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Shaik Mohammed Zakeeruddin

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Related publications (534)

Transport and Interfacial Transfer of Electrons in Dye-Sensitized Solar Cells Utilizing a Co(dbbip)(2) Redox Shuttle

Michael Graetzel, Shaik Mohammed Zakeeruddin

The transport and interfacial transfer of electrons in dye-sensitized solar cells utilizing the Co(dbbip)(2) (dbbip = 2,6-bis(l'-butylbenzimidazol-2'-yl)pyridine) redox couple as an alternative to the conventional I-3(-)/l(-) couple have been investigated ...

American Chemical Society2010

Enhanced Electron Collection Efficiency in Dye-Sensitized Solar Cells Based on Nanostructured TiO2 Hollow Fibers

Michael Graetzel, Jacques-Edouard Moser, Shaik Mohammed Zakeeruddin, Elham Ghadiri

Nanostructured TiO2 hollow fibers have been prepared using natural cellulose fibers as a template. This cheap and easily processed material was used to produce highly porous photoanodes incorporated in dye-sensitized solar cells and exhibited remarkably en ...

American Chemical Society2010

Sb2S3-Based Mesoscopic Solar Cell using an Organic Hole Conductor

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jun Ho Yum, Soo-Jin Moon

Solid-state nanocrystalline solar cells composed of chemical-bath-deposited Sb2S3 (antimony sulfide) as a light absorber layer deposited on nano-porous TiO2 and spiro-MeOTAD as an organic hole-transporting material yielded a solar conversion efficiency of ...

2010

Deposition of hole-transport materials in solid-state dye-sensitized solar cells by doctor-blading

Michael Graetzel, Shaik Mohammed Zakeeruddin

We report using doctor-blading to replace conventional spin coating for the deposition of the hole-transport material spiro-OMeTAD (2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene) in solid-state dye-sensitized solar cells. Doctor-bla ...

Elsevier2010

Enhanced-Light-Harvesting Amphiphilic Ruthenium Dye for Efficient Solid-State Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Carole Graetzel, Robin Humphry-Baker, Soo-Jin Moon, Mingkui Wang, Florian Le Formal, Peng Wang

A ruthenium sensitizer (coded C101, NaRu (4,4'-bis(5-hexylthiophen-2-yl)-2,2'-bipyridine) (4-carboxylic acid-4'-caboxylate-2,2'-bipyridine) (NCS)(2)) containing a hexylthiophene-conjugated bipyridyl group as an ancillary ligand is presented for use in soli ...

Wiley-Blackwell2010

Modified surface

Michael Graetzel, Shaik Mohammed Zakeeruddin, Péter Kalman Péchy

The present invention relates to modified surfaces. The surfaces comprise an inorganic material on which a phosphinic acid derivative is adsorbed. The phosphinic acid thus turns out to be a new anchoring group useful for surface derivatisation. The inventi ...

2010

Solvent-Free Ionic Liquid Electrolytes for Mesoscopic Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin

Ionic liquids have been identified as a new class of solvent that offers opportunities to move away from the traditional solvents. The physical-chemical properties of ionic liquids can be tuned and controlled by tailoring their structures. The typical prop ...

2009

A Dendritic Oligothiophene Ruthenium Sensitizer for Stable Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Amaresh Mishra

2009

Efficient CdSe Quantum Dot-Sensitized Solar Cells Prepared by an Improved Successive Ionic Layer Adsorption and Reaction Process

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Peter Chen, Mingkui Wang

In pursuit of efficient quantum dot (OD)-sensitized solar cells based on mesoporous TiO2 photoanodes, a new procedure for preparing selenide (Se2-) was developed and used for depositing CdSe QDs in situ over TiO2 mesopores by the successive ionic layer ads ...

2009

Polymer wiring of insulating electrode materials: An approach to improve energy density of lithium-ion batteries

Michael Graetzel, Shaik Mohammed Zakeeruddin, Péter Kalman Péchy, Qian Wang

The poor electronic conductivity of LiFePO4 has been one of the major issues impeding it from achieving high power and energy density lithium-ion batteries. In this communication, a novel polymer-wiring concept was proposed to improve the conduction of the ...

