Sparking deposited ZnO nanoparticles as double-layered photoelectrode in ZnO dye-sensitized solar cell

Hongsith, Kritsada; Hongsith, Niyom; Wongratanaphisan, Duangmanee; Gardchareon, Atcharawon; Phadungdhitidhada, Surachet; Singjai, Pisith; Choopun, Supab

doi:10.1016/j.tsf.2013.04.150

Cited by 27 publications

(14 citation statements)

References 22 publications

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“…EIS analysis was performed in a frequency range from 1 Hz to 10,000 Hz with AC amplitude of 20 mV at 100 mW/cm 2 solar light. 15 The recorded EIS spectra of Nyquist plot with different counterelectrode are shown in Figure 5. Normally, Nyquist plot exhibits three semicircles under light stimulation, at high, medium and low frequency regions.…”

Section: Resultsmentioning

confidence: 99%

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Efficiency Enhancement of ZnO Dye-Sensitized Solar Cell Using Platinum Nanoparticles Prepared by Sparking Process

Hongsith¹,

Hongsith²,

Wongratanaphisan³

et al. 2015

j nanosci nanotechnol

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The platinum nanoparticles as a counterelectrode in ZnO dye-sensitized solar cells were studied. The film was prepared by simple and cost-effective sparking technique onto fluorine-doped tin oxide glass substrate as various thickness compared with the platinum counterelectrode which generally prepared by thermal reduction method. The thickness of platinum film was controlled by number of sparking cycles for 5, 15, 25, 35, 50 and 100 cycles under normal atmospheric pressure. The surface morphology and thickness were characterized by Field emission Scanning Electron Microscopy and crystal structure was investigated by X-ray diffractometry. It was found that the power conversion efficiency of the 15 cycles sparking platinum films reached 2.13% which was significantly higher than 1.81% of the reference cell. This efficiency enhancement can be explained by the arising of short-circuit photocurrent due to the increasing of the active surface area and decreasing of charge transfer resistance. Thus, platinum nanoparticles prepared by sparking process can be an alternative counterelectrode for ZnO dye-sensitized solar cells.

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Section: Resultsmentioning

confidence: 99%

“…15 In brief, the ZnO photoelectrodes were prepared by ZnO nanopowder (Nano materials Technology Co. Ltd.) mixing with polyethylene glycol solution to form the ZnO paste. Next, the ZnO paste was prepared by screening technique and then brush it by cutter blade in the block screen on FTO glass substrate.…”

Section: Methodsmentioning

confidence: 99%

Efficiency Enhancement of ZnO Dye-Sensitized Solar Cell Using Platinum Nanoparticles Prepared by Sparking Process

Hongsith¹,

Hongsith²,

Wongratanaphisan³

et al. 2015

j nanosci nanotechnol

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“…In this structure, a ZnO thin film is used as the TCO and a ZnO nanorod layer as semiconductor. There are also a lot of research about ZnO-based DSSC (Hongsith & Choopun., 2010;Martinson et al, 2007). Unfortunately, the ZnO-based DSSC efficiency is much lower compared to that based on TiO 2 .…”

