References of "Solar Energy Materials & Solar Cells"
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See detailOptical study of a solar concentrator for space applications based on a diffractive/refractive optical combination
Michel, Céline ULg; Loicq, Jerôme ULg; Languy, Fabian ULg et al

in Solar Energy Materials & Solar Cells (2014), 120PA

This paper presents a new design of a planar solar concentrator for space applications. The concentrator focuses light onto two spatially separated photovoltaic cells, allowing for independent control of ... [more ▼]

This paper presents a new design of a planar solar concentrator for space applications. The concentrator focuses light onto two spatially separated photovoltaic cells, allowing for independent control of the output power of each cell. Thanks to a blazed diffraction grating superimposed on a Fresnel lens, advantages of both spectral splitting and light focusing can be combined. The theoretical model of the optical design is presented, with the optimization of either element. Moreover, configuration improvement is proposed: a symmetrical configuration composed of two lenses. First numerical results are presented, highlighting the possibility to design a concentrator at about 10× for each cell, with an optical efficiency of about 75% and less than 10% of losses for tracking errors lower than ±0.9°. [less ▲]

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See detailImproved coloration contrast and electrochromic efficiency of tungsten oxide films thanks to a surfactant-assisted ultrasonic spray pyrolysis process
Denayer, Jessica ULg; Aubry, Philippe; Bister, Geoffroy et al

in Solar Energy Materials & Solar Cells (2014), 130

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See detailSilver nanowire networks: Physical properties and potential integration in solar cells
Langley, Daniel ULg; Giusti, Gael; Lagrange, Mélanie et al

in Solar Energy Materials & Solar Cells (2013)

With the growing interest in flexible electronics and the increased utilization of Indium Tin Oxide electrodes for display and photovoltaic applications the need for new materials is emerging. In this ... [more ▼]

With the growing interest in flexible electronics and the increased utilization of Indium Tin Oxide electrodes for display and photovoltaic applications the need for new materials is emerging. In this work we present the electro-optical properties of Ag nanowire networks as an alternative transparent conductive material. A comparison of different film deposition techniques is made and indicates that the properties of the network are independent of the fabrication method. Analysis of the electrical behavior as a function of nanowire density is made and compared with theoretical results as well as Monte Carlo simulations. Thermal annealing is shown to reduce the sheet resistance from 1000 Ω/sq to 8 Ω/sq; this reduction is achieved by local sintering of the nanowire junctions. Experimental optimization of Ag nanowire electrodes was undertaken and a peak in the electro-optical properties is observed at approximately 100 mg/m². Finally a discussion of the potential integration of Ag nanowire networks into solar cells is undertaken; we observe that these electrodes show promise as an emerging transparent conductive material, especially for flexible applications. [less ▲]

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See detailGrazing incidence X-ray reflectometry studies of CdTe(1 1 1) surfaces and a-Si thin films
Ijdiyaou, I.; Hafidi, K.; Azizan, M. et al

in Solar Energy Materials & Solar Cells (1998), 52

Chemically treated cadmium telluride (CdTe) surfaces and amorphous silicon (a-Si) thin films were characterized by X-ray reflectometry at grazing incidence. In the case of the surface of CdTe single ... [more ▼]

Chemically treated cadmium telluride (CdTe) surfaces and amorphous silicon (a-Si) thin films were characterized by X-ray reflectometry at grazing incidence. In the case of the surface of CdTe single crystal treated with an oxidizing agent (a solution of Br2 in CH3OH), the superficial layer was found to be less dense than its support with a profound alteration of CdTe in the volume. After rinsing in KOH solution, the properties of single-crystalline CdTe are obtained. In the case of a-Si thin layers, we show that the simulation of the reflectometry curves enables not only the determination of the layer thickness but also the detection of an ultrathin superficial oxide layer. [less ▲]

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