Publications de Norman Pellet | EPFL Graph Search

A Fully Printable Hole-Transporter-Free Semi-Transparent Perovskite Solar Cell

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Ibrahim Dar, Norman Pellet

Perovskite solar cells (PSCs) have gained tremendous attention owing to their promising photovoltaic performance, surpassing all the alternative technologies based on solution-processed materials. PSCs displaying record efficiencies contain hole transporti ...

WILEY-V C H VERLAG GMBH2021

Formation of Stable Mixed Guanidinium–Methylammonium Phases with Exceptionally Long Carrier Lifetimes for High-Efficiency Lead Iodide-Based Perovskite Photovoltaics

Shaik Mohammed Zakeeruddin, David Lyndon Emsley, Dominik Józef Kubicki, Dongqin Bi, Norman Pellet, Pankaj Kumar Yadav, Daniel Prochowicz, Albert Hofstetter

Methylammonium (MA)- and formamidinium (FA)-based organic-inorganic lead halide perovskites provide outstanding performance as photovoltaic materials, due to their versatility of fabrication and their power conversion efficiencies reaching over 22%. The pr ...

2018

Multifunctional molecular modulators for perovskite solar cells with over 20% efficiency and high operational stability

Shaik Mohammed Zakeeruddin, Dongqin Bi, David Lyndon Emsley, Jovana Milic, Jingshan Luo, Dominik Józef Kubicki, Norman Pellet, Xiong Li, Pierre Mettraux

Perovskite solar cells present one of the most prominent photovoltaic technologies, yet their stability, scalability, and engineering at the molecular level remain challenging. We demonstrate a concept of multifunctional molecular modulation of scalable an ...

Nature Research2018

Device and method for performing maximum power point tracking for photovoltaic devices in presence of hysteresis

Michael Graetzel, Shaik Mohammed Zakeeruddin, Fabrizio Giordano, Norman Pellet

A photovoltaic system including a solar cell having a hysteretic behavior; and a power device configured to extract a maximum power from the solar cell by forcing power oscillations of the power output by the solar cell. ...

2018

Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO2 Beads as Electron-Selective Contact

Shaik Mohammed Zakeeruddin, Jingshan Luo, Norman Pellet, Jiyoun Seo, Yasemin Saygili, Ryusuke Uchida

2018

The C6H6 NMR repository: An integral solution to control the flow of your data from the magnet to the public

Luc Patiny, Norman Pellet

2018

Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells

Shaik Mohammed Zakeeruddin, Kai Zhu, Dongqin Bi, Norman Pellet, Fei Zhang

2018

11% efficiency solid-state dye-sensitized solar cells with copper(II/I) hole transport materials

Shaik Mohammed Zakeeruddin, Jacques-Edouard Moser, Ulf Anders Hagfeldt, Jingshan Luo, Fabrizio Giordano, Joël Teuscher, Norman Pellet, Yiming Cao, Amita Ummadisingu, Yasemin Saygili

Solid-state dye-sensitized solar cells currently suffer from issues such as inadequate nanopore filling, low conductivity and crystallization of hole-transport materials infiltrated in the mesoscopic TiO2 scaffolds, leading to low performances. Here we rep ...

Nature Publishing Group2017

New Insight into the Formation of Hybrid Perovskite Nanowires via Structure Directing Adducts

Michael Graetzel, Shaik Mohammed Zakeeruddin, Norman Pellet, Jiyoun Seo, Andrey Petrov

We report a facile preparation approach of MAPbBr(3), MAPbCl(3), or FAPbBr(3) (where MA = CH3NH3+ and FA = CH(NH2)(2)(+)) perovskite nanowires via sequential synthesis of MAPbI(3) and FAPbI(3) nanowires with chemically controlled composition and morphologi ...

American Chemical Society2017

Perovskite solar cells with CuSCN hole extraction layers yield stabilized efficiencies greater than 20%

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Ibrahim Dar, Neha Arora, Norman Pellet

Perovskite solar cells (PSCs) with efficiencies greater than 20% have been realized only with expensive organic hole-transporting materials. We demonstrate PSCs that achieve stabilized efficiencies exceeding 20% with copper(I) thiocyanate (CuSCN) as the ho ...

American Association for the Advancement of Science2017