Publications de Mariateresa Scarongella

Assembly of -Cu2V2O7/WO3 heterostructured nanocomposites and the impact of their composition on structure and photoelectrochemical properties

Mariateresa Scarongella, Chethana Janardhana Gadiyar, Raffaella Buonsanti, Anna Loiudice, Michal Stanislaw Strach, Luca Rimoldi

Multinary metal oxides and their heterostructures play a key role as light absorbers in the production of solar chemicals. Synthetic tunability is crucial to understand the impact of composition and structure on the photoelectrochemical performance. Here, ...

Royal Society of Chemistry2018

Sizable Excitonic Effects Undermining the Photocatalytic Efficiency of beta-Cu2V2O7

Alfredo Pasquarello, Mariateresa Scarongella, Raffaella Buonsanti, Julia Anna Wiktor, Igor Reshetnyak, Michal Stanislaw Strach

Copper vanadates have been proposed as promising photoanodes for water-splitting photoelectrochemical cells, but their performance has recently been shown to be severely limited. To understand this behavior, we study the electronic structure and the optica ...

2018

The Fate of Electron–Hole Pairs in Polymer:Fullerene Blends for Organic Photovoltaics

Jacques-Edouard Moser, Natalie Stingelin, Jan Cornelius Brauer, Jelissa Risse, Mariateresa Scarongella, Natalie Renuka Banerji, Martina Causa'

There has been long-standing debate on how free charges are generated in donor:acceptor blends that are used in organic solar cells, and which are generally comprised of a complex phase morphology, where intermixed and neat phases of the donor and acceptor ...

Nature Publishing Group2016

Charge generation in organic solar cell materials studied by terahertz spectroscopy

Jan Cornelius Brauer, Mariateresa Scarongella, Natalie Renuka Banerji

We have investigated the photophysics in neat films of conjugated polymer PBDTTPD and its blend with PCBM using terahertz time-domain spectroscopy. This material has very high efficiency when used in organic solar cells. We were able to identify a THz sign ...

Spie-Int Soc Optical Engineering2015

A Close Look at Charge Generation in Polymer:Fullerene Blends with Microstructure Control

Jacques-Edouard Moser, Natalie Stingelin, Jelissa Risse, Mariateresa Scarongella, Natalie Renuka Banerji

We reveal some of the key mechanisms during charge generation in polymer:fullerene blends exploiting our well-defined understanding of the microstructures obtained in pBTTT:PCBM systems via processing with fatty acid methyl ester additives. Based on ultraf ...

Amer Chemical Soc2015

Charge carrier dynamics at organic interfaces for polymer photovoltaics

Mariateresa Scarongella

The increased energy demand and the importance to find renewable energy resources have been addressed by a scientific effort to improve the power conversion efficiency of organic solar cells. In particular, polymer-based solar cells have experienced a grea ...

EPFL2015

Importance of Unpaired Electrons in Organic Electronics

Mariateresa Scarongella, Natalie Renuka Banerji

The first observation that PBBTPD, a low bandgap, ambipolar conjugated donor-acceptor (DA) polymer based on benzobisthiadiazole (BBT), possesses an open-shell singlet ground state as well as a thermally accessible triplet state is described. Similarly, int ...

Wiley-Blackwell2015

The influence of microstructure on charge separation dynamics in organic bulk heterojunction materials for solar cell applications

Jacques-Edouard Moser, Natalie Stingelin, Arun Aby Paraecattil, Mariateresa Scarongella, Natalie Renuka Banerji

Light-induced charge formation is essential for the generation of photocurrent in organic solar cells. In order to gain a better understanding of this complex process, we have investigated the femtosecond dynamics of charge separation upon selective excita ...

Royal Society of Chemistry2014

Coupling of a high-energy excitation to superconducting quasiparticles in a cuprate from coherent charge fluctuation spectroscopy

Majed Chergui, Ahmad Odeh, Fabrizio Carbone, Andreas Helmut Christian Mann, Mariateresa Scarongella

Dynamical information on spin degrees of freedom of proteins or solids can be obtained by NMR and electron spin resonance. A technique with similar versatility for charge degrees of freedom and their ultrafast correlations could move the understanding of s ...

National Academy of Sciences2013

Charge transfer relaxation in donor–acceptor type conjugated materials

Ursula Röthlisberger, Andrey Laktionov, Mariateresa Scarongella, Natalie Renuka Banerji

The development of conjugated materials bearing electron-rich and electron-poor units along their backbone introduces new possibilities to control functionality for organic electronic applications through charge transfer character in ground and excited sta ...

Royal Society of Chemistry2013

Changes in the Silanol Protonation State Measured In Situ at the Silica-Aqueous Interface

Majed Chergui, Christopher Alexander Arrell, Mariateresa Scarongella

Recent nanomedical applications have again highlighted the significance of silica surface chemistry in solution. Here, we report in situ electronic structure measurements at the silica-aqueous interface as a function of pH for nanoparticles (NPs) of 7, 12, ...

2012