Zinc‐oxide nanowires electrochemically grown onto sol–gel spin‐coated seed layers

Bojorge, Claudia Daniela; Kent, V. R.; Téliz, Erika; Cánepa, Horacio Ricardo; Henríquez, Rodrigo; Gómez, H.; Marotti, Ricardo E.; Dalchiele, Enrique A.

doi:10.1002/pssa.201026752

Cited by 36 publications

(51 citation statements)

References 52 publications

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“…The statistical analysis of the NR diameter is also shown in Figure 3; the mean diameter is 420 nm with a standard desviation of 130 nm. Comparing this values with the reported in previous studies 13 , our mean diameter is higher indicating that an increase in the deposition times lead to an increase in the diameter. Another noteworthy characteristic to highlight is the high nanorod density obtained (1.22*10 8 cm -2 ).…”

Section: Structural Morphological and Optical Characterization Of Znsupporting

confidence: 86%

“…Zinc oxide NR were electrochemically grown onto FTO covered glass following a previous reported methodology 13 . Briefly, the electrodeposition of ZnO NR arrays was performed in a three-electrode electrochemical cell with the FTO substrate as the working electrode, a Zn sheet as the counterelectrode, and a saturated calomel electrode (SCE) as the reference.…”

Section: Zno Electrochemical Depositionmentioning

confidence: 99%

“…Electrodeposition is a useful and simple technique to form ZnO nanostructures onto conducting substrates at lower temperatures and short deposition times 13 . Besides, it allows the modulation of the morphological and the structural characteristics of the deposits by simple changes in the synthesis conditions.…”

Section: Introductionmentioning

confidence: 99%

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ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

Cataño

Allende

Gómez

2015

J. Chil. Chem. Soc.

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We report a low-cost, free-hole conductor methylammonium lead iodide CH 3 NH 3 PbI 3 (perovskite)/ZnO nanorods (NR) heterojunction solar cell. ZnO nanorod arrays were obtained electrochemically onto transparent conducting oxide (fluor doped tin oxide, FTO) from an aqueous solution of zinc acetate. The ZnO NR were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and optical transmittance. Solar cell was fabricated forming the perovskite material onto the ZnO thin film. Spin coating of an equimolar mixture of CH 3 NH 3 I and PbI 2 in γ-butyrolactone solution (perovskite precursor solution) leads to CH 3 NH 3 PbI 3 formation on ZnO NR. A graphite-covered FTO/glass was used as a back contact. The photovoltaic performance of the solar cell was characterized at full sun intensity of 100 mW/cm 2 obtaining a shortcircuit current of 1.5 mA/cm 2 , an open circuit voltage of 0.47 V and energy conversion efficiency of 0.16 %.Keywords: Solar cells, Organic-Inorganic Perovskites, Zinc Oxide, Nanorods. INTRODUCTIONEnergy plays an important role in the economic future of countries. This problem is a global issue for our planet, aggravated by the fact that in the forthcoming decades, due to an increasing world population, energy demand will increase significantly. Conservative estimates implies that fossil fuels may be exhausted during the decade of 2040s 1 , with the serious consequences that this entails. It is expected that in future, solar energy will play a major role as an alternative energy source. The Sun provides Earth with as much energy every hour as human civilization uses every year 2 . Therefore, harvesting a small fraction of incident solar irradiation could meet our growing energy demand. Realizing the full potential of this vast energy source requires a new generation of photovoltaics that are both efficient and cost-effective.Nowadays, the cristallyne silicon solar cell corresponds to the most used photovoltaic technology. However, the manufacturing of this kind of solar cell demands a great amount of energy. Purifying and crystallizing the silicon are the most energy intensive parts of the solar cell manufacturing process. In this case the EPBT (Energy Payback Time, the length of time a PV system takes to generate the amount of energy put into system) is as long as 2.7 years.Organic-inorganic perovskite-based solar cells have recently emerged as a transformative photovoltaic (PV) technology. Perovskite solar cells based on titanium dioxide, a CH 3 NH 3 PbI 3 light-absorption layer and spiro-OMeTAD as hole transporting material have achieved power conversion efficiencies as high as 15.0 % 3 , making it competitive with thin-film PV technology. Several reports suggest that solar cells with efficiencies up to 20% are realistically achievable 4-5 . The most attractive aspects of this technology are the simplicity of photoactive layer synthesis and application using benchtop approaches at temperatures less than 100°C. 6 Besides, the perovskite material exhibit optimal characteri...

