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High-Performance Perovskite Solar Cells with Zwitterion-Capped-ZnO Quantum Dots as Electron Transport Layer and NH_(4)X(X=F,Cl,Br)Assisted Interfacial Engineering

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Energy & Environmental Materials 2024年第5期7卷 321-331页

作者： Rashmi Runjhun Essa A.Alharbi Zygmunt Druzyński Anurag Krishna Ma■gorzata Wolska-Pietkiewicz ViktorŠkorjanc Thomas P.Baumeler George Kakavelakis felix eickemeyer Mounir Mensi Shaik M.Zakeeruddin Michael Graetzel Janusz Lewiński Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/5201-224 WarsawPoland Laboratory of Photonics and Interfaces Institute of Chemical Sciences and EngineeringSchool of Basic SciencesEcole Polytechnique Fédérale de LausanneCH-1015 LausanneSwitzerland Microelectronics and Semiconductors Institute King Abdulaziz City for Science and Technology(KACST)11442 RiyadhSaudi Arabia Faculty of Chemistry Warsaw University of TechnologyNoakowskiego 300-664 WarsawPoland Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de LausanneValais WallisCH-1951 SionSwitzerland

The systematic advances in the power conversion efficiency(PCE)and stability of perovskite solar cells(PSCs)have been driven by the developments of perovskite materials,electron transport layer(ETL)materials,and interfacial passivation between the relevant *** zinc oxide(ZnO)is a promising ETL in thin film photovoltaics,it is still highly desirable to develop novel synthetic methods that allow both fine-tuning the versatility of ZnO nanomaterials and improving the ZnO/perovskite *** various inorganic and organic additives,zwitterions have been effectively utilized to passivate the perovskite *** this vein,we develop novel,well-characterized betaine-coated ZnO QDs and use them as an ETL in the planar n-i-p PSC architecture,combining the ZnO QDs-based ETL with the ZnO/perovskite interface passivation by a series of ammonium halides(NH_(4)X,where X=F,Cl,Br).The champion device with the NH4F passivation achieves one of the highest performances reported for ZnO-based PSCs,exhibiting a maximum PCE of~22%with a high fill factor of 80.3%and competitive stability,retaining~78%of its initial PCE under 1 Sun illumination with maximum power tracking for 250 h.

关键词： interface passivations perovskites quantum dots solar cells zinc oxide zwitterions

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Improving the operational stability of perovskite solar cells with cesium-doped graphene oxide interlayer

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Journal of Energy Chemistry 2024年第9期96卷 483-490页

作者： Masaud Almalki Katerina Anagnostou Konstantinos Rogdakis felix T.eickemeyer Mostafa Othman Minas M.Stylianakis Dimitris Tsikritzis Anwar Q.Alanazi Nikolaos Tzoganakis Lukas Pfeifer Rita Therisod Xiaoliang Mo Christian M.Wolff Aïcha Hessler-Wyser Shaik M.Zakeeruddin Hong Zhang Emmanuel Kymakis Michael Grätzel Laboratory of Photonics and Interfaces École Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Department of Electrical and Computer Engineering Hellenic Mediterranean UniversityHeraklionCrete 71410Greece Institute of Electrical and Microengineering(IEM)Photovoltaics and Thin-Film Electronics Laboratory(PV-Lab) École Polytechnique Fédérale de Lausanne(EPFL)Neuchâtel 2000Switzerland Department of Nursing Faculty of Health SciencesHellenic Mediterranean UniversityCrete 71410Greece Centre Interdisciplinaire de Microscopie Electronique École Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Future Energy Technology Institute King Abdulaziz City for Science and Technology(KACST)P.O.Box 6086Riyadh 11442Saudi Arabia State Key Laboratory of Photovoltaic Science and Technology Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and PerceptionInstitute of OptoelectronicsDepartment of Materials ScienceFudan UniversityShanghai 200433China

Perovskite solar cells(PSCs)have made great advances in terms of power conversion efficiency(PCE),yet their subpar stability continues to hinder their *** interface between the perovskite layer and the charge-carrier transporting layers plays a crucial role in undermining the stability of *** this work,we propose a strategy to stabilize high-performance PSCs with PCE over 23%by introducing a cesium-doped graphene oxide(GO-Cs)as an interlayer between the perovskite and hole-transporting *** GO-Cs treated PSCs exhibit excellent operational stability with a projected T80(the time where the device PCE reduces to 80%of its initial value)of 2143 h of operation at the maximum powering point under one sun illumination.

