Recherche

Afficher tous les résultats pour

Accueil

Personne

Filippo de Angelis

Cette personne n’est plus à l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (65)

Electronic and Optical Properties of the Spiro-MeOTAD Hole Conductor in Its Neutral and Oxidized Forms: A DFT/TDDFT Investigation

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis

The molecular structures and electronic and optical properties of 2,2'7,7'-tetrakis-(N,N-di-p-methoxyphenyl amine)-9,9'-spirobifluorene (spiro-MeOTAD) in different oxidation states have been investigated by means of DFT/TDDFT methods. Spiro-MeOTAD has been ...

American Chemical Society2011

Bis-Donor-Bis-Acceptor Tribranched Organic Sensitizers for Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Filippo de Angelis

A new class of tribranched dye-sensitized solar cell (DSC) sensitizers carrying two conjugated donors and two acceptor/anchoring groups is introduced. The approach leads to significantly different optical properties and enhanced stability with respect to r ...

Wiley-Blackwell2011

First-Principles Modeling of the Adsorption Geometry and Electronic Structure of Ru(II) Dyes on Extended TiO2 Substrates for Dye-Sensitized Solar Cell Applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis

We report a systematic density functional theory (DFT) computational investigation of Ru(II) sensitizer/TiO2 systems relevant to dye-sensitized solar cells (DSSCs). Focusing on the prototypical N719 and the recently introduced YE05 sensitizers, and conside ...

American Chemical Society2010

A Computational Investigation of Organic Dyes for Dye-Sensitized Solar Cells: Benchmark, Strategies, and Open Issues

Michael Graetzel, Filippo de Angelis

A comprehensive theoretical study on the electronic absorption spectra of a representative group of organic dyes (L0, D4, D5, C217, and JK2) employed in dye-sensitized solar cell devices is reported. A benchmark evaluation on different time-dependent densi ...

American Chemical Society2010

An inconvenient influence of iridium(III) isomer on OLED efficiency

Michael Graetzel, Mohammad Khaja Nazeeruddin, Davide Di Censo, Filippo de Angelis

The recently reported heteroleptic cyclometallated iridium(III) complex [Ir(2-phenylpyridine)(2)(2-carboxy-4-dimethylaminopyridine)] N984 and its isomer N984b have been studied more in detail. While photo- and electrochemical properties are very similar, D ...

Royal Society of Chemistry2010

High Open-Circuit Voltage Solid-State Dye-Sensitized Solar Cells with Organic Dye

Michael Graetzel, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Peter Chen, Jun Ho Yum, Soo-Jin Moon, Filippo de Angelis

Solid-state dye-sensitized solar cells were fabricated using an organic dye, 2-cyanoacrylic acid-4-(bis-dimethylfluoreneaniline)dithiophene (JK2), which exhibits more than 1 V open-circuit potential (V-oc). To scrutinize the origin of high voltage in these ...

American Chemical Society (ACS)2009

Time-dependent density functional theory study of squaraine dye-sensitized solar cells

Mohammad Khaja Nazeeruddin, Filippo de Angelis

We employ time-dependent density functional theory to study the optical properties of a squaraine sensitized TiO2 system, as a model for the corresponding dye-sensitized solar cell. The all-organic squaraine dye is particularly promising for light absorpti ...

Elsevier2009

White-light phosphorescence emission from a single molecule: application to OLED

Michael Graetzel, Kuppuswamy Kalyanasundaram, Mohammad Khaja Nazeeruddin, Filippo de Angelis

A simple mononuclear cyclometallated iridium(III) complex exhibits white photo- and electro-luminescence in the wavelength range from 440 to 800 nm, which originates from a single emitting excited state of mixed character. ...

Royal Society of Chemistry2009

Di-branched di-anchoring organic dyes for dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Xiaoyu Zhang, Filippo de Angelis

The first examples of di-branched di-anchoring organic sensitizers were synthesized and used in dye-sensitized solar cells leading to red-shifted IPCE maxima and increased photocurrent when compared to the corresponding mono-branched mono-anchoring dye, yi ...

2009

Panchromatic Cross-Substituted Squaraines for Dye-Sensitized Solar Cell Applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Filippo de Angelis

2009

Molecular Engineering of Organic Sensitizers for Dye-Sensitized Solar Cell Applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Ulf Anders Hagfeldt, Jun Ho Yum, Filippo de Angelis

Novel unsym. org. sensitizers comprising donor, electron-conducting and anchoring groups were engineered at a mol. level and synthesized for sensitization of mesoscopic TiO2 injection solar cells. The unsym. org. sensitizers 3-(5-(4-(diphenylamino)styryl)t ...

2008

Electron-rich heteroaromatic conjugated bipyridine based ruthenium sensitizer for efficient dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Filippo de Angelis

A novel heteroleptic ruthenium complex carrying a heteroaromatic-4,4'-pi-conjugated 2,2'-bipyridine [Ru(II)LL'(NCS)(2)] (L = 4,4'-bis[(E)-2-(3,4-ethylenedioxythien-2-yl)vinyl]-2,2'-bipyridine, L' = 4,4'-(dicarboxylic acid)-2,2'-bipyridine) was synthesized ...

Royal Society of Chemistry2008

Synthesis, Characterization, and DFT/TD-DFT Calculations of Highly Phosphorescent Blue Light-Emitting Anionic Iridium Complexes

Michael Graetzel, Kuppuswamy Kalyanasundaram, Mohammad Khaja Nazeeruddin, Davide Di Censo, Nicholas Evans, Filippo de Angelis

2008

Highly Efficient Solar Cells Using Organic Dyes with Amorphous Moiety

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Il Jung, Filippo de Angelis

Novel organic sensitizers comprising donor; electron-conducting, and anchoring groups were engineered at molecular level and synthesized. The functionalized unsymmetrical organic sensitizers 3-{5-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-thiophene-2-yl}-2 ...

MRS2007

Controlling Phosphorescence Color and Quantum Yields in Cationic Iridium Complexes: A Combined Experimental and Theoretical Study

Michael Graetzel, Kuppuswamy Kalyanasundaram, Jacques-Edouard Moser, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Nicholas Evans, Filippo de Angelis

2007

Efficient Far Red Sensitization of Nanocrystalline TiO2 Films by an Unsymmetrical Squaraine Dye

Michael Graetzel, Mohammad Khaja Nazeeruddin, Thomas Geiger, Jun Ho Yum, Filippo de Angelis

2007

Time-Dependent Density Functional Theory Investigations on the Excited States of Ru(II)-Dye-Sensitized TiO2 Nanoparticles: The Role of Sensitizer Protonation

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis

2007

Influence of the Sensitizer Adsorption Mode on the Open-Circuit Potential of Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis

American Chemical Society (ACS)2007

A High Molar Extinction Coefficient Charge Transfer Sensitizer and its Application in Dye Sensitized Solar Cell

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Takeru Bessho, Filippo de Angelis

2007

Synthesis, Characterization, and DFT-TDDFT Computational Study of a Ruthenium Complex Containing a Functionalized Tetradentate Ligand

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Guido Viscardi, Davide Di Censo, Filippo de Angelis

A ruthenium complex trans-[Ru(L)(NCS)2], L ) 4,4¢¢¢-di- tert-butyl-4¢,4¢¢-bis(carboxylic acid)-2,2¢:6¢,2¢¢:6¢¢,2¢¢¢- quaterpyridine (N886), was synthesized and characterized by spectroscopic and electrochemical methods. The absorption spectrum of the N886 ...

2006

Page 3 sur 4