Concept

Power optimizer

Related publications (29)

Atomic-level passivation mechanism of ammonium salts enabling highly efficient perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, David Lyndon Emsley, Jacques-Edouard Moser, Jingshan Luo, Dominik Józef Kubicki, Fabrizio Giordano, Brennan James Walder, Andrés Burgos Caminal, Essa Awadh R Alharbi, Anwar Qasem M Alanazi, Alexander Roland Uhl

The high conversion efficiency has made metal halide perovskite solar cells a real break-through in thin film photovoltaic technology in recent years. Here, we introduce a straight-forward strategy to reduce the level of electronic defects present at the i ...

Nature Research2019

A chain is as strong as its weakest link - Stability study of MAPbI(3) under light and temperature

Michael Graetzel, Ulf Anders Hagfeldt, Michael Saliba, Amita Ummadisingu

The stability of perovskite solar cells is a key issue for industrial development. One reason for this is the volatile organic methylammonium (MA) cation, which is prone to degas under elevated temperatures from the perovskite. At the same time, small amou ...

2019

Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Chenyi Yi, Norman Pellet, Dongqin Bi, Xiong Li, Fei Zhang

A fullerene derivative (alpha-bis-PCBM) is purified from an as-produced bis-phenyl-C-61-butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and is employed as a templating agent for ...

Wiley-Blackwell2017

Real-Time Power-Reference Tracking Method for PV Converters

Mario Paolone, Lorenzo Enrique Reyes Chamorro

Due to the increasing presence of renewable inertia-less energy sources, power electronics interfaces are required to exploit their flexibility in order to support the overall grid quality of service. One way to achieve this, is that power converters are c ...

IEEE2017

Reduction in the Interfacial Trap Density of Mechanochemically Synthesized MAPbI(3)

Michael Graetzel, Shaik Mohammed Zakeeruddin, Michael Saliba, Daniel Prochowicz

Organo-lead halide perovskites have emerged as promising light harvesting materials for solar cells. The ability to prepare high quality films with a low concentration of defects is essential for obtaining high device performance. Here, we advance the proc ...

Amer Chemical Soc2017

Over 20% PCE perovskite solar cells with superior stability achieved by novel and low-cost hole-transporting materials

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Chenyi Yi, Xiong Li, Norman Pellet, Dongqin Bi, Fei Zhang, Hongwei Zhu

The exploration of alternative low-cost molecular hole-transporting materials (HTMs) for both highly efficient and stable perovskite solar cells (PSCs) is a relatively new research area. Two novel HTMs using the thiophene core were designed and synthesized ...

Elsevier Science Bv2017

Hill climbing hysteresis of perovskite-based solar cells: a maximum power point tracking investigation

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Ibrahim Dar, Fabrizio Giordano, Norman Pellet, Joachim Maier

The surge of the power conversion efficiency of metal halide lead perovskite solar cells comes with concerns, such as the long-term ecotoxicity of lead compounds, their sensitivity toward moisture and oxygen, or the scarcity of some of their components. Mo ...

Wiley-Blackwell2017

A Model-Based Filtering Strategy to Reconstruct the Maximum Power Generation of Curtailed Photovoltaic Installations: application to forecasting

Mario Paolone, Fabrizio Sossan, Enrica Scolari

In this paper, we propose a model-based filtering strategy to reconstruct the maximum power production of a PV power plant thanks to integrating measurements of the PV cell temperature, system DC voltage and DC current. The filter relies on a reversed phys ...

IEEE2017

Improved Optics in Monolithic Perovskite/Silicon Tandem Solar Cells with a Nanocrystalline Silicon Recombination Junction

Christophe Ballif, Matthieu Despeisse, Aïcha Hessler-Wyser, Stefaan De Wolf, Sylvain Nicolay, Quentin Thomas Jeangros, Björn Niesen, Loris Barraud, Jérémie Werner, Bertrand Yves Paul Paviet-Salomon, Johannes Peter Seif, Florent Sahli, Raphaël Monnard, Matthias Wolfgang Bräuninger, Andrea Tomasi

Perovskite/silicon tandem solar cells are increasingly recognized as promi-sing candidates for next-generation photovoltaics with performance beyond the single-junction limit at potentially low production costs. Current designs for monolithic tandems rely ...

2017