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Kevin Sivula

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Publications associées (165)

Influence of Composition on Performance in Metallic Iron-Nickel-Cobalt Ternary Anodes for Alkaline Water Electrolysis

Kevin Sivula, Nestor Guijarro Carratala, Andreas Züttel, Florent Alexandre Boudoire, Elizaveta Potapova Mensi

Metallic electrodes based on iron, nickel, and/or cobalt have re-emerged as promising cost-effective anodes for the alkaline oxygen evolution reaction (OER) due to their simplicity and their in situ formation of a highly active oxy-hydroxide surface cataly ...

AMER CHEMICAL SOC2020

Achieving visible light-driven hydrogen evolution at positive bias with a hybrid copper-iron oxide|TiO2-cobaloxime photocathode

Kevin Sivula, Florent Alexandre Boudoire

H-2 is an environmentally-friendly fuel that would allow for a circular economy but its sustainable production, e.g. from solar energy and water, remains a challenge. A hybrid CuFexOy|TiO2-CoHEC (CoHEC = chloro([4,4 '-bipyridine]-2,6-dicarboxylic acid)bis( ...

ROYAL SOC CHEMISTRY2020

Passivation Mechanism Exploiting Surface Dipoles Affords High-Performance Perovskite Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Thomas La Grange, Paul Joseph Dyson, Ulf Anders Hagfeldt, Jun Ho Yum, Kevin Sivula, Kazuteru Nonomura, Erfan Shirzadi, Fatemeh Ansari

The employment of 2D perovskites is a promising approach to tackling the stability and voltage issues inherent in perovskite solar cells. It remains unclear, however, whether other perovskites with different dimensionalities have the same effect on efficie ...

AMER CHEMICAL SOC2020

Cu2O photocathodes with band-tail states assisted hole transport for standalone solar water splitting

Michael Graetzel, Ulf Anders Hagfeldt, Kevin Sivula, Linfeng Pan, Liang Yao, Yuhang Liu, Dan Ren

Photoelectrochemical water splitting provides a promising solution for harvesting and storing solar energy. As the best-performing oxide photocathode, the Cu2O photocathode holds the performance rivaling that of many photovoltaic semiconductor-based photoc ...

Nature Research2020

Fully Conjugated Donor–Acceptor Block Copolymers for Organic Photovoltaics via Heck–Mizoroki Coupling

Kevin Sivula, Arvindh Sekar, Liang Yao, Yongpeng Liu, Charles Roger Jean Lhermitte, Han-Hee Cho

2019

Alternative Oxidation Reactions for Solar-Driven Fuel Production

Kevin Sivula, Charles Roger Jean Lhermitte

2019

Covalent polymer network semiconducting thin-films and method for producing thereof

Kevin Sivula, Liang Yao

A method for manufacturing a semiconducting, organic, covalent polymer network thin film is disclosed, said method comprising the steps of deposing a solution comprising azide- containing monomers and electron-deficient alkyne-containing monomers onto a re ...

2019

In Situ Electrochemical Oxidation of Cu2S into CuO Nanowires as a Durable and Efficient Electrocatalyst for Oxygen Evolution Reaction

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

Development of cost-effective oxygen evolution catalysts is of capital importance for the deployment of large-scale energy-storage systems based on metal-air batteries and reversible fuel cells. In this direction, a wide range of materials have been explor ...

AMER CHEMICAL SOC2019

Insights into the interfacial carrier behaviour of copper ferrite ( CuFe2O4) photoanodes for solar water oxidation

Kevin Sivula, Florian Le Formal, Nestor Guijarro Carratala, Liang Yao, Yongpeng Liu, Florent Alexandre Boudoire

Designing efficient yet robust photoanodes for water oxidation stands out as a major bottleneck in the realization of a feasible photoelectrochemical tandem cell for solar water splitting. Spinel copper ferrite (CuFe2O4) has been recently reported as a pot ...

Royal Society of Chemistry2019

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

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

Roll-to-Roll Deposition of Semiconducting 2D Nanoflake Films of Transition Metal Dichalcogenides for Optoelectronic Applications

Kevin Sivula, Rebekah Anne Wells, Charles Roger Jean Lhermitte, Hannah Elizabeth Johnson

Exfoliated transition metal dichalcogenide (TMD) nanomaterials possess remarkable and tunable semiconducting properties which make them competitive for use in ultrathin, flexible devices such as photodetectors, sensors, and photoelectrodes for solar energy ...

2019

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

Multiarm and Substituent Effects on Charge Transport of Organic Hole Transport Materials

Mohammad Khaja Nazeeruddin, Kevin Sivula, Antonio Prlj, Nikita Drigo, Liang Yao, Kun-Han Lin, Han-Hee Cho

We explore several potential dopant-free triphenylamine-based hole transport materials for perovskite solar cells by combining two design strategies: (1) incorporation of multiple arms for mobility enhancement and (2) including Lewis bases that assist in d ...

2019

Robust Electron Transport Layers via In Situ Cross-Linking of Perylene Diimide and Fullerene for Perovskite Solar Cells

Sylvain Nicolay, Jun Ho Yum, Soo-Jin Moon, Kevin Sivula, Liang Yao, Marina Caroline Michèle Caretti

While employing charge transport layers (CTLs) in optoelectronic devices including hybrid perovskite solar cells is essential for high performance, using solution-processed organic semiconductor-based CTLs poses challenges for device fabrication. Cross-lin ...

2019

Design and validation of a foldable and photovoltaic wide-field epiretinal prosthesis

Kevin Sivula, Naïg Aurelia Ludmilla Chenais, Samuel Charles Antoine Gilliéron, Marta Jole Ildelfonsa Airaghi Leccardi, Diego Ghezzi, Michele Bevilacqua, Paola Vagni, Laura Ferlauto

Retinal prostheses have been developed to fight blindness in people affected by outer retinal layer dystrophies. To date, few hundred patients have received a retinal implant. Inspired by intraocular lenses, we have designed a foldable and photovoltaic wid ...

Nature Research2018

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

Melt-processing of small molecule organic photovoltaics via bulk heterojunction compatibilization

Kevin Sivula, Xavier Adrian Jeanbourquin, Emilie Aude Marie Ripaud, Arvindh Sekar, Liang Yao, Yongpeng Liu

2018

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