Personne
Leo-Philipp Heiniger
Cette personne n’est plus à l’EPFL
Publications associées (10)
Nanocrystalline Rutile Electron Extraction Layer Enables Low-Temperature Solution Processed Perovskite Photovoltaics with 13.7% Efficiency
Michael Graetzel, Mohammad Khaja Nazeeruddin, Peng Gao, Aswani Yella, Leo-Philipp Heiniger
We demonstrate low-temperature (70 degrees C) solution processing of TiO2/CH3NH3PbI3 based solar cells, resulting in impressive power conversion efficiency (PCE) of 13.7%. Along with the high efficiency, a strikingly high open circuit potential (V-OC) of 1 ...
American Chemical Society2014Strong Photocurrent Amplification in Perovskite Solar Cells with a Porous TiO2 Blocking Layer under Reverse Bias
Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Fabrizio Giordano, Mohammad Ibrahim Dar, Thomas Moehl, Yonghui Lee, Konrad Domanski, Leo-Philipp Heiniger, Jeong-Hyeok Im
We investigate two different types of TiO2 blocking layer (BL) deposition techniques commonly used in solid-state methylammonium lead triiodide perovskite (MaPbI(3))-based solar cells. Although these BLs lead to similar photovoltaic device performance, the ...
Amer Chemical Soc2014Mesoporous TiO2 Beads Offer Improved Mass Transport for Cobalt-Based Redox Couples Leading to High Efficiency Dye-Sensitized Solar Cells
Michael Graetzel, Fabrizio Giordano, Thomas Moehl, Leo-Philipp Heiniger
Overcoming ionic diffusion limitations is essential for the development of high-efficiency dye-sensitized solar cells based on cobalt redox mediators. Here, improved mass transport is reported for photoanodes composed of mesoporous TiO2 beads of varying po ...
Wiley-VCH Verlag Berlin2014Diffusion and adsorption of dye molecules in mesoporous TiO2 photoelectrodes studied by indirect nanoplasmonic sensing
Michael Graetzel, Leo-Philipp Heiniger, Bengt Kasemo
In this study, we used Hidden Interface-Indirect Nanoplasmonic Sensing (HI-INPS) for real time monitoring of dye impregnation (adsorption-diffusion process) of mesoporous TiO2 electrodes of the kind used in dye-sensitized solar cells. We measured the dye p ...
Royal Society of Chemistry2013Low temperature crystalline titanium dioxide by atomic layer deposition for dye-sensitized solar cells
Michael Graetzel, Mohammad Khaja Nazeeruddin, Pascal Comte, Aswani Yella, Morgan Mertens Stefik, Aravind Kumar Chandiran, Leo-Philipp Heiniger
Low temperature processing of dye-sensitized solar cells (DSC) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates, however, this ...
Amer Chemical Soc2013See-Through Dye-Sensitized Solar Cells: Photonic Reflectors for Tandem and Building Integrated Photovoltaics
Michael Graetzel, Nicolas Tétreault, Leo-Philipp Heiniger, Yang Yang
See-through dye-sensitized solar cells with 1D photonic crystal Bragg reflector photoanodes show an increase in peak external quantum efficiency of 47% while still maintaining high fill factors, resulting in an almost 40% increase in power conversion effic ...
Wiley-Blackwell2013Time-Resolved Indirect Nanoplasmonic Sensing Spectroscopy of Dye Molecule Interactions with Dense and Mesoporous TiO2 Films
Michael Graetzel, Leo-Philipp Heiniger, Bengt Kasemo
Indirect nanoplasmonic sensing (INPS) is an experimental platform exploiting localized surface plasmon resonance (LSPR) detection of processes in nanomaterials, molecular assemblies, and films at the nanoscale. Here we have for the first time applied INPS ...
American Chemical Society2012Atomic Layer Deposition for Novel Dye-Sensitized Solar Cells
Michael Graetzel, Nicolas Tétreault, Morgan Mertens Stefik, Leo-Philipp Heiniger, Philippe Pierre Labouchère
Herein we present the latest fabrication and characterization techniques for atomic layer deposition of Al2O3, ZnO, SnO2, Nb2O5, HfO2, Ga2O3 and TiO2 for research on dye-sensitized solar cell. In particular, we review the fabrication of state-of-the-art 3D ...
Electrochemical Soc Inc, 65 S Main St, Pennington, Nj 08534-2839 Usa2011High-Efficiency Dye-Sensitized Solar Cell with Three-Dimensional Photoanode
Michael Graetzel, Shaik Mohammed Zakeeruddin, Nicolas Tétreault, Thomas Moehl, Jérémie Minh-Châu Brillet, Leo-Philipp Heiniger
Herein, we present a straightforward bottom-up synthesis of a high electron mobility and highly light scattering macroporous photoanode for dye-sensitized solar cells. The dense three-dimensional Al/ZnO, SnO2, or TiO2 host integrates a conformal passivatio ...
American Chemical Society2011Dye-Sensitized Solar Cells Employing a Single Film of Mesoporous TiO2 Beads Achieve Power Conversion Efficiencies Over 10%
Michael Graetzel, Pascal Comte, Leo-Philipp Heiniger
Dye-sensitized solar cells employing mesoporous TiO2 beads have demonstrated longer electron diffusion lengths and extended electron lifetimes over Degussa P25 titania electrodes due to the well interconnected, densely packed nanocrystalline TiO2 particles ...
American Chemical Society2010