Wei Chen

Cette personne n’est plus à l’EPFL

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Publications associées (23)

Nonempirical hybrid functionals for band gaps and polaronic distortions in solids

Alfredo Pasquarello, Wei Chen, Giacomo Francesco Leonardo Miceli, Igor Reshetnyak

2018

Diffusion engineering of ions and charge carriers for stable efficient perovskite solar cells

Michael Graetzel, Wei Chen, Yinghui Wu

Long-term stability is crucial for the future application of perovskite solar cells, a promising low-cost photovoltaic technology that has rapidly advanced in the recent years. Here, we designed a nanostructured carbon layer to suppress the diffusion of io ...

Nature Publishing Group2017

Accuracy of GW for calculating defect energy levels in solids

Alfredo Pasquarello, Wei Chen

The accuracy of GW in the determination of defect energy levels is assessed through calculations on a set of well-characterized point defects in semiconductors: the As antisite in GaAs, the substitutional Mg in GaN, the interstitial C in Si, the Si danglin ...

2017

Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition)

Françoise Gisou van der Goot Grunberg, Maurizio Molinari, Yi Sun, Chong Liu, Giuseppe Russo, Jian Wang, Peng Wang, Wei Chen, Darren Moore, Li Zhang

Taylor & Francis Inc2016

Ab initio Electronic Structure of Liquid Water

Alfredo Pasquarello, Wei Chen, Giacomo Francesco Leonardo Miceli, Francesco Ambrosio

Self-consistent GW calculations with efficient vertex corrections are employed to determine the electronic structure of liquid water. Nuclear quantum effects are taken into account through ab initio path-integral molecular dynamics simulations. We reveal a ...

American Physical Society2016

Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers

Michael Graetzel, Wei Chen, Weiwei Zhang, Yinghui Wu, Jian Liu

The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0 ...

American Association for the Advancement of Science2015

First-principles determination of defect energy levels through hybrid density functionals and GW

Alfredo Pasquarello, Wei Chen

In this topical review, we discuss recent progress in electronic-structure methods for calculating defect energy levels in semiconductors and insulators. We concentrate mainly on two advanced electronic-structure schemes, namely hybrid density functional t ...

Institute of Physics2015

Accurate band gaps of extended systems via efficient vertex corrections in GW

Alfredo Pasquarello, Wei Chen

We propose the use of an approximate bootstrap exchange-correlation kernel to account for vertex corrections in self-consistent GW calculations. We show that the approximate kernel gives accurate band gaps for a variety of extended systems, including simpl ...

2015

Band-edge positions in GW: Effects of starting point and self-consistency

Alfredo Pasquarello, Wei Chen

We study the effect of starting point and self-consistency within GW on the band-edge positions of semiconductors and insulators. Compared to calculations based on a semilocal starting point, the use of a hybrid-functional starting point shows a larger qua ...

2014

Band offsets of lattice-matched semiconductor heterojunctions through hybrid functionals and G(0)W(0)

Alfredo Pasquarello, Wei Chen, Karim Steiner

To assess the accuracy of hybrid functional and many-body GW methods, we study the band offsets for a set of lattice-matched semiconductor heterojunctions, including AlAs/GaAs(100), AlP/GaP(100), Si/GaP(110), Ge/GaAs(110), Ge/AlAs(110), Ge/ZnSe(110), and Z ...

2014

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