Publications by Paul Liska | EPFL Graph Search

Dye-sensitized solar cells for efficient power generation under ambient lighting

Paul Liska, Jacques-Edouard Moser, Shaik Mohammed Zakeeruddin, Joël Teuscher, Ulf Anders Hagfeldt, Fabrizio Giordano, Yasemin Saygili, Xiaoyu Zhang, Marina Freitag

Solar cells that operate efficiently under indoor lighting are of great practical interest as they can serve as electric power sources for portable electronics and devices for wireless sensor networks or the Internet of Things. Here, we demonstrate a dye-s ...

Nature Publishing Group2017

Low-temperature Fabrication of Highly-Efficient, Optically-Transparent (FTO-free) Graphene Cathode for Co-Mediated Dye-Sensitized Solar Cells with Acetonitrile-free Electrolyte Solution

Michael Graetzel, Paul Liska, Shaik Mohammed Zakeeruddin, Ladislav Kavan

Propionitrile electrolyte solutions mixed with sulfolane or with 1-ethyl 3-methyl imidazolium tetracyanoborate (ionic liquid) are optimized for Co(bpy)(3)(3+)/Co(bpy)(3)(2+)-tmediated DSCs working at low illumination intensity. Highly-active cathode cataly ...

Elsevier2016

Optically Transparent FTO-Free Cathode for Dye-Sensitized Solar Cells

Michael Graetzel, Paul Liska, Shaik Mohammed Zakeeruddin, Ladislav Kavan

The woven fabric containing electrochemically platinized tungsten wire is an affordable flexible cathode for liquid-junction dye-sensitized solar cells with the I-3(-)/I- redox mediator and electrolyte solution consisting of ionic liquids and propionitrile ...

Amer Chemical Soc2014

Voltage enhancement in dye-sensitized solar cell using (001)-oriented anatase TiO2 nanosheets

Michael Graetzel, Paul Liska, Jacques-Edouard Moser, Ladislav Kavan, Elham Ghadiri

A nanocrystalline TiO2 (anatase) nanosheet ex- posing mainly the (001) crystal faces was tested as photo- anode material in dye-sensitized solar cells. The nanosheets were prepared by hydrothermal growth in HF medium. Good-quality thin films were deposited ...

Springer2012

High-voltage (1.8 V) tandem solar cell system using a GaAs/AlXGa(1-X)As graded solar cell and dye-sensitised solar cells with organic dyes having different absorption spectra

Pascal Comte, Michael Graetzel, Paul Liska, Péter Kalman Péchy, Jun Ho Yum

Stacked multijunction (tandem) solar cells have been prepared by mechanically stacking dye-sensitised solar cells (DSCs) and a GaAs/AlXGa(1-X)As graded solar cell (GGC) as the top and bottom cells, respectively. Three organic dyes with different absorption ...

2011

Utilization of Direct and Diffuse Sunlight in a Dye-Sensitized Solar Cell - Silicon Photovoltaic Hybrid Concentrator System

Michael Graetzel, Paul Liska, Shaik Mohammed Zakeeruddin

The concept of a tandem hybrid concentrator solar module was demonstrated from a dye-sensitized TiO2 solar cell (DSSCs) and a silicon p-n junction solar cell. The test system employed DSSC and Si cells with indoor AM1.5G efficiencies of 9.1 and 18.1%, resp ...

2011

A round robin study of flexible large-area roll-to-roll processed polymer solar cell modules

Michael Graetzel, Paul Liska

A round robin for the performance of roll-to-roll coated flexible large-area polymer solar-cell modules involving 18 different laboratories in Northern America, Europe and Middle East is presented. The study involved the performance measurement of the devi ...

2009

Fabrication of thin film dye sensitized solar cells with solar to electric power conversion efficiency over 10%

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Carole Graetzel

Techniques of TiO2 film fabrication for dye-sensitized solar cells having a conversion efficiency of global air mass 1.5 (AM 1.5, 1000 W/m(2)) solar light to electric power over 10% are reported. Newly implemented fabrication technologies consist of pre-tr ...

2008

High-conversion-efficiency organic dye-sensitized solar cells with a novel indoline dye

Pascal Comte, Michael Graetzel, Paul Liska, Péter Kalman Péchy

An indoline dye (D205), the synthesis method of which is disclosed in this report, gave high-efficiency organic dye-sensitized solar cells (9.52%) using an anti-aggregation reagent (chenodeoxycholic acid). ...

Royal Society of Chemistry2008

Bifacial dye-sensitized solar cells based on an ionic liquid electrolyte

Pascal Comte, Michael Graetzel, Paul Liska, Shaik Mohammed Zakeeruddin

Solar energy is a promising solution to global energy-related problems because it is clean, inexhaustible and readily available. However, the deployment of conventional photovoltaic cells based on silicon is still limited by cost, so alternative, more cost ...

Nature Publishing Group2008

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

Fabrication of screen-printing pastes from TiO2 powders for dye-sensitised solar cells

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Péter Kalman Péchy, Peter Chen

2007

Nanocrystalline Dye-sensitized Solar Cells Having Maximum Performance

Michael Graetzel, Paul Liska, Ravindranathan Thampi, Shaik Mohammed Zakeeruddin

This paper presents an overview of the research carried out by a European consortium with the aim to develop and test new and improved ways to realise dye-sensitized solar cells (DSC) with enhanced efficiencies and stabilities. Several new areas have been ...

2007

The Electronic Role of the TiO2 Light-Scattering Layer in Dye-Sensitized Solar Cells

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Péter Kalman Péchy, Raphaël Charvet

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

New Trends in Dye Sensitized Solar Cell Research

Michael Graetzel, Paul Liska, Ravindranathan Thampi, Henry Snaith

2006

Photovoltaic Characterization of Dye-sensitized Solar Cells: Effect of Device Masking on Conversion Efficiency

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Marie Jirousek, Péter Kalman Péchy, Raphaël Charvet

2006

DFT-INDO/S modeling of new high molar extinction coefficient charge-transfer sensitizers for solar cell applications

Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Ulf Anders Hagfeldt

A new Ru(II) complex, Bu4N [ruthenium (4-carboxylic acid-4'-carboxylate-2,2'-bipyridine)(4,4'-di(2-(3,6-dimethoxyphenyl)ethenyl)-2,2'-bipyridine)(NCS)2] (N945H), was synthesized and characterized by anal., spectroscopic, and electrochem. techniques. The ab ...

2006

High-Efficiency Organic-Dye-Sensitized Solar Cells Controlled by Nanocrystalline-TiO2 Electrode Thickness

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Péter Kalman Péchy

Wiley2006

Highly Efficient dye-sensitized solar cells based on carbon black counter electrodes

Pascal Comte, Michael Graetzel, Paul Liska, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Péter Kalman Péchy, Takeru Bessho, Qian Wang

2006