Construction of 3-dimensional ZnO-nanoflower structures for high quantum and photocurrent efficiency in dye sensitized solar cell

Kılıç, Bayram; Güneş, Taylan; Besirli, Ilknur; Sezginer, Merve; Tüzemen, Sebahattin

doi:10.1016/j.apsusc.2013.12.065

Cited by 53 publications

(16 citation statements)

References 19 publications

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“…Umar et al synthesized ZnO nanoflowers as photo‐anode material for DSSC by using hydrothermal method, and achieving cell efficiency of 1.38% . Kilic et al discovered the variation in the morphology of ZnO nanostructures as a function of pH value during the hydrothermal growth, from nanoflower (pH 10.0) to nanowire (pH 11.0) . Much higher efficiency was attained for DSSC with 3D ZnO nanoflowers ( η = 5.12%) as photo‐anode compared with 1D ZnO nanowires ( η = 2.22%), which was attributed to the superior light‐absorbing ability of nanoflower structure with much large larger surface area.…”

Section: Photo‐anodementioning

confidence: 99%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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Summary Dye‐sensitized solar cell (DSSC) attracts immense interest in the last few decades due to its various attractive features such as low production cost, ease of fabrication and relatively high conversion efficiency, which make it a strong competitor to the conventional silicon‐based solar cell. In DSSC, photo‐anode performs two important functions, viz. governs the collection and transportation of photo‐excited electrons from dye to external circuit as well as acts as a scaffold layer for dye adsorption. The photo‐anode usually consists of wide band gap semiconducting metal oxides such as titanium dioxide (TiO2) and zinc oxide (ZnO) deposited on the transparent conducting oxide substrates. The morphology and composition of the semiconductor oxides have significant impact on the DSSC photovoltaic performance. Therefore, enormous research efforts have been undertaken to investigate the influences of photo‐anode modifications on DSSC performance. The modifications can be classified into three categories, namely interfacial modification through the introduction of blocking and scattering layer, doping with non‐metallic anions and metallic cations and replacing the conventional mesoporous semiconducting metal oxide films with one‐dimensional or two‐dimensional nanostructures. In the present review, the previously mentioned modifications on photo‐anode are summarized based on the recent findings, with particular emphasis given to published works for the past 5 years. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Photo‐anodementioning

confidence: 99%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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“…The undoped and F-doped (1,5,10,15, and 35 at.%) ZnO (1FZN, 5FZN, 10FZN, 15FZN, and 35FZN, resp.) rods were electrochemically deposited on p-Si from aqueous route using chronoamperometry method.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, among the transparent oxide semiconductors, zinc oxide (ZnO) based materials have been the focus of many researches. This is because these materials are suitably used in many areas of technology such as field effect transistors [1][2][3], homojunction or heterojunction diodes [4][5][6], sensors [7,8], antireflective coatings [9], and solar cells [10] because of the excellent superior optical properties and electrical performance. Furthermore, large substrates of ZnO are widely available, enabling homoepitaxial growth of ZnO devices, potentially crating a powerful competitor to the nitrides.…”

Section: Introductionmentioning

confidence: 99%

XPS Studies of Electrodeposited Grown F-Doped ZnO Rods and Electrical Properties of p-Si/n-FZN Heterojunctions

Ilıcan

Çağlar

Aksoy

et al. 2016

Journal of Nanomaterials

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The chemical composition of the electrodeposited undoped and F-doped ZnO (FZN) rods was investigated by X-ray photoelectron spectroscopy (XPS). These results confirmed the existence of F as a doping element into ZnO crystal lattice. The p-Si/n-ZnO and p-Si/n-FZN heterojunction diodes were fabricated and their electrical properties were investigated. Some parameters belong to these diodes such as ideality factor (n), barrier height ( ), and series resistance ( ) which were calculated from the current-voltage (I-V) curves that exhibited rectifying behavior by using thermionic emission theory, Norde's function, and Cheung's method. There is a good agreement between the diode parameters obtained from different methods.

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“…3c, d). From the UV-Visible spectrum, optical band gap can be calculated by the following equation [25]:…”

Section: Optical Characterization Of Tio 2 /Zno Hybrid Structuresmentioning

confidence: 99%

Self-assembled growth of tandem nanostructures based on TiO2 mesoporous/ZnO nanowire arrays and their optoelectronic and photoluminescence properties

Kılıç

Çelik

2015

Appl. Phys. A

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Growth of ZnO nanowires within TiO 2 mesoporous structures is carried out by hydrothermal method. Structural, optical and thermal characterizations have been carried out by SEM, XRD, EDAX, DTG, TG, PL and UVVis spectroscopy. XRD characterization shows that the all diffraction peaks of the tandem nanostructures films can be well indexed to a mixture of hexagonal wurtzite ZnO and anatase TiO 2 structures. The UV-Visible absorbance spectrum indicates that the tandem nanostructures based on TiO 2 mesoporous/ZnO nanowire arrays have 3.13 eV band gap energy while pure ZnO nanowire and bare TiO 2 mesoporous show 3.37 and 3.22 eV band gap energy, respectively. The PL spectra of tandem nanostructures show that the UV, violet and yellow emission peaks appeared at 3.1, 2.6 and 2.3 eV, respectively. It has been shown that from the PL spectra, the enhanced ultraviolet emission of TiO 2 /ZnO tandem structures is related to the fluorescence resonance energy transfer between TiO 2 mesoporous and ZnO nanowires. Thermogravimetric analysis from room temperature to 800°C has been performed to identify the thermal stability and the amount of tandem TiO 2 /ZnO structures.

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Construction of 3-dimensional ZnO-nanoflower structures for high quantum and photocurrent efficiency in dye sensitized solar cell

Cited by 53 publications

References 19 publications

Recent advances in photo-anode for dye-sensitized solar cells: a review

Recent advances in photo-anode for dye-sensitized solar cells: a review

XPS Studies of Electrodeposited Grown F-Doped ZnO Rods and Electrical Properties of p-Si/n-FZN Heterojunctions

Self-assembled growth of tandem nanostructures based on TiO2 mesoporous/ZnO nanowire arrays and their optoelectronic and photoluminescence properties

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