Electrodeposition of ZnO nanowires with controlled dimensions for photovoltaic applications: Role of buffer layer

Elias, Jamil; Tena‐Zaera, Ramón; Lévy‐Clément, C.

doi:10.1016/j.tsf.2007.04.027

Cited by 153 publications

(125 citation statements)

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“…Nanocrystalline ZnO exhibits variety of morphological structures like nanorods, nanowires, nanoribbon, nanoflower, nanowalls, quantum dots, nanopyramids, etc. [3][4][5][6][7][8]. It exhibits a prolific combination of multifunctional properties especially structural, thermal, semiconducting, optoelectronic, optical and piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Zargar

Arora

Hafiz

2015

Eur. Phys. J. Appl. Phys.

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Abstract. Nanosized ZnO particles derived from chemical co-precipitation route were used for casting ZnO films by screen printing method followed by sintering at two different temperatures. The variation in structural, optical and electrical properties of these films with temperature have been investigated by XRD, SEM, FTIR, Raman, UV-VIS, EPR and four probe analytical techniques. XRD patterns of these films exhibit polycrystalline nature with hexagonal wurtzite structure and SEM images reveal the smooth, dense and without any cracks/damage porous surface morphology. Infrared transmission spectra shows peaks pertaining to Zn-O stretching modes and their multiphonon modes. While Raman spectra exhibited strong peaks of E 2 (high) phonon and overtone of surface phonon mode at 429 cm −1 and 1144 cm −1 respectively with weak components of LO and TO branches. The direct band gap energy of these films showed narrowing of band gap from 3.21 eV to 3.12 eV on increasing sintering temperature from 500 • C to 600 • C. DC conductivity measurements confirmed semiconducting behaviour and showed lowering of activation energy. EPR spectra showed single narrow line resonance signal of g-value ∼ 1.9469 due to oxygen vacancies which are produced during synthesis of ZnO nanoparticles by sol-gel process. These studies revealed that on increasing sintering temperature the crystallinity of the film improves with reduction in lattice deformations in these screen printed ZnO films.

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Section: Introductionmentioning

confidence: 99%

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Zargar

Arora

Hafiz

2015

Eur. Phys. J. Appl. Phys.

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“…Our work in this area has spanned over several years, with focus on different types of materials pertinent to solar energy conversion. Thus, early work in II-VI films [33][34][35][36] led to studies of related compounds such as copper containing compounds such as CuSe, related compounds and their phase transitions [37], MoS 2 [38][39][40] and finally to development of new phases of semiconductors such as δ-SnS and Bi 2 S 3 [41,42] or new morphologies of zinc oxide including vertically aligned nanowires [43][44][45][46], nanotubes [47] and arrays of urchin-like by combining electrochemistry and sphere lithography [48].…”

Section: Electrochemical Deposition Of Thin Filmsmentioning

confidence: 99%

“…ZnO nanostructures with 1D and 3D morphologies are obtained using electrochemical deposition. Adjusting various deposition parameters enable the formation of arrays of vertically aligned ZnO nanowires with controlled dimensions, density and electrical properties [44][45][46]. The concentrations of zinc or chloride ions in the solution are found to be key parameters.…”

Section: Table 1: Lattice Parameters Of As-deposited (δ-Sns) and Aftementioning

confidence: 99%

(Research Award of the Energy and Technology Division) (Photo)Electrochemistry in the Service of Solar Energy Conversion

Lévy‐Clément

2011

ECS Trans.

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The paper is a short summary of the lecture delivered for the 2011 Research Award of the Energy Technology Division. The main expertise field of my group is materials science and (photo)electrochemistry for energy conversion and storage. The motivations that oriented my research are described, spanning from photoelectrochemistry of single crystal semiconductors, p-n photoelectroelectrochemical cells for solar hydrogen generation, to the photoetching of semiconductors, electrochemical processing of silicon surface including porous silicon, electrodeposition of polycrystalline semiconductor thin films and monocrystalline nanowires and development of Eta (extremely thin absorber) solar cells.

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Section: Introductionmentioning

confidence: 99%

“…Pradham and Leum 14 electrochemically obtained a series of ZnO nanostructures varying the precursor concentration in the electrolytic solution. For ZnO nanowires, is possible to control the diameter and length of these nanostructrures by changes in concentration precursor and synthesis time 15 .In current paper, highly oriented ZnO nanorods were prepared by electrodeposition from aqueous solutions containing Zn(CH 3 COO) 2 and O 2 as precursors employing CH 3 COONa as supporting electrolyte. Nanorods presenting a strong crystallographic orientation along the (0002) crystalline plane were assembled as-grown as photoanode in a CH 3 NH 3 PbI 3 perovskitebased solar cell.…”

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confidence: 99%

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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Electrodeposition of ZnO nanowires with controlled dimensions for photovoltaic applications: Role of buffer layer

Cited by 153 publications

References 13 publications

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

(Research Award of the Energy and Technology Division) (Photo)Electrochemistry in the Service of Solar Energy Conversion

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

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