Publications related to Power optimizer

Stabilization of Highly Efficient and Stable Phase-Pure FAPbI(3)Perovskite Solar Cells by Molecularly Tailored 2D-Overlayers

Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Yuhang Liu, Ulf Anders Hagfeldt, Mohammad Ibrahim Dar, Hong Zhang, Jiahuan Zhang, Jiyoun Seo, Seckin Akin, Hongwei Zhu

As a result of their attractive optoelectronic properties, metal halide APbI(3)perovskites employing formamidinium (FA(+)) as the A cation are the focus of research. The superior chemical and thermal stability of FA(+)cations makes alpha-FAPbI(3)more suita ...

WILEY-V C H VERLAG GMBH2020

Retarding Thermal Degradation in Hybrid Perovskites by Ionic Liquid Additives

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Mounir Driss Mensi, Felix Daniel Bobbink, Cristina Roldán Carmona, Zhangjun Huang, Marius Franckevicius, Nikita Drigo, Rui Xia

Recent years have witnessed considerable progress in the development of solar cells based on lead halide perovskite materials. However, their intrinsic instability remains a limitation. In this context, the interplay between the thermal degradation and the ...

2019

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

Shaik Mohammed Zakeeruddin, David Lyndon Emsley, Jacques-Edouard Moser, Fabrizio Giordano, Jingshan Luo, Dominik Józef Kubicki, 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 ...

2019

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, Pankaj Kumar Yadav, Amita Ummadisingu, Silver Hamill Turren Cruz, Philippe Jürgen Holzhey

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

27.2 An Adiabatic Sense and Set Rectifier for Improved Maximum-Power-Point Tracking in Piezoelectric Harvesting with 541% Energy Extraction Gain

Kyojin Choo, Yimai Peng

Piezoelectric energy harvesters (PEHs) convert mechanical energy from vibrations into electrical energy. They have become popular in energy-autonomous IoT systems. However, the total energy extracted by a PEH is highly sensitive to matching between the PEH ...

IEEE2019

Optimized Electrolyte Loading and Active Film Thickness for Sandwich Polymer Light-Emitting Electrochemical Cells

Frank Nüesch, Roland Hany, Matthias Diethelm

Effects of ion concentration and active layer thickness play a critical role on the performance of light-emitting electrochemical cells. Expanding on a pioneering materials system comprising the super yellow (SY) polymer and the electrolyte trimethylolprop ...

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, Dongqin Bi, Norman Pellet, Xiong Li, Fei Zhang, Shilong Wang

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

High Temperature-Stable Perovskite Solar Cell Based on Low-Cost Carbon Nanotube Hole Contact

Michael Graetzel, Wolfgang Richard Tress, Ulf Anders Hagfeldt, Michael Saliba, Antonio Abate, Juan-Pablo Correa-Baena, Konrad Domanski

Mixed ion perovskite solar cells (PSC) are manufactured with a metal-free hole contact based on press-transferred single-walled carbon nanotube (SWCNT) film infiltrated with 2,2,7,-7-tetrakis(N, N-di-p-methoxyphenylamine)-9,90-spirobifluorene (Spiro-OMeTAD ...

Wiley-Blackwell2017

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

Shaik Mohammed Zakeeruddin, Michael Saliba, Pankaj Kumar Yadav, 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

Power optimizer

Stabilization of Highly Efficient and Stable Phase-Pure FAPbI(3)Perovskite Solar Cells by Molecularly Tailored 2D-Overlayers

Retarding Thermal Degradation in Hybrid Perovskites by Ionic Liquid Additives

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

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

27.2 An Adiabatic Sense and Set Rectifier for Improved Maximum-Power-Point Tracking in Piezoelectric Harvesting with 541% Energy Extraction Gain

Optimized Electrolyte Loading and Active Film Thickness for Sandwich Polymer Light-Emitting Electrochemical Cells

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

Real-Time Power-Reference Tracking Method for PV Converters

High Temperature-Stable Perovskite Solar Cell Based on Low-Cost Carbon Nanotube Hole Contact

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

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Real-Time Power-Reference Tracking Method for PV Converters

Optimized Electrolyte Loading and Active Film Thickness for Sandwich Polymer Light-Emitting Electrochemical Cells

Retarding Thermal Degradation in Hybrid Perovskites by Ionic Liquid Additives

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

27.2 An Adiabatic Sense and Set Rectifier for Improved Maximum-Power-Point Tracking in Piezoelectric Harvesting with 541% Energy Extraction Gain

Stabilization of Highly Efficient and Stable Phase-Pure FAPbI(3)Perovskite Solar Cells by Molecularly Tailored 2D-Overlayers

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

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

High Temperature-Stable Perovskite Solar Cell Based on Low-Cost Carbon Nanotube Hole Contact

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