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4 results on '"Bonanno K"'

1. Surface Engineering of Nanostructured ZnO Surfaces.

Author

Laurenti, Marco, Stassi, Stefano, Canavese, Giancarlo, and Cauda, Valentina

Subjects
ZINC oxide, STRUCTURAL engineering, SOLAR cells, CHEMICAL detectors, CHEMICAL stability, QUANTUM dots, ORGANIC compounds
Abstract

Zinc Oxide (ZnO) nanostructures represent promising substrate materials for numerous applications, ranging from new generation solar cells, to bio- and chemical sensors. This interest is due to particular physical and chemical properties and highly active surface areas. Despite showing promising perspectives, the performances of ZnO nanomaterials are affected by several drawbacks, including a poor chemical stability against reaction solutions and intrinsic defects that are still preventing their integration into product applications. To overcome some of these limitations, different functionalization strategies have been introduced to engineer the ZnO surface properties. The synthetic methods used for surface functionalization are here discussed and analyzed with respect to the morphology of the agent to be anchored and to the functionalization approach. These approaches range from continuous coatings, to low-dimensional ligands like nanoparticles, photosensible dyes, quantum dots and organic compounds. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Investigation of New Approaches for InGaN Growth with High Indium Content for CPV Application.

Author

Arif, Muhammad, Sundaram, Suresh, Streque, Jérémy, Gmili, Youssef El, Puybaret, Renaud, Belahsene, Sofiane, Ramdane, Abderahim, Martinez, Anthony, Patriarche, Gilles, Fix, Thomas, Slaoui, Abdelillah, Voss, Paul L., Salvestrini, Jean Paul, and Ougazzaden, Abdallah

Subjects
INDIUM gallium nitride, SOLAR concentrators, PHOTOVOLTAIC power systems, SOLAR cells, SOLAR power plants
Abstract

We propose to use two new approaches that may overcome the issues of phase separation and high dislocation density in InGaN-based PIN solar cells. The first approach consists in the growth of a thick multi-layered InGaN/GaN absorber. The periodical insertion of the thin GaN interlayers should absorb the In excess and relieve compressive strain. The InGaN layers need to be thin enough to remain fully strained and without phase separation. The second approach consists in the growth of InGaN nano-structures for the achievement of high In content thick InGaN layers. It allows the elimination of the preexisting dislocations in the underlying template. It also allows strain relaxation of InGaN layers without any dislocations, leading to higher In incorporation and reduced piezo-electric effect. The two approaches lead to structural, morphological, and luminescence properties that are significantly improved when compared to those of thick InGaN layers. Corresponding full PIN structures have been realized by growing a p-type GaN layer on the top the half PIN structures. External quantum efficiency, electro-luminescence, and photo-current characterizations have been carried out on the different structures and reveal an enhancement of the performances of the InGaN PIN PV cells when the thick InGaN layer is replaced by either InGaN/GaN multi-layered or InGaN nanorod layer. [ABSTRACT FROM AUTHOR]

Published
2015
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3. Role of V-pits in the performance improvement of InGaN solar cells.

Author

Arif, Muhammad, Salvestrini, Jean-Paul, Streque, Jérémy, Jordan, Matthew B., El Gmili, Youssef, Sundaram, Suresh, Xin Li, Patriarche, Gilles, Voss, Paul L., and Ougazzaden, Abdallah

Subjects
INDIUM gallium nitride, SOLAR cells, BAND gaps, QUANTUM efficiency, CURRENT density (Electromagnetism)
Abstract

We study the influence of V-pits on the overall conversion efficiency of bulk In0.12Ga0.88N based heterojunction solar cells grown by MOVPE. We show that V-pits significantly enhances the extraction of the photogenerated carriers in the InGaN absorber, resulting in a peak external quantum efficiency of 79% and a short circuit current density (twice the state of the art) of 2.56 mA/cm-2 under AM 1.5G conditions. [ABSTRACT FROM AUTHOR]

Published
2016
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4. Materials for Solar Cell Technologies I

Author

Inamuddin and Inamuddin

Subjects
Solar cells, Photovoltaic cells--Materials
Abstract

The book reviews recent research and new trends in the area of solar cell materials. Topics include fabrication methods, solar cell design, energy efficiency and commercialization of next-generation materials. Special focus is placed on graphene and carbon nanomaterials, graphene in dye-sensitized solar cells, perovskite solar cells and organic photovoltaic cells, as well as on transparent conducting electrode (TCE) materials, hollow nanostructured photoelectrodes, monocrystalline silicon solar cells (MSSC) and BHJ organic solar cells. Also discussed is the use of graphene, sulfides, and metal nanoparticle-based absorber materials. Keywords: Solar Cell, Graphene Nanomaterials, Carbon Nanomaterials, Graphene in Dye-sensitized Solar Cells, Perovskite Solar Cells, Organic Photovoltaic Cells, Transparent Conducting Electrode (TCE) Materials, Hollow Nanostructured Photoelectrodes, Monocrystalline Silicon Solar Cells (MSSC), BHJ Organic Solar Cells, Electrochemical Sensing, Low Band-Gap Materials, Absorber Materials for Solar Cells.

Published
2021

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