Publications de Lioz Etgar | EPFL Graph Search

Investigation of Interfacial Charge Separation at PbS QDs/ (001) TiO2 Nanosheets Heterojunction Solar Cell

Michael Graetzel, Jacques-Edouard Moser, Lioz Etgar, Elham Ghadiri

In the recent years, the heterojunction solar cells based on quantum dots (QDs) have attracted attention due to strong light absorbing characteristics and the size effect on the bandgap tuning. This paper reports on the kinetics of interfacial charge separ ...

Wiley-Blackwell2015

A hybrid lead iodide perovskite and lead sulfide QD heterojunction solar cell to obtain a panchromatic response

Michael Graetzel, Mohammad Khaja Nazeeruddin, Peng Gao, Peng Qin, Lioz Etgar

We report for the first time on co-sensitization between CH3NH3PbI3 perovskite and PbS quantum dots (QDs) in a heterojunction solar cell to obtain a panchromatic response from the visible to near IR regions. Following the deposition of the sensitizers on a ...

Royal Society of Chemistry2014

Organo metal halide perovskite heterojunction solar cell and fabrication thereof

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar

The present invention provides a solid state heterojunction solar cell comprising a transparent conducting support layer (2,3), on which a nanostructured, surface-increasing scaffold structure is provided, wherein an organic-inorganic perovskite layer (4) ...

2014

Enhancing the open circuit voltage of dye sensitized solar cells by surface engineering of silica particles in a gel electrolyte

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Lioz Etgar, Guillaume Schuchardt

We prepared a quasi-solid electrolyte for dye-sensitized solar cells (DSSCs) that consist of ionic liquid and modified silica particles. Commercial bare silica F5 particles and modified silica F5 by NH2 and NH3+ groups were prepared, and fully characterize ...

Royal Society of Chemistry2013

Core/Shell PbSe/PbS QDs TiO2 Heterojunction Solar Cell

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar

Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facet ...

Wiley-Blackwell2013

Effect of Interfacial Engineering in Solid-State Nanostructured Sb2S3 Heterojunction Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Thomas Moehl, Lioz Etgar, Takafumi Fukumoto

Wiley-VCH Verlag Berlin2013

Light Energy Conversion by Mesoscopic PbS Quantum Dots/TiO2 Heterojunction Solar Cells

Michael Graetzel, Thomas Moehl, Lioz Etgar

Solid state PbS quantum dots (QDs)/TiO2 heterojunction solar cells were produced by depositing PbS QDs on a 500 nm thick mesoscopic TiO2 films using layer-by-layer deposition. Importantly, the PbS QDs act here as photosensitizers and at the same time as ho ...

American Chemical Society2012

Reducing recombination in ZnO photoanodes for dye sensitised solar cells through simple chemical synthesis

Michael Graetzel, Vincent Laporte, Lioz Etgar

A method has been developed to synthesise zinc oxide nanowire arrays that demonstrate superior device performance compared to conventional ZnO nanowires within dye sensitised solar cells (DSSCs). This simple yet effective methodology has produced nanowires ...

Royal Society of Chemistry2012

High Efficiency Quantum Dot Heterojunction Solar Cell Using Anatase (001) TiO2 Nanosheets

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar, Wei Zhang

Wiley2012

Enhancing the efficiency of a dye sensitized solar cell due to the energy transfer between CdSe quantum dots and a designed squaraine dye

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar, Guido Viscardi

The power conversion efficiency of a dye-sensitized solar cell with tailored squaraine dye enhanced by 47%, due to Forster resonance energy transfer from CdSe quantum dots to the squaraine dye. The incident photons to collection efficiency of electrons ind ...

2012