J
Julien Vidal
Researcher at Chimie ParisTech
Publications - 50
Citations - 2475
Julien Vidal is an academic researcher from Chimie ParisTech. The author has contributed to research in topics: Band gap & Direct and indirect band gaps. The author has an hindex of 22, co-authored 50 publications receiving 2090 citations. Previous affiliations of Julien Vidal include École Polytechnique & University of Illinois at Urbana–Champaign.
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Journal ArticleDOI
Band-structure, optical properties, and defect physics of the photovoltaic semiconductor SnS
Julien Vidal,Stephan Lany,Mayeul d'Avezac,Alex Zunger,Andriy Zakutayev,Jason Francis,Janet Tate +6 more
TL;DR: In this paper, the authors employ both theory and experiment to assess the PV relevant properties of SnS and clarify on whether SnS has an indirect or direct band gap and what is the minority carrier effective mass as a function of the film orientation.
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Density-based mixing parameter for hybrid functionals
Miguel A. L. Marques,Julien Vidal,Julien Vidal,Micael J. T. Oliveira,Lucia Reining,Silvana Botti,Silvana Botti +6 more
TL;DR: In this article, the authors proposed a method to calculate the mixing parameter from the electronic density alone, which is able to cut the error of traditional hybrid functionals for large and small gap materials, while retaining a good description of the structural properties.
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Defect Tolerant Semiconductors for Solar Energy Conversion
Andriy Zakutayev,Christopher M. Caskey,Christopher M. Caskey,Angela N. Fioretti,Angela N. Fioretti,David S. Ginley,Julien Vidal,Vladan Stevanović,Vladan Stevanović,Eric Tea,Stephan Lany +10 more
TL;DR: Theoretical calculations demonstrate that Cu3N with antibonding valence band maximum has shallow intrinsic defects and no surface states, in contrast to GaN with bonding valenceBand maximum, defining a class of defect-tolerant semiconductors for solar energy conversion applications.
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Strong interplay between structure and electronic properties in CuIn(S,Se){2}: a first-principles study.
Julien Vidal,Julien Vidal,Silvana Botti,Silvana Botti,Pär Olsson,Jean-François Guillemoles,Lucia Reining +6 more
TL;DR: A first-principles study of the electronic properties of CuIn(S,Se){2} (CIS) using state-of-the-art self-consistent GW and hybrid functionals to evaluate the quasiparticle gap and the valence band maximum.
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Impact of Minor Phases on the Performances of CZTSSe Thin-Film Solar Cells
Giovanni Altamura,Julien Vidal +1 more
TL;DR: In this article, the authors summarize what is known about CZTSSe minor phases and their impact on device characteristics, and summarize the impact of these phases on the performance of thin-film solar cells.