关键词： Perovskite solar cells Doped graphene oxide Graphene related material Long-term operational stability

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High-Performance Perovskite Solar Cells with Zwitterion-Capped-Zn0 Quantum Dots as Electron Transport Layer and NH4X（X=F,Cl,Br） Assisted Interfacial Engineering

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Energy & Environmental Materials 2024年第5期 325-335页

作者： Rashmi Runjhun Essa A.Alharbi Zygmunt Druzynski Anurag Krishna Ma?gorzata Wolska-Pietkiewicz Viktor ?korjanc Thomas P.Baumeler George Kakavelakis felix eickemeyer Mounir Mensi Shaik M.Zakeeruddin Michael Graetzel Janusz Lewinski Institute of Physical Chemistry Polish Academy of Sciences Laboratory of Photonics and Interfaces Institute of Chemical Sciences and Engineering School of Basic Sciences Ecole Polytechnique Fédérale de Lausanne Microelectronics and Semiconductors Institute King Abdulaziz City for Science and Technology (KACST) Faculty of Chemistry Warsaw University of Technology Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne

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Amyloid-β-induced disruption of axon-initial-segment mitochondria localization:consequences for TAU missorting in Alzheimer's disease pathology

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Neural Regeneration Research 2025年第5期20卷 1407-1408页

作者： Daniel Adam felix Langerscheidt Hans Zempel Institute of Human Genetics University Hospital CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany

TAU is a neuronal microtubule-associated protein preferentially located in *** a battery of neurodegenerative diseases termed"tauopathies,"including Alzheimer's disease (AD),TAU is missorted and abnormally phosphorylated,leading to filamentous accumulations of hyperphosphorylated TAU,a pathological hallmark and potential disease driver of AD and related tauopathies (Zempel,2024).

关键词： Alzheimer tau diseases

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Nanoscale interfacial engineering enables highly stable and efficient perovskite photovoltaics

Nanoscale interfacial engineering enables highly stable and ...

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第八届新型太阳能材料科学与技术学术研讨会

作者： Anurag Krishna Hong Zhang Zhiwen Zhou Thibaut Gallet Mathias Dankl Olivier Ouellette felix T.eickemeyer Fan Fu Mounir Mensi Shaik M.Zakeeruddin Ursula Rothlisberger G.N.Manjunatha Reddy Alex Redinger Michael Gr?tzel Anders Hagfeldt Laboratory of Photomolecular Science Institute of Chemical Sciences and Engineeringécole Polytechnique Fédérale de Lausanne Laboratory of Photonics and Interfaces école Polytechnique Fédérale de Lausanne

Long-term operational stability remains the primary concern for perovskite solar cells. Consequently, there is a quest for searching for new compositions that enable stable and efficient perovskites. We report a new molecular-level interface engineering strategy using a multifunctional ligand that augments long-term operational and thermal stability by chemically modifying the formamidinium lead iodide rich photoactive layer. The surface derivatized solar cells exhibited high operational stability(maximum powering point tracking at 1 sun) with a stabilized T80(the time over which the device efficiency reduces to 80% of its initial value of post-burn-in) of ≈5950 h at 40 oC and stabilized efficiency over 23%. The origin of high device stability and performance is correlated to the nano/subnanoscale molecular level interactions between ligand and perovskite layer, which is corroborated by comprehensive multiscale characterization. Our results provide key insights into the modulation of the grain boundaries, local density of states, surface bandgap, and interfacial recombination. Chemical analysis of the aged devices showed that interface passivation inhibited ion migration and prevented photoinduced I2 release that irreversibly degrades the perovskite. This study shows that passivating ligands have the potential to overcome stability issues associated with the high performing hybrid perovskite compositions, thus allowing a step closer to achieving long-standing stability of perovskitebased solar cells.

关键词： perovskite solar cells supramolecular chemistry molecular passivation grain boundaries defects operational stability

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The German Energiewende and its roll-out of renewableenergies： An economic perspective

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Frontiers in Energy 2017年第2期11卷 126-134页

作者： Sebastian KREUZ felix MUSGENS Faculty of Mechanical Engineering Electrical and Energy SystemsBrandenburg University of Technology 03046 Cottbus Germany

This paper gives a short overview of the German Energiewende, i.e. the transition of a large and mostly thermal electricity system towards electricity generation from renewable energy source. It discusses both, the motivation of the transitions as future goals and current status. Furthermore, it gives an in-depth view into the changes in economic costs for society as well as electricity price effects, especially for average private households and industrial consumers. It also discusses the benefits of the promotion of renewable energies in Germany.

