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Michael Graetzel

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Publications associées (1 223)

Bifunctional hole-shuttle molecule for improved interfacial energy level alignment and defect passivation in perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jun Ho Yum, Kevin Sivula, Dan Ren, Jing Gao, Meng Xia, Felix Thomas Eickemeyer, Zhongjin Shen

Interface engineering in perovskite solar cells is key to high performance. Now, You et al. design an interlayer that both passivates defects and improves the energy level alignment between the perovskite and hole transport material. ...

NATURE PORTFOLIO2023

A Molecularly Tailored Photosensitizer with an Efficiency of 13.2% for Dye-Sensitized Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Zhongjin Shen, Naura Fakhira Antariksa

Photosensitizers yielding superior photocurrents are crucial for copper-electrolyte-based highly efficient dye-sensitized solar cells (DSCs). Herein, two molecularly tailored organic sensitizers are presented, coded ZS4 and ZS5, through judiciously employi ...

Wiley-V C H Verlag Gmbh2023

Double Layer Composite Electrode Strategy for Efficient Perovskite Solar Cells with Excellent Reverse-Bias Stability

Michael Graetzel

Perovskite solar cells (PSCs) have become the representatives of next generation of photovoltaics; nevertheless, their stability is insufficient for large scale deployment, particularly the reverse bias stability. Here, we propose a transparent conducting ...

2023

Electrochemical synthesis of propylene from carbon dioxide on copper nanocrystals

Michael Graetzel, Shaik Mohammed Zakeeruddin, Oliver Kröcher, Alimohammad Bahmanpour, Dan Ren, Jing Gao

The conversion of carbon dioxide to value-added products using renewable electricity would potentially help to address current climate concerns. The electrochemical reduction of carbon dioxide to propylene, a critical feedstock, requires multiple C-C coupl ...

NATURE PORTFOLIO2023

Investigation of nickel iron layered double hydroxide for water oxidation in different pH electrolytes

Michael Graetzel, Lichen Bai, Dan Ren

Nickel iron layered double hydroxide (NiFe LDH) is one of the best oxygen evolution reaction (OER) catalysts in alkaline electrolytes. However, it performs poorly in neutral electrolytes, and the detailed mechanism is still unclear. Herein, we introduce el ...

ELSEVIER2023

Suppressed phase segregation for triple-junction perovskite solar cells

Michael Graetzel, Mingyang Wei

The tunable bandgaps and facile fabrication of perovskites make them attractive for multi-junction photovoltaics(1,2). However, light-induced phase segregation limits their efficiency and stability(3-5): this occurs in wide-bandgap (>1.65 electron volts) i ...

NATURE PORTFOLIO2023

2D/3D heterojunction engineering at the buried interface towards high-performance inverted methylammonium-free perovskite solar cells

Michael Graetzel

To prevent charge losses and degradation at the buried interface of inverted methylammonium-free perovskite solar cells, Li et al. form a 2D/3D perovskite structure using 2-aminoindan hydrochloride as an additive. ...

NATURE PORTFOLIO2023

Cooperative passivation of perovskite solar cells by alkyldimethylammonium halide amphiphiles

Michael Graetzel, Shaik Mohammed Zakeeruddin, Ursula Röthlisberger, Ulf Anders Hagfeldt, Thomas Paul Baumeler, David Lyndon Emsley, Essa Awadh R Alharbi, Mathias Dankl, Aditya Mishra, Felix Thomas Eickemeyer, Michael Allan Hope, Anurag Krishna, Olivier Ouellette, Lukas Pfeifer, Nikolaos Lempesis, Georgios Kakavelakis

2023

Buried Interface Engineering Enables Efficient and 1,960-hour Isos-L-2i Stable Inverted Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Ursula Röthlisberger, Xiong Li, Mathias Dankl, Felix Thomas Eickemeyer, Nikolaos Lempesis, Mingyang Wei, Virginia Carnevali, Lorenzo Agosta, Lin Li

High-performance perovskite solar cells (PSCs) typically require interfacial passivation, yet this is challenging for the buried interface, owing to the dissolution of passivation agents during the deposition of perovskites. Here, we overcome this limitati ...

Zenodo2023

A Complete Picture of Cation Dynamics in Hybrid Perovskite Materials from Solid-State NMR Spectroscopy

Michael Graetzel, David Lyndon Emsley, Aditya Mishra, Michael Allan Hope

The organic cations in hybrid organic-inorganic perovskites rotate rapidly inside the cuboctahedral cavities formed by the inorganic lattice, influencing optoelectronic properties. Here, we provide a complete quantitative picture of cation dynamics for for ...