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Section: Structural Morphological and Optical Characterization Of Znsupporting

confidence: 86%

Section: Zno Electrochemical Depositionmentioning

confidence: 99%

See 1 more Smart Citation

ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

Cataño

Allende

Gómez

2015

J. Chil. Chem. Soc.

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“…for ZnO NW preparation [13]. The present study compares the morphology, microstructure, and optical properties of nanostructured ZnO TFs and ZnO NWs grown by this novel technique.…”

Section: Introductionmentioning

confidence: 99%

“…Recently we have developed a novel approach to growth of ZnO NWs by a two-step method that combines different techniques [13]. In the first step a seed layer of ZnO nucleation centers is prepared by a sol-gel method; in the second step, NWs are grown on the seed layer by electrochemical deposition.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on the properties of ZnO nanowires and nanocrystalline thin films

Broitman

Bojorge

Elhordoy³

et al. 2012

Surface and Coatings Technology

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The microstructural, morphological, optical and water-adsorption properties of nanocrystalline ZnO thin films and ZnO nanowires were studied and compared. The ZnO thin films were obtained by a sol–gel process, while the ZnO nanowires were electrochemically grown onto a ZnO sol–gel spin-coated seed layer. Thin films and nanowire samples were deposited onto crystalline quartz substrates covered by an Au electrode, able to be used in a quartz crystal microbalance. X-ray diffraction measurements reveal in both cases a typical diffraction pattern of ZnO wurtzite structure. Scanning electron microscopic images of nanowire samples show the presence of nanowires with hexagonal sections, with diameters ranging from 30 to 90 nm. Optical characterization reveals a bandgap energy of 3.29 eV for the nanowires and 3.35 eV for the thin films. A quartz crystal microbalance placed in a vacuum chamber was used to quantify the amount and kinetics of water adsorption onto the samples. Nanowire samples, which have higher surface areas than the thin films, adsorb significantly more water

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Efficiency Improvements in Solution‐Based CuInS₂ Solar Cells Incorporating a Cl‐Doped ZnO Nanopillars Array

Iorio

Berruet

Gau

et al. 2017

Physica Status Solidi (a)

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Solar cells are prepared combining ZnO as n‐type window In2S3 as buffer layer and CuInS2 as p‐type absorbing layer. Superstrate configuration is chosen so that all the materials could be prepared using inexpensive and eco‐friendly techniques, based on solution processed deposition methods and non‐toxic materials, avoiding vacuum high temperature Cd‐containing layers and KCN purification stages. Also, no further sulfurization treatment is involved in the preparation. To improve the collection efficiency, the cells are built using two different ZnO nanostructures (with and without Cl‐doping) and compared to the response of a cell prepared with just one dense ZnO layer. The photoresponse of the three different solar cells is analysed by J–V curves under illumination and intensity‐modulated photovoltage/photocurrent spectroscopy. A systematic characterization of the morphology and composition is carried out using X‐ray diffraction Raman confocal and electronic microscopy. The introduction of a nanostructured layer is not enough to produce a marked improvement in any of the electrical parameters. Instead, the presence of Cl‐doped nanopillars is shown to increase the efficiency of the solar cells up to a maximum value of 2.8%. A better series resistance together with a higher value for the charge collection efficiency contributes to explain the corresponding improvement in cell efficiency.

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Zinc‐oxide nanowires electrochemically grown onto sol–gel spin‐coated seed layers

Cited by 36 publications

References 52 publications

ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

Comparative study on the properties of ZnO nanowires and nanocrystalline thin films

Efficiency Improvements in Solution‐Based CuInS₂ Solar Cells Incorporating a Cl‐Doped ZnO Nanopillars Array

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Zinc‐oxide nanowires electrochemically grown onto sol–gel spin‐coated seed layers

Cited by 36 publications

References 52 publications

ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

ELECTRODEPOSITION OF ZnO NANOROD ARRAYS FOR APPLICATION IN PEROVSKITE BASED SOLAR CELLS

Comparative study on the properties of ZnO nanowires and nanocrystalline thin films

Efficiency Improvements in Solution‐Based CuInS2 Solar Cells Incorporating a Cl‐Doped ZnO Nanopillars Array

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Product

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Efficiency Improvements in Solution‐Based CuInS₂ Solar Cells Incorporating a Cl‐Doped ZnO Nanopillars Array