Structural and spectral properties of ZnO nanorods by wet chemical method for hybrid solar cells applications

Nouneh, Khalid; Ajjammouri, T.; Laghfour, Z.; Maaroufi, A.; Abd‐Lefdil, M.; Chaumont, Denis; Sekkat, Zouheir

doi:10.1016/j.matlet.2014.09.141

Cited by 15 publications

(8 citation statements)

References 24 publications

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“…The SPR curve is shifted by 2.5°due to changes in the propagation constant of the surface plasmon mode. The refractive index of ZnO:Al 2 % at 632.8 nm is much lower than the refractive index of pure ZnO (n = 1.95) and it is in correspondence with previously published data [17]. Therefore, small doping of ZnO by Al results in essential decrease in real part of refractive index (Fig.…”

Section: Optical Propertiessupporting

confidence: 91%

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Structural and opto-electrical properties of Al doped ZnO sputtered thin films

Laghfour

Ajjammouri

Aazou

et al. 2015

J Mater Sci: Mater Electron

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Transparent and conductive aluminum-doped zinc oxide (AZO) thin films with high preferential c-axis orientation have been deposited on glass substrates by radio frequency magnetron sputtering method of ZnO and DC magnetron sputtering of Al. Structural, surface morphology, optical and electrical properties of ZnO thin films were studied by X-ray diffraction, scanning electron microscope, ultraviolet-visible spectrophotometer, surface plasmon spectroscopy and Hall effect measurements. The results show that AZO films are polycrystalline and exhibit the hexagonal wurzite crystal structure with a preferred orientation along (002) direction. When DC sputtering power supplied to Al target increases, the crystallinity decreases while the electrical resistivity increases. The average measured transmittance exceeded 75 % in the visible range for all AZO thin films. The band gap values increase with decreasing the Al concentrations.

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Section: Optical Propertiessupporting

confidence: 91%

“…3. Therefore, the films, can be used as an ideal seed layer for different material structures such as ZnO nanorods [17].…”

Section: Structural Characterizationmentioning

confidence: 99%

Structural and opto-electrical properties of Al doped ZnO sputtered thin films

Laghfour

Ajjammouri

Aazou

et al. 2015

J Mater Sci: Mater Electron

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“…As shown in figure 2C, graphene material has two main peaks, G (1600cm ), which could derive in three cases a) if the G peak is less than the 2D intensity, the graphene is one layer thick, b) if the two peaks have the same intensity, the material obtained is bilayer graphene, and c) if the G is greater than the 2D, it corresponds to few layer graphene. (Li et al, 2009) Zinc oxide (ZnO) is an n-type semiconductor material with a wide functional single bandgap (3.37 eV) at room temperature (Nouneh et al, 2015), and an effective ultraviolet luminescence (Özgür et al, 2005). Quasi-one-dimensional structures (1D) as nanowires and nanorods, zinc oxide are promising materials for nanoelectronics (Park et al, 2005), and have great potential for applications in sensors and photovoltaic devices (Nouneh et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…(Li et al, 2009) Zinc oxide (ZnO) is an n-type semiconductor material with a wide functional single bandgap (3.37 eV) at room temperature (Nouneh et al, 2015), and an effective ultraviolet luminescence (Özgür et al, 2005). Quasi-one-dimensional structures (1D) as nanowires and nanorods, zinc oxide are promising materials for nanoelectronics (Park et al, 2005), and have great potential for applications in sensors and photovoltaic devices (Nouneh et al, 2015). The synthesis of graphene-ZnO hybrids and their applications in DSSC have been reviewed in our group previously (Badhulika et al 2015).…”

Section: Introductionmentioning

confidence: 99%

CVD growth of ZnO nanorods in situ on graphene and the study of its application as photoanode for solar cells

Madrigal-Monge¹,

Chaves-Villareal²

2017

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Se presenta la síntesis de un nanomaterial tridimensional híbrido formado por una plataforma de grafeno en donde se depositan in situ nanobarras de ZnO verticalmente alineadas (VAZNR). El procedimiento utilizado para el crecimiento de grafeno por deposición química de vapores (CVD) y la transferencia sobre vidrio resultó en una película de alta calidad, comprobado por diversos métodos de caracterización. Una capa delgada continua de VAZNR se depositó por CVD con alta cristalinidad y alineación vertical, según confirmamos por medio de difracción de rayos X (XRD) y microscopía electrónica de barrido (SEM). Se estudió la aplicación de este nanomaterial híbrido como el fotoánodo de una celda solar sensibilizada con tinte (DSSC). El fotoánodo mostró buena estabilidad mecánica en el entorno electrolítico corrosivo. Sin embargo, la buena conductividad eléctrica inicial de grafeno se perdió durante la deposición de ZnO, según determinamos por caracterización eléctrica y electroquímica de la DSSC. El grafeno sufre degradación térmica a 570˚C bajo concentraciones de oxígeno tan bajas como 0.4%v/v. Como resultado, la DSSC no mostró respuesta eléctrica cuando se expone a la iluminación. El material hibrido puede tener aplicación alternativa en dispositivos piezoelectricos, biomédicos, entre otros, donde el grafeno se utiliza como una plantilla de sacrificio flexible y coformacional en el proceso de fabricación.

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“…Hence, it is necessary to discover a simple and costimpact avenue for synthesis of ZnO nanoparticles. Compared with the above synthesis methods, co-precipitation method is relatively popular since it is easier, low-cost, environmentally friendly, enormous-scale production, low-temperature process and no catalyst is required [28][29][30]. The only disadvantage is that the materials prepared in aqueous solution are usually poor in terms of shape and size control.…”

Section: Introductionmentioning

confidence: 99%