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Wanghua Chen
Researcher at École Polytechnique
Publications - 57
Citations - 1112
Wanghua Chen is an academic researcher from École Polytechnique. The author has contributed to research in topics: Nanowire & Silicon. The author has an hindex of 16, co-authored 55 publications receiving 973 citations. Previous affiliations of Wanghua Chen include Institut national des sciences appliquées de Rouen & Centre national de la recherche scientifique.
Papers
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Journal ArticleDOI
Gibbs-Thomson and diffusion-induced contributions to the growth rate of Si, InP, and GaAs nanowires
Vladimir G. Dubrovskii,N. V. Sibirev,G. E. Cirlin,I. P. Soshnikov,Wanghua Chen,Rodrigue Lardé,Emmanuel Cadel,Philippe Pareige,Tao Xu,Bruno Grandidier,J. P. Nys,Didier Stiévenard,M. Moewe,L.C. Chuang,Connie J. Chang-Hasnain +14 more
TL;DR: In this paper, a general model for the vapor-liquid-solid nanowire (NW) growth rates was presented, which accounts for adatom diffusion from the substrate and sidewalls into the Au catalyst drop as well as the Gibbs-Thomson effect of elevated chemical potential in the drop with a curved surface.
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Incorporation and redistribution of impurities into silicon nanowires during metal-particle-assisted growth
Wanghua Chen,Linwei Yu,Soumyadeep Misra,Zheng Fan,Philippe Pareige,Gilles Patriarche,Sophie Bouchoule,Pere Roca i Cabarrocas +7 more
TL;DR: It is found that the concentration of metal impurities in crystalline silicon nanowires increases with the growth rate and can reach a level of two orders of magnitude higher than that in their equilibrium solubility.
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Ultrathin Epitaxial Silicon Solar Cells with Inverted Nanopyramid Arrays for Efficient Light Trapping
Anne Gaucher,Andrea Cattoni,Christophe Dupuis,Wanghua Chen,Romain Cariou,Martin Foldyna,Loïc Lalouat,Emmanuel Drouard,Christian Seassal,Pere Roca i Cabarrocas,Stéphane Collin +10 more
TL;DR: This work reports on the fabrication of both planar and patterned ultrathin c-Si solar cells on glass using low temperature, low-cost, and scalable techniques and reveals that the low photon escape probability of 25% is the key factor in the light trapping mechanism.
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A review on plasma-assisted VLS synthesis of silicon nanowires and radial junction solar cells
TL;DR: In this paper, the authors focus on nanowires grown using the plasma-assisted vapour liquid solid method because of the simplicity and compatibility with current silicon thin-film technology, which has already resulted in ∼8% of stable devices with an absorber layer thickness of only 100nm.
Journal ArticleDOI
Photonic nanostructures for advanced light trapping in thin crystalline silicon solar cells
Christos Trompoukis,Islam Abdo,Romain Cariou,Ismael Cosme,Wanghua Chen,Olivier Deparis,Alexandre Dmitriev,Emmanuel Drouard,Martin Foldyna,Enric Garcia Caurel,Ivan Gordon,Babak Heidari,Aline Herman,Loïc Lalouat,Ki-Dong Lee,Jia Liu,Kristof Lodewijks,Fabien Mandorlo,Inès Massiot,Alexandre Mayer,Vladimir Mijkovic,Jérôme Muller,Regis Orobtchouk,G. Poulain,Patricia Prod'Homme,Pere Roca i Cabarrocas,Christian Seassal,Jef Poortmans,Robert Mertens,Ounsi El Daif,Valerie Depauw +30 more
TL;DR: In this article, the photonic nanostructures are fabricated by the combination of various lithography (nanoimprint, laser interference, and hole mask colloidal) and etching (dry plasma and wet chemical) techniques.