Publications de Peter Chen | EPFL Graph Search

Cooling dynamics of electrons in MAPbBr(3) probed in the deep-UV

Majed Chergui, Peter Chen, Thomas Charles Henry Rossi, Lijie Wang, Malte Oppermann, Yu-Hsien Chiang

Transient absorption in the Visible and in the deep-UV is performed on MAPbBr(3) thin films with 3.1 eV pump excitation. The UV probe can access higher order transitions in the material exploring different high-symmetry points of the Brillouin zone. Uncorr ...

E D P SCIENCES2019

Inorganic p-Type Semiconductors: Their Applications and Progress in Dye-Sensitized Solar Cells and Perovskite Solar Cells

Peter Chen, Jun Ho Yum, Soo-Jin Moon, Meng Li

Considering the increasing global demand for energy and the harmful ecological impact of conventional energy sources, it is obvious that development of clean and renewable energy is a necessity. Since the Sun is our only external energy source, harnessing ...

MDPI2016

Structure and Bonding of Isoleptic Coinage Metal (Cu, Ag, Au) Dimethylaminonitrenes in the Gas Phase

Oleg Boyarkine, Thomas Rizzo, Peter Chen, Natalia Nagornova

Dimethylaminonitrene complexes of IMesM+ (IMes = 1,3-bis(2,4,6-trimethylphenyl)- imidazol-2-ylidene; M = Cu, Ag, Au) were prepared in the gas phase and structurally characterized by high-resolution infrared spectroscopy of the cold species, ion-molecule re ...

American Chemical Society2010

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

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

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

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

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

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

Optical and electronic properties of dye-sensitized heterojunction solar cells

Peter Chen

This research studies the optical and electronics properties of Solid-State Dye-Sensitized Solar cells (SSDSCs). The propagation of light inside dye anchored TiO2 mesoporous layer includes scattering and absorption of photons. The light absorption behavior ...

EPFL2009

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

PbS and US Quantum Dot-Sensitized Solid-State Solar Cells: "Old Concepts, New Results"

Michael Graetzel, Mohammad Khaja Nazeeruddin, Frank Nüesch, Shaik Mohammed Zakeeruddin, Thomas Geiger, Peter Chen, Soo-Jin Moon

2009

The 2,2,6,6-Tetramethyl-1-piperidinyloxy Radical: An Efficient, Iodine-Free Redox Mediator for Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Peter Chen

2008

Application of Highly Ordered TiO2 Nanotube Arrays in Flexible Dye-Sensitized Solar Cells

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

2008

Recent Developments in Solid-State Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Peter Chen, Jun Ho Yum

2008

Charge collection and pore filling in solid-state dye-sensitized solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Robin Humphry-Baker, Ilkay Cesar, Peter Chen, Henry Snaith

The solar to electrical power conversion efficiency for dye-sensitized solar cells (DSCs) incorporating a solid-state organic hole-transporter can be over 5%. However, this is for devices significantly thinner than the optical depth of the active composite ...

2008

CdSe quantum dot-sensitized solar cells exceeding efficiency 1% at full-sun intensity

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Peter Chen, Jun Ho Yum

Colloidal cadmium selenide (CdSe) quantum dots QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO2 layer for QD-sensitized solar cells. The optimized QD-sensitized solar cells exhibited an unprecedented incident photo ...

2008

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