2009

The Influence of Charge Transport and Recombination on the Performance of Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Peter Chen, Mingkui Wang

Electrochemical impedance spectroscopy (EIS) and transient voltage decay measurements are applied to compare the performance of dye sensitized solar cells (DSCs) using organic electrolytes, ionic liquids and organic-hole conductors as hole transport materi ...

2009

Interface Modification of Dye-sensitized Solar Cells with Pivalic Acid to Enhance the Open-circuit Voltage

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jun Li, Xuan Li

Pivalic acid (PVA) was used as a new coadsorbent to dyesensitized solar cells (DSCs) to modify the interface between the TiO2 films and electrolyte. The addition of PVA improved the light-to-electricity conversion efficiency of devices by 8% by enhancing t ...

2009

Solid-state dye-sensitized solar cells using TiO2 nanotube arrays on FTO glass

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peter Chen, Jérémie Minh-Châu Brillet

Highly ordered, vertically oriented TiO2 nanotube arrays were prepared by potentiostatic anodization of titanium on FTO-coated glass substrate and for the first time successfully applied in the fabrication of solid-state dye sensitized solar cells (SSDSCs) ...

Royal Society of Chemistry2009

Influence of Iodide Concentration on the Efficiency and Stability of Dye-Sensitized Solar Cell Containing Non-Volatile Electrolyte

Michael Graetzel, Jacques-Edouard Moser, Shaik Mohammed Zakeeruddin

Dye-sensitized solar cells based on nanocrystalline TiO2 have been fabricated with an amphiphilic ruthenium sensitizer NaRu(4-carboxylic acid-4'-carboxylate) (4,4'-dinonyl-2,2'-bipyridine)(NCS)2, coded as Z-907Na, and a series of non-volatile 3-methoxyprop ...

Wiley-Blackwell2009

Tuning the Energy Level of Organic Sensitizers for High-Performance Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Sophie Wenger, Peng Wang

Cost-effective organic sensitizers will play a pivotal role in the future large-scale production and application of dye-sensitized solar cells. Here we report two new organic D-π-A dyes featuring electron-rich 3,4-ethylenedioxythiophene- and 2,2′-bis(3,4-e ...

2009

Highly Efficient Light-Harvesting Ruthenium Sensitizer for Thin-Film Dye- Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Carole Graetzel, Jean-David Décoppet, Mingkui Wang, Nuttapol Pootrakulchote, Jun Li

2009

Regenerative PbS and CdS Quantum Dot Sensitized Solar Cells with a Cobalt Complex as Hole Mediator

Pascal Comte, Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Peter Chen, Takeru Bessho, Soo-Jin Moon, Kevin Sivula

Metal sulfide (PbS and CdS) quantum dots (QDs) were prepared over mesoporous TiO2 films by improved successive ionic layer adsorption and reaction (SILAR) processes. The as-prepared QD-sensitized electrodes were combined with a cobalt complex redox couple ...

2009

Synthesis and Structure-Property Correlation in Shape-Controlled ZnO Nanoparticles Prepared by Chemical Vapor Synthesis and their Application in Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peter Chen

Here, the large scale synthesis of nanocrystalline ZnO spheres and tetrapods in the size range of 8-40 nm by chemical vapor synthesis using zinc metal as precursor is described. A detailed study of the effect of experimental parameters on the morphology an ...

2009

Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin

We report on the effect of substituting the two tetrabutyl ammonium counter ions of the standard N719 dye by sodium ions on the performance and stability of dye-sensitized solar cells (DSCs). The disodium analogue of N719 in conjunction with a non-volatile ...

2009

Electron Transport and Recombination in Solid-State Dye Solar Cell with Spiro-OMeTAD as Hole Conductor

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peter Chen, Mingkui Wang

2009

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