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Michael Graetzel

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Publications associées (1 223)

Influence of the Adsorption of Phycocyanin on the Performance in DSS Cells: and Electrochemical and QCM Evaluation

Michael Graetzel, Jean-David Décoppet, Thomas Moehl

The influence of some coadsorbents and different pH values on the efficiency of DSS cells assembled with phycocyanin was evaluated using quartz crystal microbalance (QCM) and electrochemical techniques as impedance spectroscopy (EIS) and cyclic voltammetry ...

2016

Introducing rigid pi-conjugated peripheral substituents in phthalocyanines for DSSCs

Michael Graetzel, Mohammad Khaja Nazeeruddin

A new carboxy-Zn(II) phthalocyanine bearing rigid 2,6-diarylphenyl peripheral substituents linked to the macrocycle through alkynyl spacers has been prepared by a convergent approach, which implies a triple Sonogashira coupling between the formyltriiodoZnP ...

World Sci Publ Co Inc2016

A New Design Paradigm for Smart Windows: Photocurable Polymers for Quasi-Solid Photoelectrochromic Devices with Excellent Long-Term Stability under Real Outdoor Operating Conditions

Michael Graetzel

A new photoelectrochromic device (PECD) is presented in this work proposing the combination of a WO3-based electrochromic device (ECD) and a polymer-based dye-sensitized solar cell (DSSC). In the newly designed architecture, a photocurable polymeric membra ...

Wiley-Blackwell2016

High Absorption Coefficient Cyclopentadithiophene Donor-Free Dyes for Liquid and Solid-State Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Yelin Hu, Yiming Cao, Antonio Abate

We report a series of "donor-free" dyes featuring moieties of oligo(4,4-dihexyl-4H-cyclopenta[1,2-b:5,4-b']dithiophene) (CPDT) functionalized with cyanoacrylic end groups for mesoscopic titania solar cells based on I-/I-3(-) or Co(II)/Co(III) redox couple ...

Amer Chemical Soc2016

Copper Phenanthroline as a Fast and High-Performance Redox Mediator for Dye-Sensitized Solar Cells

Michael Graetzel, Ulf Anders Hagfeldt, Fabrizio Giordano, Marina Freitag, Yan Hao

The most commonly used redox mediators in dye-sensitized solar cells (DSCs), iodide/triiodide and cobalt trisbipyridine (Co(bpy)(3)), were successfully replaced by bis (2,9-dimethy1-1,10-phenanthroline) copp er (I/H) (Cu(dmp)(2)). The use ...

American Chemical Society2016

Lead-Free MA(2)CuCl(x)Br(4-x), Hybrid Perovskites

Michael Graetzel, Nripan Mathews, Shi Chen

Despite their extremely good performance in solar cells with efficiencies approaching 20% and the emerging application for light-emitting devices, organic-inorganic lead halide perovskites suffer from high content of toxic, polluting, and bioaccumulative P ...

American Chemical Society2016

Solar cell and process for producing the same

Michael Graetzel, Mohammad Khaja Nazeeruddin, Aswani Yella

The present invention relates to photoanodes, solar cells and methods and processes for producing the same. In some embodiments, the solar cells of the invention can do without a sintered nanoporous scaffold layer, making it possible to produce the solar c ...

2016

Vector Control in Developing Countries: Challenges and Solutions

Michael Graetzel, Paul Joseph Dyson, Claire Samantha Allardyce

Undoubtedly, reducing vector populations or their interactions with hosts below a critical level is a practical and proven method of disease control. Introduction of insecticide-treated bed nets has significantly reduced malaria in some parts of the world. ...

Schweizerische Chemische Gesellschaft2016

A Computational and Experimental Study of Thieno[3,4-b]thiophene as a Proaromatic pi-Bridge in Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Fabrizio Giordano

Four D-pi-A dyes (D=donor, A=accpetor) based on a 3,4-thienothiophene pi-bridge were synthesized for use in dye-sensitized solar cells (DSCs). The proaromatic building block 3,4-thienothiophene is incorporated to stabilize dye excited-state oxidation poten ...