Section: N3mentioning

confidence: 99%

Nanocomposites for Photovoltaic Energy Conversion

Zeng¹,

Gan²

2011

Advances in Composite Materials for Medicine and Nanotechnology

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Induction Composite materialsA composite is a multiphase solid material. It is incorporated by two or more individual materials through physical or chemical methods. The performance of different materials to complement each other will produce synergistic effects (Ivanov et al., 2008;Lu et al., 2010). The overall property of composite materials is better than that of each original material to meet different requirements. These properties include mechanical, electrical, thermal, optical, electrochemical, catalytic behaviors etc. For example (Lu et al., 2010), investigating the synergistic effect of carbon nano-fiber (CNF) and carbon nano-paper on the shape recovery of shape memory polymer (SMP) composite shows that the combination of CNF and carbon nano-paper can improve the thermal and electrical conductivities of the SMP composite, which are much better than each of the components. The individual materials in a composite are referred to as two constituent materials. The two constituent materials are matrix and reinforcement. The matrix material is a frame to support the reinforcement material. So the reinforcement material can keep its relative position. The reinforcement is a functional material which can enhance the matrix properties. Composite metal matrix (substrates) includes aluminum, copper, titanium, magnesium and its alloys and nonmetallic matrix includes synthesized resin, rubber, ceramics, graphite and carbon and so on. Reinforcement mainly includes glass fiber, carbon fiber, boron fiber , aramid fiber, silicon carbide fiber , asbestos fiber, whisker, metal wire and fine grain etc. In order to make use of synergistic effect to improve composite properties, optimum combination of matrix and reinforcement should be chosen. Nanocomposites and their propertiesA nanocomposite is a special composite where one of the phases has one, two or three dimensions less than 100 nanometers (nm, 10 -9 m). A nanocomposite also includes the material where the structures between the different phases that make up the material are in nano-scale (Beecroft & Ober, 1997). In the broadest sense, nanocomposites can also include porous media, colloids, gels and polymers, because in these materials the particles or structures are in nano scale. One nanometer is equivalent to the length to tightly line up www.intechopen.com Advances in Composite Materials for Medicine and Nanotechnology 212 10~100 atoms. Nano-materials include nano-powders, nano-fibers, nano-particles and nanothin films. Their structures are between atom (molecular) size and macro size. Materials in nano-scale have special effects such as quantum size effect, surface effect, small-size effect and macroscopic quantum tunneling effect etc. Quantum size effectQuantum size effect is one of the fundamental physical properties of nano-particles. When the particle size decreases to a nano-scale, the electronic energy levels of the particle atom become discrete and the energy gap becomes wider. This phenomenon is called quantum size effect. This effect does not come into ...

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“…Each component of DSSC is intensively researched in order to enhance power conversion efficiency (PCE). Photoelectrode is considered to be an effective component of DSSC in PCE enhancement due to a key role in controlling photoconversion process such as dye adsorption, light scattering, charge separation, and electron transportation [6][7][8]. To improve the photoconversion process, surface modification of photoelectrode has been successfully applied for PCE enhancement by using various techniques.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells

Sutthana

Wongratanaphisan

Gardchareon

et al. 2016

Journal of Nanomaterials

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Surface modification of porous ZnO photoelectrode using one- and two-step etching process is investigated for enhancing power conversion efficiency of ZnO dye-sensitized solar cells. ZnO films are modified by the diluted NH4OH solutions for one-step etching process and used as photoelectrode of dye-sensitized solar cells. Rough porous films are observed after one-step etching process. The fabricated cells based on the optimized one-step etched films show a significant increase in short-circuit current density. The short-circuit current density is directly changed with amount of dye adsorption, which is related to specific surface area. The etched films exhibit higher specific surface area over two times than nonetched films. Thus, the large specific surface area is the key success for increasing amount of dye adsorption. Internal electrochemical property of fabricated cells is also improved, indicating that chemical surface of ZnO films is modified in the same time. The DSSCs fabricated on two-step etched films with NH4OH and mixed acid HCl : HNO3show the maximum power conversion efficiency of 2.26%. Moreover, fill factor is also increased due to better redox process because of the formation of fine porous structure during the etching process. Therefore, these results implied that the roles of etching processes are improving specific surface area and fine porous formation which can provide better dye adsorption and redox process for dye-sensitized solar cell application.

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Sparking deposited ZnO nanoparticles as double-layered photoelectrode in ZnO dye-sensitized solar cell

Cited by 27 publications

References 22 publications

Efficiency Enhancement of ZnO Dye-Sensitized Solar Cell Using Platinum Nanoparticles Prepared by Sparking Process

Efficiency Enhancement of ZnO Dye-Sensitized Solar Cell Using Platinum Nanoparticles Prepared by Sparking Process

Nanocomposites for Photovoltaic Energy Conversion

Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells

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