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Peng Wang

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Related publications (58)

Efficient and Stable Solid-State Dye-Sensitized Solar Cells Based on a High-Molar-Extinction-Coefficient Sensitizer

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

The high-molar-extinction-coefficient heteroleptic ruthenium aye, cis-Ru (4,4'-bis(5-octylthieno[3,2-b] thiophen-2-yl)-2,2'-bipyridine) (4,4'-dicarboxyl-2,2'-bipyridine) (NCS)(2), exhibits an AM 1.5 solar (100 mW cm(-2))-to-electric power-conversion effici ...

Wiley-Blackwell2010

Organic sensitizers

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peng Wang, Hao Qin

The present invention relates to new organic sensitizer compounds and to photoelectric conversion devices, in particular dye-sensitised solar cells comprising the new sensitizers. The present invention also relates to flexible photoelectric conversion devi ...

2010

High molecular extinction coefficient metal dyes

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peng Wang

The present invention relates to novel compounds that are useful as ligands in organometallic dyes. More particularly, the invention relates to dyes comprising the compounds, said dyes being sensitizing dyes useful in solar cell technology. According to an ...

2010

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

High-Efficiency Solid-State Dye-Sensitized Solar Cells: Fast Charge Extraction through Self-Assembled 3D Fibrous Network of Crystalline TiO2 Nanowires

László Forró, Michael Graetzel, Shaik Mohammed Zakeeruddin, Arnaud Magrez, Laurent Gabriel Félix Alexandre Stéphane Bungener, Jérémie Minh-Châu Brillet, Nicolas Tétreault, Rita Smajda, Endre Horvath, Thomas Moehl, Peng Wang

Herein, we present a novel morphology for solid-state dye-sensitized solar cells based on the simple and straightforward self-assembly of nanorods into a 3D fibrous network of fused single-crystalline anatase nanowires. This architecture offers a high roug ...

American Chemical Society2010

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

Employ a bisthienothiophene linker to construct an organic chromophore for efficient and stable dye-sensitized solar cells

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

We employed the bisthienothiophene conjugated linker along with a hydrophobic triphenylamine electron-donor and a hydrophilic cyanoacrylic acid electron-acceptor to construct a high molar extinction coefficient organic photosensitizer, exhibiting a power c ...

2009

Eutectic melts

Michael Graetzel, Shaik Mohammed Zakeeruddin, Yiming Cao, Peng Wang

The present invention refers to using the principal of a room temperature molten ionic liquid, to an electrolyte, to devices comprising the ionic liquid co-melting, and to the preparation of a room temperature ionic liquid via various physical and chemical ...

2009

Dye-sensitized solar cells with solvent-free ionic liquid electrolytes

Michael Graetzel, Shaik Mohammed Zakeeruddin, Yu Bai, Yiming Cao, Peng Wang

We systematically studied the temperature-dependent physicochemical properties, such as density, conductivity, and fluidity, of 1,3-dialkylimidazolium iodides. In combination with the amphiphilic Z907Na sensitizer, we have found that it is important to use ...

2008

Enhance the optical absorptivity of nanocrystalline TiO2 film with high molar extinction coefficient ruthenium sensitizers for high performance dye-sensitized solar cells

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

We report two new heteroleptic polypyridyl ruthenium complexes, coded C101 and C102, with high molar extinction coefficients by extending the pi-conjugation of spectator ligands, with a motivation to enhance the optical absorptivity of mesoporous titania f ...

2008

New Efficiency Records for Stable Dye-Sensitized Solar Cells with Low-Volatility and Ionic Liquid Electrolytes

Michael Graetzel, Shaik Mohammed Zakeeruddin, Nuttapol Pootrakulchote, Peng Wang, Jin Guo

We report a high molar extinction coefficient heteroleptic polypyridyl ruthenium sensitizer, featuring an electron-rich 3,4-ethylenedioxythiophene unit in its ancillary ligand. A nanocrystalline titania film stained with this sensitizer shows an improved o ...

2008

Tetrahydrothiophenium-based ionic liquids for high efficiency dye-sensitized solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mingkui Wang, Yiming Cao, Peng Wang

Binary melts of S-ethyltetrahydrothiophenium iodide and dicyanoamide (or tricyanomethide) have been employed for dye-sensitized solar cells with high power conversion efficiencies up to 6.9% under the illumination of AM 1.5G full sunlight. We have further ...

2008

Energy-Level and Molecular Engineering of Organic D-pi-A Sensitizers in Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Nuttapol Pootrakulchote, Peng Wang, Jin Guo

A series of organic D-pi-A sensitizers composed of different triarylamine donors in conjugation with the thienothiophene unit and cyanoacrylic acid as an acceptor has been synthesized at a moderate yield. Through tuning the number of methoxy substituents o ...

2008

An Organic Sensitizer with a Fused Dithienothiophene Unit for Efficient and Stable Dye-Sensitized Solar Cells

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

We report a high molar extinction coefficient organic sensitizer for high efficiency dye-sensitized solar cells. In combination with a solvent-free ionic liquid electrolyte, we have demonstrated a 7% cell showing an excellent stability measured under the t ...

2008

High-Performance Liquid and Solid Dye-Sensitized Solar Cells Based on a Novel Metal-Free Organic Sensitizer

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

A new metal-free organic sensitizer (see figure) for high-performance and applicable dye-sensitized solar cells is presented. In combination with a solvent-free ionic liquid electrolyte, a similar to 7% cell made with this sensitizer shows all excellent st ...

Wiley2008

New Organic Sensitizer for Stable Dye-Sensitized Solar Cells with Solvent-Free Ionic Liquid Electrolytes

Michael Graetzel, Shaik Mohammed Zakeeruddin, Nuttapol Pootrakulchote, Yiming Cao, Peng Wang

We report a high molar extinction coefficient metal-free sensitizer composed of a triarylamine donor in combination with the 2-(2,2'-bithiophen-5-yl)acrylonitrile conjugation unit and cyanoacrylic acid as an acceptor. In conjugation with a volatile acetoni ...

2008

Ionic liquid electrolyte

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peng Wang

The present invention relates to electrolytes comprising tetracyanoborate and an organic cation as components of electrolytes in electrochemical and/or optoelectronic devices, in particular solar cells. This ionic liquid has low viscosity and can be used a ...

2007

2,2 -Bipyridine ligand, sensitizing dye and dye sensitized solar cell

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peng Wang

A dye sensitized solar cell, comprising a heteroleptic polypyridil complex of Ru, Os or Fe. The donating ligand has an extended conjugated À-system increasing the light absorbance and keeing the LUMO energy level higher than that of the anchoring ligand. A ...

(Ecole Polytechnique Federale De Lausanne (EPFI), Switz.).2006

Dye sensitized solar cell

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peng Wang

A dye sensitized solar cell, wherein a compacting compound whose molecular structure comprises a terminal group, a hydrophobic part and an anchoring group is co-adsorbed together with the dye on the semi-conductive metal oxide layer of the photoanode, form ...

2005

Stable >=8% efficient nanocrystalline dye-sensitized solar cell based on an electrolyte of low volatility

Michael Graetzel, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Peng Wang

AIP American Institute of Physics2005

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