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Nestor Guijarro Carratala

Cette personne n’est plus à l’EPFL

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Publications associées (51)

Porous NiTiO3/TiO2 nanostructures for photocatatalytic hydrogen evolution

Kevin Sivula, Nestor Guijarro Carratala, Yongpeng Liu, Yong Zuo, Ting Zhang, Yu Zhang

We present a strategy to produce porous NiTiO3/TiO2 nanostructures with excellent photocatalytic activity toward hydrogen generation. In a first step, nickel-doped TiO2 needle bundles were synthesized by a hydrothermal procedure. Through the sintering in a ...

Royal Society of Chemistry2019

Solution-Processed Ultrathin SnS2-Pt Nanoplates for Photoelectrochemical Water Oxidation

Kevin Sivula, Xiaoyun Yu, Nestor Guijarro Carratala, Liang Yao, Yongpeng Liu, Yong Zuo, Ting Zhang

Tin disulfide (SnS2) is attracting significant interest because of the abundance of its elements and its excellent optoelectronic properties in part related to its layered structure. In this work, we specify the preparation of ultrathin SnS2 nanoplates (NP ...

AMER CHEMICAL SOC2019

Sensing the potential at the semiconductor-liquid interface: Route to uncover the electronic dynamics during photoelectrosynthetic reactions

Nestor Guijarro Carratala

AMER CHEMICAL SOC2019

Lead Halide Perovskite Quantum Dots to Enhance the Power Conversion Efficiency of Organic Solar Cells

Jun Ho Yum, Kevin Sivula, Florian Le Formal, Nestor Guijarro Carratala, Liang Yao, Barbara Alexandra Primera Darwich, Yongpeng Liu, Rebekah Anne Wells, Lucie Navratilova, Han-Hee Cho

The facile synthesis, solution-processability, and outstanding optoelectronic properties of emerging colloidal lead halide perovskite quantum dots (LHP QDs) makes them ideal candidates for scalable and inexpensive optoelectronic applications, including pho ...

Wiley-VCH Verlag GmbH2019

In situ and operando spectroelectrochemical techniques for evaluating interfacial carrier behavior in emerging photoelectrodes for solar fuel production

Kevin Sivula, Nestor Guijarro Carratala, Yongpeng Liu

AMER CHEMICAL SOC2019

Hematite Photoanodes for Solar Water Splitting: A Detailed Spectroelectrochemical Analysis on the pH-Dependent Performance

Florian Le Formal, Nestor Guijarro Carratala, Yongpeng Liu, Florent Alexandre Boudoire

The effect of the electrolyte pH on the performance of metal oxide photoanodes for solar water oxidation has not been fully resolved, and contrasting views have been presented in recent reports. Herein, a comprehensive set of spectroelectrochemical techniq ...

AMER CHEMICAL SOC2019

Defect Mitigation of Solution-Processed 2D WSe2 Nanoflakes for Solar-to-Hydrogen Conversion

Kevin Sivula, Xiaoyun Yu, Nestor Guijarro Carratala

Few-atomic-layer nanoflakes of liquid-phase exfoliated semiconducting transition metal dichalcogenides (TMDs) hold promise for large-area, high-performance, low-cost solar energy conversion, but their performance is limited by recombination at defect sites ...

American Chemical Society (ACS)2018

Organic Semiconductor Based Devices for Solar Water Splitting

Kevin Sivula, Muhammad Aiman Bin Rahmanudin Hamdan, Nestor Guijarro Carratala, Liang Yao

Solution processable organic semiconductors are well-established as high-performance materials for inexpensive and scalable solar energy conversion in organic photovoltaic (OPV) devices, but their promise in the economic conversion of solar energy into che ...

2018

Catalyst-Free, Fast, and Tunable Synthesis for Robust Covalent Polymer Network Semiconducting Thin Films

Kevin Sivula, Xavier Adrian Jeanbourquin, Xiaoyun Yu, Nestor Guijarro Carratala, Arvindh Sekar, Liang Yao

2018

Spinel Structural Disorder Influences Solar-Water-Splitting Performance of ZnFe2 O4 Nanorod Photoanodes

Kevin Sivula, Florian Le Formal, Nestor Guijarro Carratala, Yongpeng Liu, Rebekah Anne Wells, Xiaodi Zhu, Chen Gao

Wiley2018

Photocatalytic hydrogen generation from a visible-light responsive metal–organic framework system: the impact of nickel phosphide nanoparticles

László Forró, Andrzej Sienkiewicz, Kevin Sivula, Gloria Capano, Fatmah Ebrahim, Nestor Guijarro Carratala, Berend Smit, Kyriakos Stylianou, Daniele Ongari, Christopher Patrick Ireland, Bardiya Valizadeh, Stavroula Kampouri, Amber Kashan Mace, Ngoc Tú Nguyên

Royal Society of Chemistry2018

Evaluating spinel ferrites MFe2O4 (M = Cu, Mg, Zn) as photoanodes for solar water oxidation: prospects and limitations