关键词： electricity system renewable energy cost-benefit analysis

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INFLUENCE OF RARE EARTH DOPING ON MECHANICAL PROPERTY AND MICRO-STRUCTURE OF CHROMIA OXIDE FILM

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Chinese Journal of Mechanical Engineering 2008年第3期21卷 16-19页

作者： JIN Huiming felix Adriana College of Mechanical Engineering Yangzhou University Yangzhou 225005 China College of Materials Engineenng National University of Antiuquia Medellin 23715 Colombia

The isothermal oxidizing kinetics of Co-40Cr alloy and its yttrium ion-implanted samples are studied at 1 000 ℃ in air by thermal-gravity analysis （TGA）. Scanning electronic microscopy （SEM） is used to examine the Cr2O3 oxide film＇s morphology after oxidation. Acoustic emission （AE） method is used in situ for monitoring the cracking and spalling of oxide films formed on both samples during oxidizing and subsequent air-cooling stages. Theoretical model is proposed relating to the film fracture process and is used for analyzing the acoustic emission spectrum both on time domain and on AE-event number domain. It is found that yttrium implantation remarkably reduces the isothermal oxidizing rate of Co-40Cr and improves the anti-cracking and anti-spalling properties of Cr2O3 oxide film. The reasons for the improvement are mainly that the implanted yttrium reduced the grain size of Cr2O3 oxide, increased the high temperature plasticity of oxide film, and remarkably reduced the number and size of Cr2O3/Co-40Cr inteffacial defects.

关键词： Stress Acoustic emission Interface Yttrium Oxidation

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A fast and accurate model for the creation of explosion fragments with improved fragment shape and dimensions

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Defence Technology（防务技术） 2022年第2期18卷 159-169页

作者： David felix Ian Colwill Paul Harris School of Computing Engineering&MathematicsUniversity of BrightonBrightonUK Engineering and Design(Alumni) University of SussexBrightonUK

Explosion models based on Finite Element Analysis(FEA)can be used to simulate how a warhead *** their execution times are *** protection systems need to make very fast predictions,before a fast attacking weapon hits the *** execution times are also needed in real time simulations where the impact of many different computer models is being ***,FEA explosion models are not appropriate for these real-time *** research presented in this paper delivers a fast simulation model based on Mott’s equation that calculates the number and weight of fragments created by an *** addition,the size and shape of fragments,unavailable in Mott’s equation,are calculated using photographic evidence and a distribution of a fragment’s length to its *** model also identifies the origin of fragments on the warhead’s *** results are verified against experimental data and a fast execution time is achieved using uncomplicated simulation *** developed model then can be made available for real-time simulation and fast computation.

关键词： Distribution of fragments Fragment shape Real-time simulation Cylindrical explosion

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Robust Control of a Bevel-Tip Needle for Medical Interventional Procedures

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 244-256页

作者： Surender Hans felix Orlando Maria Joseph Department of Electrical Engineering Indian Institute of Technology RoorkeeRoorkeeUttarakhand 247667India

In minimally invasive surgery, one of the main objectives is to ensure safety and target reaching accuracy during needle steering inside the target organ. In this research work, the needle steering approach is determined using a robust control algorithm namely the integral sliding mode control(ISMC) strategy to eliminate the chattering problem associated with the general clinical scenario. In general, the discontinuity component of feedback control input is not appropriate for the needle steering methodology due to the practical limitations of the driving actuators. Thus in ISMC, we have incorporated the replacement of the discontinuous component using a super twisting control(STC)input due to its unique features of chattering elimination and disturbance observation characteristics. In our study, the kinematic model of an asymmetric flexible bevel-tip needle in a soft-tissue phantom is used to evaluate stability analysis. A comparative study based on the analysis of chattering elimination is executed to determine the performance of the proposed control strategy in real-time needle steering with conventional sliding mode control using vision feedback through simulation and experimental results. This validates the efficacy of the proposed control strategy for clinical needle steering.

关键词： Minimal invasive surgery needle steering nonholonomic system robust control sliding mode control

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Neuronal trafficking as a key to functional recovery in immune-mediated neuropathies

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Neural Regeneration Research 2024年第11期19卷 2331-2332页

作者： felix Kohle Michael Schroeter Department of Neurology University of Cologne and University Hospital CologneCologneGermany

Immune-mediated neuropathies are rare diseases of the peripheral nervous system(PNS),substantially affecting patients’functionality and quality of *** are amenable to immunomodulatory treatments,which in many cases stabilize disease progression,but long-term deficits persist in many *** long-term deficits are particularly observed in monophasic autoimmune neuropathies like Guillain-Barrésyndrome and also in chronic variants,e.g.,chronic inflammatory demyelinating neuropathy(Fadia et al.,2019).

关键词： diseases autoimmune

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