Photoluminescence of thermal-annealed nanocolumnar ZnO thin films grown by electrodeposition

Marı́, B.; Manjón, F. J.; Mollar, M.; Cembrero, J.; Gómez, Roberto

doi:10.1016/j.apsusc.2005.04.024

Cited by 44 publications

(20 citation statements)

References 20 publications

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“…In the UV region the PL emission is due to excitons and reveals the presence of the free exciton (FE), two LOphonon replica and the bound exciton (BE). The features exhibited by the PL spectra indicate good crystal quality [10]. Dotted line follows the temperature evolution of the PL peak due to the free exciton which is the responsible of the room temperature PL signal.…”

Section: Resultsmentioning

confidence: 96%

Optical properties of zinc oxide‐based ternary compounds synthesized by electrodeposition

Marı́¹,

Cembrero

Mollar

et al. 2008

Phys. Status Solidi (c)

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Structure, morphology and optical properties of ZnO thin films grown by electrodeposition under different conditions changing both solvent (water or dimethylsulfoxide) and substrate (polycrystalline FTO or monocrystalline GaN) are reported. The results point out the advantage of using dimethylsulfoxide when uniform, oriented and highly transparent films are required. On the other hand electrodeposition in aqueous bath produces perfectly defined hexagonal ZnO columns which can be fully oriented by chosing a suitable substrate. Photoluminescence has only been observed for ZnO films grown in aqueous bath. Ternary compounds as ZnMO (M=Cd, Co, Mn) with a controlled ratio between both cations, and morphology and structure like binary ZnO can be easily obtained from dimethylsulfoxide. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Resultsmentioning

confidence: 96%

Optical properties of zinc oxide‐based ternary compounds synthesized by electrodeposition

Marı́¹,

Cembrero

Mollar

et al. 2008

Phys. Status Solidi (c)

Self Cite

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“…Different rates correspond to a mixture of the wurtzite structure with some collateral products, 13 or other crystalline structures 14,15 that are not suitable for optoelectronic applications. 16 It can be concluded also that the pulsed current electrodeposition allows a good control of the ZnO nucleation step, leading to a more pure wurtzite nanostructure.…”

Section: Results Analysismentioning

confidence: 99%

“…The dense morphology offers good optical properties. 14,[17][18][19] The reasons for this behavior lies on the nucleation step for ZnO nanostructures and its kinetics. As shown Pauporté and Lincot 11 the electrochemical reactions that compete in the nucleation stage are…”

Section: Results Analysismentioning

confidence: 99%

ZnO Nanoestructured Layers Processing with Morphology Control by Pulsed Electrodeposition

Tolosa¹,

Orozco-Messana²,

Damonte³

et al. 2011

J. Electrochem. Soc.

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The fabrication of nanostructured ZnO thin films is a critic process for a lot of applications of this semiconductor material. The final properties of this film depend fundamentally of the morphology of the sintered layer. In this paper a process is presented for the fabrication of ZnO nanostructured layers with morphology control by pulsed electrodeposition over ITO. Process optimization is achieved by pulsed electrodeposition and results are assessed after a careful characterization of both morphology and electrical properties. SEM is used for nucleation analysis on pulsed deposited samples. Optical properties like transmission spectra and Indirect Optical Band Gap are used to evaluate the quality of the obtained ZnO structures. Solar cell devices with industrial application are stratified laminar materials, with several dm 2 of exposed surface, processed by piling up several layers with different composition, each of them has a different function and complementary in the device. The performance of present commercial solar cells (that are based in semiconductors III-V, with Si poly or mono crystalline) is determined by the different fabrication process.1,2 In all of them, the production of diverse interfaces is the design factor, developed by growing different layers. The final properties of the semiconductor are defined by the type of boundary, the chemical species present, etc. . .. One of the determining factors in the final performance of the cell is its morphology, and the final product quality depends on the possibility of having a close control on the nucleation parameters.3,4 The optimization of these interfaces is a challenge for the photovoltaic industry, optimization must be based on a thorough understanding on the growth mechanisms. Likewise, the key for a successful implementation of photovoltaic energy is based on how industry attains a cheaper and more efficient process for cell fabrication. It is therefore necessary to reduce costs and production time of the cells without decreasing its performance. This requires more efficient production processes. These goals are common to all manufacturers of photovoltaic cells. Given the above scenario electrodeposition is selected as a favoured technique. This study develops the manufacture of inorganic layers of nanostructured ZnO for photovoltaic applications trough low-cost technology. In particular, Pulsed current electrodeposition (ED) is to be presented as a highly promising alternative. The aim of this study is to analyze the influence of waveform control for the electrodeposition current on the morphology as a tool to control the optical properties of the thin layer. The selected material (ZnO) has a mesoporous nanocrystalline structure optimal for the development of hybrid solar cells. These materials have been characterized using different techniques to quantify the ability of the photovoltaic material, and at the same time, to correlate morphology and optoelectronic properties. In particular, the optical, electrical and structural best suited fo...

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“…All measurements were performed in air at room temperature. There have been several reports on PL studies of the ZnO films [15][16][17][18]. The PL spectra shown in Fig.…”

Section: Optical Propertiesmentioning

confidence: 98%

Substrates effect on Zn1−xMnxO thin films grown by RF magnetron sputtering

Elanchezhiyan

Bhuvana

Gopalakrishnan

et al. 2008

Journal of Alloys and Compounds

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Photoluminescence of thermal-annealed nanocolumnar ZnO thin films grown by electrodeposition

Cited by 44 publications

References 20 publications

Optical properties of zinc oxide‐based ternary compounds synthesized by electrodeposition

Optical properties of zinc oxide‐based ternary compounds synthesized by electrodeposition

ZnO Nanoestructured Layers Processing with Morphology Control by Pulsed Electrodeposition

Substrates effect on Zn1−xMnxO thin films grown by RF magnetron sputtering

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