 9 publications

References 0 publications

Review—Development of Inorganic Nanostructures by Microwave Synthesis Technique

Review—Development of Inorganic Nanostructures by Microwave Synthesis Technique

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

Optimization of sensitized perovskite solar cells with Zn–Cu–In–Se quantum dots to increase quantum efficiency

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