Kevin Sivula, Florian Le Formal, Pauline Bornoz, Xavier Adrian Jeanbourquin, Xiaoyun Yu, Mathieu Steven Prévot, Nestor Guijarro Carratala

2018

Evaluating Charge Carrier Transport and Surface States in CuFeO

Kevin Sivula, Florian Le Formal, Xavier Adrian Jeanbourquin, Wiktor Stefan Bourée, Mathieu Steven Prévot, Nestor Guijarro Carratala

Interest in delafossite (CuFeO2) as a candidate p-type photocathode for photoelectrochemical (PEC) solar fuel production has recently been increasing, mainly due to its excellent stability in aqueous environments and favorable light absorption properties. ...

American Chemical Society2017

Engineering the self-assembly of diketopyrrolopyrrole-based molecular semiconductors via an aliphatic linker strategy

Kevin Sivula, Xavier Adrian Jeanbourquin, Andrea Gasperini, Xiaoyun Yu, Muhammad Aiman Bin Rahmanudin Hamdan, Nestor Guijarro Carratala, Emilie Aude Marie Ripaud

The solid-state self-assembly of molecular semiconductors is a key aspect for controlling the optoelectronic properties of organic electronic materials. Herein, we investigate the use of a flexible linker strategy to control the self-assembly of a solution ...

Royal Society of Chemistry2017

Hybrid Heterojunctions of Solution-Processed Semiconducting 2D Transition Metal Dichalcogenides

Kevin Sivula, Xavier Adrian Jeanbourquin, Natalie Renuka Banerji, Xiaoyun Yu, Muhammad Aiman Bin Rahmanudin Hamdan, Nestor Guijarro Carratala

Exfoliated transition metal dichalcogenides (2D-TMDs) are attractive light-harvesting materials for large-area and inexpensive solar energy conversion given their ability to form highly tolerant heterojunctions. However, the preparation of large-area heter ...

Amer Chemical Soc2017

Amorphous Ternary Charge-Cascade Molecules for Bulk Heterojunction Photovoltaics

Kevin Sivula, Xavier Adrian Jeanbourquin, Xiaoyun Yu, Muhammad Aiman Bin Rahmanudin Hamdan, Nestor Guijarro Carratala, Liang Yao

Ternary bulk heterojunctions with cascade-type energy-level configurations are of significant interest for further improving the power conversion efficiency (PCE) of organic solar cells. However, controlling the self-assembly in solution-processed ternary ...

Amer Chemical Soc2017

Semiconducting alternating multi-block copolymers via a di-functionalized macromonomer approach

Kevin Sivula, Xavier Adrian Jeanbourquin, Andrea Gasperini, Muhammad Aiman Bin Rahmanudin Hamdan, Nestor Guijarro Carratala, Liang Yao

The development of fully-conjugated semiconducting block-copolymers is an important goal for organic electronics, but to date has been almost exclusively limited to materials containing poly(3-alkylthiophenes). Here we present the prototype of a class of f ...

2017

CuInGaS2 photocathodes treated with SbX3 (X = Cl, I): the effect of the halide on solar water splitting performance

Kevin Sivula, Florian Le Formal, Pauline Bornoz, Xavier Adrian Jeanbourquin, Wiktor Stefan Bourée, Xiaoyun Yu, Mathieu Steven Prévot, Nestor Guijarro Carratala

The realization of photoelectrochemical tandem cells for efficient solar-to-hydrogen energy conversion is currently impeded by the lack of inexpensive, stable, and efficient photocathodes. The family of sulfide chalcopyrites (CuInxGa1-xS2) has recently dem ...

Iop Publishing Ltd2017

A Gibeon meteorite yields a high-performance water oxidation electrocatalyst

Paul Joseph Dyson, Arnaud Magrez, Kevin Sivula, Florian Le Formal, Wiktor Stefan Bourée, Charlotte Marie Sornay, Julie Voit, Aswin Gopakumar, Mathieu Steven Prévot, Nestor Guijarro Carratala

Examining the electrocatalytic performance of naturally-occurring metallic minerals is of interest for energy conversion applications given their unique atomic composition and formation history. Herein, we report the electrocatalytic function of an iron-ba ...

2016

A Bottom-Up Approach toward All-Solution-Processed High-Efficiency Cu(In,Ga)S

Kevin Sivula, Florian Le Formal, Pauline Bornoz, Xavier Adrian Jeanbourquin, Wiktor Stefan Bourée, Xiaoyun Yu, Mathieu Steven Prévot, Nestor Guijarro Carratala

The development of solution-processable routes to prepare efficient photoelectrodes for water splitting is highly desirable to reduce manufacturing costs. Recently, sulfide chalcopyrites (Cu(In,Ga)S-2) have attracted attention as photocathodes for hydrogen ...

Wiley-VCH Verlag Berlin2016

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