AMER CHEMICAL SOC2023

Stabilization of FAPbI(3) with Multifunctional Alkali-Functionalized Polymer

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jing Gao, Masaud Hassan S Almalki, Felix Thomas Eickemeyer, Hong Zhang, Anurag Krishna

The defects located at the interfaces and grain boundaries (GBs) of perovskite films are detrimental to the photovoltaic performance and stability of perovskite solar cells. Manipulating the perovskite crystallization process and tailoring the interfaces w ...

Wiley-V C H Verlag Gmbh2023

Understanding and decoupling the role of wavelength and defects in light-induced degradation of metal-halide perovskites

Michael Graetzel, Ulf Anders Hagfeldt, Anurag Krishna

Light-induced degradation in metal halide perovskites is a major concern that can potentially hamper the commercialization of perovskite optoelectronic devices. The phenomena viz. ion migration, phase segregation, and defect intolerance are believed to be ...

Royal Soc Chemistry2023

Unveiling facet-dependent degradation and facet engineering for stable perovskite solar cells

Michael Graetzel, Felix Thomas Eickemeyer

A myriad of studies and strategies have already been devoted to improving the stability of perovskite films; however, the role of the different perovskite crystal facets in stability is still unknown. Here, we reveal the underlying mechanisms of facet-depe ...

American Association for the Advancement of Science2023

Optoelectronic or photovoltaic device with metal halide perovskite film treated by passivating agent

Michael Graetzel, Shaik Mohammed Zakeeruddin, Essa Awadh R Alharbi, Anurag Krishna, Lukas Pfeifer

This invention relates to an optoelectronic or photovoltaic device comprising a perovskite or metal halide perovskite film treated by one or more compounds of formula (I): ((R1-NH(R2)-R3)+)nW (I), wherein n is an integer selected from 1, 2, or 3; R1, R2, R ...

2023

Molecular engineering of low-cost, efficient, and stable photosensitizers for dye-sensitized solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Marina Freitag, Jing Gao, Felix Thomas Eickemeyer, Zhongjin Shen, Lukas Pfeifer

The cost, stability, and photovoltaic performance of photosensi-tizers play a key role in the commercialization of dye-sensitized solar cells (DSCs). Herein, three novel sensitizers termed ZS10, ZS11, and ZS12 are described based on the simple chemical str ...

Cell Press2023

Interfacial Modulation through Mixed-Dimensional Heterostructures for Efficient and Hole Conductor-Free Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Anwar Qasem M Alanazi, Jovana Milic, Felix Thomas Eickemeyer, Hong Zhang, Laura Piveteau

Perovskite solar cells have led the new surge of solar energy research. However, their instability is a pressing issue mostly attributed to the perovskite interface with charge-selective transport layers. In this work, diethylammonium iodide (DEAI) surface ...

Wiley-V C H Verlag Gmbh2023

Efficient Cu2O Photocathodes for Aqueous Photoelectrochemical CO2 Reduction to Formate and Syngas

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mounir Driss Mensi, Kevin Sivula, Linfeng Pan, Yongpeng Liu, Dan Ren, Jing Gao, Meng Xia, Jun Li

Photoelectrochemical carbon dioxide reduction (PEC-CO2R) represents a promising approach for producing renewable fuels and chemicals using solar energy. However, attaining even modest solar-to-fuel (STF) conversion efficiency often necessitates the use of ...

Amer Chemical Soc2023

Nanocrystalline Flash Annealed Nickel Oxide for Large Area Perovskite Solar Cells

Michael Graetzel, Jovana Milic, Felix Thomas Eickemeyer

The industrialization of perovskite solar cells requires adequate materials and processes to make them economically viable and environmentally sustainable. Despite promising results in terms of power conversion efficiency and operational stability, several ...

WILEY2023

CsPbBr3 Quantum Dots-Sensitized Mesoporous TiO2 Electron Transport Layers for High-Efficiency Perovskite Solar Cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Jingshan Luo, Jing Gao, Felix Thomas Eickemeyer, Hong Zhang, Linrui Duan

The carrier transport layer plays a critical role in high efficiency and stable perovskite solar cells (PSCs). Herein, CsPbBr3 quantum dots-sensitized mesoporous TiO2 (CPB-TiO2) electron transport layer for fabricating high-quality perovskite films with en ...

WILEY-V C H VERLAG GMBH2023

Tailoring passivators for highly efficient and stable perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Hong Zhang, Lukas Pfeifer

There is an ongoing global effort to advance emerging perovskite solar cells (PSCs), and many of these endeavours are focused on developing new compositions, processing methods and passivation strategies. In particular, the use of passivators to reduce the ...

NATURE PORTFOLIO2023

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