Wiley-Blackwell2016

Enhanced Efficiency and Stability of Perovskite Solar Cells Through Nd-Doping of Mesostructured TiO2

Michael Graetzel, Henry Snaith, Antonio Abate

Block-copolymer templated chemical solution deposition is used to prepare mesoporous Nd-doped TiO2 electrodes for perovskite-based solar cells. X-ray diffraction and photothermal deflection spectroscopy show substitutional incorporation into the TiO2 cryst ...

Wiley-V C H Verlag Gmbh2016

A novel one-step synthesized and dopant-free hole transport material for efficient and stable perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Chenyi Yi, Xiong Li, Jingshan Luo, Dongqin Bi, Fei Zhang, Shilong Wang

A hole transport material ST1 was synthesized by a one-step Heck reaction. Compared to Spiro-OMeTAD, perovskite solar cells with ST1 exhibit a remarkable overall power conversion efficiency of 15.4% without the use of any dopants and additives, which is co ...

Royal Society of Chemistry2016

Towards optical optimization of planar monolithic perovskite/silicon-heterojunction tandem solar cells

Michael Graetzel, Ulf Anders Hagfeldt, Juan-Pablo Correa-Baena, Michael Saliba

Combining inorganic-organic perovskites and crystalline silicon into a monolithic tandem solar cell has recently attracted increased attention due to the high efficiency potential of this cell architecture. Promising results with published efficiencies abo ...

Iop Publishing Ltd2016

Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Fabrizio Giordano, Juan-Pablo Correa-Baena, Antonio Abate, Taisuke Matsui, Michael Saliba

Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current volta ...

Nature Publishing Group2016

Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Konrad Domanski, Wolfgang Richard Tress, Juan-Pablo Correa-Baena, Antonio Abate, Jiyoun Seo, Taisuke Matsui, Michael Saliba

Today's best perovskite solar cells use a mixture of formamidinium and methylammonium as the monovalent cations. With the addition of inorganic cesium, the resulting triple cation perovskite compositions are thermally more stable, contain less phase impuri ...

Royal Society of Chemistry2016

High Solar Flux Concentration Water Splitting with Hematite ( alpha-Fe2O3) Photoanodes

Michael Graetzel, Matthew Thomas Mayer

Wiley-VCH Verlag Berlin2016

Solution-Processed Tin-Based Perovskite for Near-Infrared Lasing

Michael Graetzel, Nripan Mathews

The family of solution-processed tin-based perovskites is demonstrated as a new and superior near-infrared gain medium. Due to the large electron-hole bimolecular recombination associated with tin and the reduced trap density with SnF2 treatment, these lea ...

Wiley-Blackwell2016

Hole-Transport Materials for Perovskite Solar Cells

Michael Graetzel, Laura Calio

The pressure to move towards renewable energy has inspired researchers to look for ideas in photovoltaics that may lead to a major breakthrough. Recently the use of perovskites as a light harvester has lead to stunning progress. The power conversion effici ...

Wiley-Blackwell2016

Functional hole transport materials for optoelectronic and/or electrochemical devices

Michael Graetzel, Mohammad Khaja Nazeeruddin, Michael Saliba

The present invention relates to a compound of formula (I) based on a structure comprising functionalized spirofluorene and fused aromatics or non-aromatic rings with at least one heteroatom, and used as hole transporting material in a optoelectronic and/o ...

2016

Synthesis and optoelectronic properties of chemically modified bi-fluorenylidenes

Michael Graetzel, Jacques-Edouard Moser, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Magdalena Anna Marszalek, Mateusz Barnaba Wielopolski

The development of new light harvesting materials is a key issue for the progress of the research on organic & hybrid photovoltaics. Here, we report a new class of organic sensitizers based on the bi-fluorenylidene moiety as p-linker within the donor–p-lin ...

Royal Society of Chemistry2016

Highly efficient and stable planar perovskite solar cells by solution-processed tin oxide

Michael Graetzel, Ulf Anders Hagfeldt, Ludmilla Steier, Konrad Domanski, Wolfgang Richard Tress, Juan-Pablo Correa-Baena, Antonio Abate, Taisuke Matsui, Michael Saliba, Elham Halvani Anaraki

Perovskite solar cells (PSCs) are one of the most promising lab-scale technologies to deliver inexpensive solar electricity. Low-temperature planar PSCs are particularly suited for large-scale manufacturing. Here, we propose a simple, solution-processed te ...

Royal Society of Chemistry2016

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